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Ce3+-doped CaSrSiO4 blue phosphor prepared via a novel selfreduction strategy for high-CRI solid-state lighting and visible light communication 认领 引用 被引量：1
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作者 Yuqi Cai Chunyu Zuo +6 位作者 Weiling Yang Yifeng Zhu Shuai Yang Yingchao Li Xin Zhao Zhuang Liu Chun Li 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第1期56-66,共11页
This study focuses on the synthesis and luminesce nce properties of Ce3+-doped CaSrSiO4 phosphor.Typically,the synthesis of Ce3+luminescent materials requires a reducing atmosphere.In this work,the traditiona... This study focuses on the synthesis and luminesce nce properties of Ce3+-doped CaSrSiO4 phosphor.Typically,the synthesis of Ce3+luminescent materials requires a reducing atmosphere.In this work,the traditional high-temperature solid-phase method was used in air atmosphere with SiC as the reducing material to successfully prepare CaSrSiO4:Ce3+ blue phosphor,and the self-reduction mechanism is discussed.The samples were characterized by X-ray diffraction(XRD),Rietveld refined XRD,scanning electron microscopy(SEM),and X-ray photoelectron spectroscopy(XPS),and the characterization results show that the CaSrSiO4 phase is obtained.The resulting phosphor exhibits exceptional brightness in blue light and remarkable thermal stability,with a ratio of 94% at elevated temperatures(423 K/303 K).The Ca1-xSr1-xSiO4:0.015Ce3+,0.015Li+ phosphors were combined with commercial green and red powders to create a white light-emitting diode(WLED) package with 365 nm chips.This results in a WLED with high performance,featuring a high color rendering index of Ra=95 and a correlated color temperature(CCT) of 5373 K.At the same time,a visible light communication system was produced to test the communication bandwidth.Compared with commercial YAG:Ce3+ phosphor and BAM:Eu2+ phosphor,the bandwidth is increased by 40.9% and 1092.3%,respectively. 展开更多
关键词 CaSrSiO4phosphor Visible light communication Solid state lighting Bandwidth Self-reducing phosphor Rare earths
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Achievement of an ultra-broadband deep red phosphor K3Ca0.3Y0.7Si2O7:Eu^(2+)(phase 1)for phytochrome matching plant-lighting 认领 引用 被引量：1
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作者 Xiaoshuai Zhang Xi Wang +6 位作者 Tao Yin Xuping Han Panlai Li Xiaoyan Yu Zixuan Wang Chengrun Liu Zhijun Wang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第1期103-111,共9页
The market demand for environmentally controlled agricultural indoor lighting is gradually increasing due to environmental pollution and drastic changes in the natural climate.Generally,matrix K3YSi2O7(phase ... The market demand for environmentally controlled agricultural indoor lighting is gradually increasing due to environmental pollution and drastic changes in the natural climate.Generally,matrix K3YSi2O7(phase 1) is difficult to synthesize compared to K3YSi2O7(phase 2),which has been illustrated by theoretical calculations.In this paper,large quantities of pure phase K3YSi2O7(phase 1) matrix were obtained by the substitution engineering strategy(Ca^(2+)→Y3+).Subsequently,Eu^(2+) was doped to obtain a thermally stable ultra-wideband deep red light-emitting phosphor with an emission band centered at721 nm and a full width at half maximum of 186 nm under 450 nm light excitation.It is noteworthy that compared with K3YSi2O7:Eu(phase 2),K3Ca0.3Y0.7Si2O7:Eu^(2+)(phase 1) is superior in terms of emission wavelength,full width at half maximum,and thermal stability.Furthermore,the spectrum resemblance between its emission spectrum and the photosensitive pigment Pfr was calculated to be 97.5%,which set the stage for subsequent plant lighting applications.Finally,light-emitting diode devices were prepared using K3Ca0.3Y0.7Si2O7:Eu^(2+) phosphor for plant lighting experiments,and plants grown under deep red light emitting diode light show more luxuriant growth.The results show that the phosphor K3Ca0.3Y0.7Si2O7:Eu^(2+) has promising applications in indoor plant culture.Meanwhile,the successful implementation of ion substitution engineering also provides a new strategy for transitions in host systems. 展开更多
关键词 Ion substitution Phase transition Eu2+ions Deep red light-emitting Plant lighting Rare earths
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Chronic dental lighting disrupts blood-retinal barrier homeostasis via vascular and inflammatory pathways 认领 引用
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作者 Haiyang Sun Shuhuai Meng +10 位作者 He Cai Zhengyi Xu Kuo Gai Dan Meng Yixin Shi Feng Luo Xibo Pei Jian Wang Anjali P.Kusumbe Qianbing Wan Junyu Chen 《International Journal of Oral Science》 SCIE CAS CSCD 2026年第2期241-257,共17页
Excessive lighting is integral to dentists’daily routines but can impair their vision,affecting personal and professional performance.Most studies focus on acute photodamage,neglecting chronic photo-injury from denta... Excessive lighting is integral to dentists’daily routines but can impair their vision,affecting personal and professional performance.Most studies focus on acute photodamage,neglecting chronic photo-injury from dental lighting and its impact on the blood-retinal barrier homeostasis.An epidemiological survey involving 14523 individuals showed dentists had 3.6 times higher odds of visionrelated issues compared to other occupations(OR=3.639,95%CI:3.064–4.323).Subsequently,chronic photodamage models in rats were created to accurately simulate dental working conditions.Using systematic imaging and gene analysis,including OCT,tissue clearing technology and RNA-sequencing,dental lighting was found to disrupted both inner and outer blood-retinal barriers,reduced retinal blood vessels,and promoted perivascular macrophage recruitment.Among them,the number of capillary branches decreased sharply.Moreover,the activation of inflammatory-related pathways such as NF-κB signaling resulted in the damage of vision-related functional structures in the retina.Notably,among three dental light sources,low-intensity halogen caused minimal retinal damage,whereas blue and white LEDs significantly disrupted blood-retinal barrier homeostasis.This study explored the potential mechanism of dental lighting environment inducing the disruption of blood-retinal barrier homeostasis,and provided essential guidance for dental professionals in selecting light sources,which is conducive to reducing the risk of occupational ocular diseases among dentists. 展开更多
关键词 vascular pathways inflammatory pathways photodamage models chronic dental lighting epidemiological survey dental lighting blood retinal barrier acute photodamageneglecting
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High-performance(Y _(1-x )Cex)3Al5O12 ceramics synthesized by spark plasma sintering for high-power laser-driven lighting 认领 引用 被引量：1
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作者 Simin Gu Zezhong Yang +3 位作者 Huiwang Lian Chonggeng Ma Andrzej Suchocki Jing Wang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第1期67-74,共8页
Highly thermotolerant and photostable luminescent ceramics are attracting great attention as promising luminescent materials for laser-driven lighting.Herein we report high-performance(Y1-xCex)3Al5O12ce... Highly thermotolerant and photostable luminescent ceramics are attracting great attention as promising luminescent materials for laser-driven lighting.Herein we report high-performance(Y1-xCex)3Al5O12ceramics synthesized by spark plasma sintering(SPS).Owing to the advantages of the regular grain particles and clear grain boundaries of ceramic with cubic garnet structure,the SPS-prepared(Y0.95Ce0.05)3Al5O12 ceramic shows high quantum efficiency with IQE of 98.17% and EQE of 70.42%.It also exhibits excellent luminescence thermal stability and the as-synthesized ceramic maintains 95.11% of integral PL intensity at 423 K compared to that at room temperature.Moreover,the(Y0.95Ce0.05)3Al5O12 ceramic can withstand a high laser power density of 21 W/mm2 and emits high-brightness white lighting with a luminous efficiency of 219.39 lm/W.With excellent optical performance,the fabricated (Y0.95Ce0.05)3Al5O12 ceramic can be widely applied as a reliable color converter material for high-power laser-driven lighting. 展开更多
关键词 (Y1-xCex)3Al5O12ceramics Spark plasma sintering(SPS) High-power laser-driven lighting Rare earths
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Lighting upβ-cell function:Noninvasive MRI of glucose-stimulated Zn2+secretion 认领 引用
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作者 Lixiong Dai Mauro Botta Shiyuan Liu 《Magnetic Resonance Letters》 EI CAS 2026年第3期82-83,共2页
Deep-tissue visualization of Zn2+flux represents a significant yet challenging objective in molecular diagnostics[1].Since Zn2+is co-released with insulin during glucose-stimulated secretion,real-time imaging of... Deep-tissue visualization of Zn2+flux represents a significant yet challenging objective in molecular diagnostics[1].Since Zn2+is co-released with insulin during glucose-stimulated secretion,real-time imaging of its dynamics could provide a non-invasive window intoβ-cell function and the progression of diabetes[2].However,achieving this goal requires overcoming two major hurdles:sufficient tissue penetration and high detection sensitivity[3].In this context,the recent work by Bingbo Zhang and colleagues represents an important advance.They report a rationally designed Fe3+-based probe,FeL2,which integrates a structurally reinforced Zn2+-responsive motif that effectively enhances relaxivity in deep-seated tissues such as the pancreas,offering a promising new tool for diabetes management and advancing the field of metabolic imaging[4]. 展开更多
关键词 noninvasive MRI real time imaging Zn flux glucose stimulated Zn secretion tissue penetration lighting up cell function molecular diagnostics deep tissue visualization
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Application of plant factory with artificial lighting in horticultural production:current progress and future trends 认领 引用 被引量：4
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作者 Meng Guo Zhi Jin +1 位作者 Li Ma Siying Ou 《Horticultural Plant Journal》 SCIE CAS CSCD 2026年第4期747-763,共17页
Horticultural production,enriched in essential nutrients such as proteins,carbohydrates,vitamins,and lipids,face challenges due to rapid global population growth,resource shortages,environmental degradation,and a decl... Horticultural production,enriched in essential nutrients such as proteins,carbohydrates,vitamins,and lipids,face challenges due to rapid global population growth,resource shortages,environmental degradation,and a decline in the number of horticultural practitioners.These challenges prevent their yield and quality from meeting sustainability requirements.By regulating temperature,humidity,light,and nutrient supply,plant factories with artificial lighting(PFALs)enable stable crop cultivation,facilitate year-round production,and promote efficient resource use,yielding high-quality horticultural products with significant application potential.However,issues such as high initial investment and electricity costs remain unresolved.Primarily,PFALs are utilized in the production of green leafy vegetables,transplants,and medicinal plants.In PFALs,lettuce yield can increase by over 50%under optimal lighting conditions compared to traditional methods.PFALs are also employed in the commercial production of horticultural seedlings,technical research on shortening growth cycle and mechanism research on environmental regulation of metabolites.This supports rapid breeding and the production of high-value horticultural products.Additionally,this paper addresses the challenges faced by plant factories in horticultural production and explores prospects and considerations for PFAL applications in this domain. 展开更多
关键词 Plant factory Light emitting diode Horticultural crop Environmental conditions Photosynthesis
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Efficient Double Perovskite Cs2NaGdCl6:Sb3+/Pr3+for Plant-Cultivation Lighting,Advanced Optical Anti-Counterfeiting,and WLED Applications 认领 引用
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作者 Huangyao Chen Heng Yu +5 位作者 Ti Feng Kang Wang Can Yuan Zhanghai Tian Ruirui Cui Xiang Guo 《Rare Metals》 SCIE EI CAS CSCD 2026年第5期794-809,共16页
Developing multifunctional luminescent materials with tunable spectra is crucial for plant lighting and information-security applications.To address the critical requirement of plant photosynthesis for blue and red sp... Developing multifunctional luminescent materials with tunable spectra is crucial for plant lighting and information-security applications.To address the critical requirement of plant photosynthesis for blue and red spectral components,a novel leadfree double perovskite Cs2NaGdCl6:Sb3+,Pr3+phosphor was designed and synthesized via a hydrothermal method.By incorporating Sb3+ions with an ns2 electronic configuration,broadband blue emission originating from self-trapped excitons(STEs)was induced within the host lattice.Concurrently,the stability and electron-phonon coupling strength of this STE emission were systematically investigated.Furthermore,the introduction of Pr3+established an efficient energy transfer channel(Sb3+→Pr3+),activating red emission at 652 nm derived from the3P0→3F2transition,enabling efficient dual-band blue-red luminescence.The fabricated single-phase light-emitting diode(LED)achieved a 90.28%spectral match with chlorophyll b absorption,along with an internal quantum efficiency of 49.81%and an external quantum efficiency of 29.41%.Leveraging the distinct excitation responses and spectral tunability across the series of materials,a multilevel dynamic anticounterfeiting system integrating excitation selectivity and narrow-band gating was constructed.Additionally,a highperformance white LED device was realized based on Cs2NaGdCl6:0.01Sb3+,0.15Pr3+,yielding a high color rendering index of 93.1,a correlated color temperature of 4790 K,and chromaticity coordinates of(0.35,0.37).This work not only presents a high-performance material for plant lighting and display applications but also provides new insights into the functional design of lead-free double perovskite phosphors. 展开更多
关键词 Cs2NaGdCl6 energy transfer lead-free double perovskite optical information encryption plant growth lighting WLEDs
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Self-trapped Excitons in Metal Halides for Lighting Applications 认领 引用
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作者 ZHANG Xiang LIU Nian +1 位作者 LUO Jiajun TANG Jiang 《发光学报》 EI CAS CSCD 北大核心 2026年第3期423-435,共13页
Metal halides have attracted worldwide attention as exceptional optoelectronic materials.Over the past decade,research on metal halides has yielded remarkable progress,and their color-conversion applications have show... Metal halides have attracted worldwide attention as exceptional optoelectronic materials.Over the past decade,research on metal halides has yielded remarkable progress,and their color-conversion applications have shown considerable promise for commercialization.With the reporting of self-trapped exciton(STE)emission in perovskites,the application of metal halides as broadband emitting materials in the lighting field has gained increas-ing interest.Herein,we provide a comprehensive review of metal halide STE emitters,especially for lighting applications.We begin with highlighting the ideal spectral characteristics and corresponding performance metrics for lighting.This is followed by a systematic summary of the mechanisms,optimization strategies,and recent advances of STE emission in metal halides.Finally,we outline the major challenges and prospective trends for metal halide STE emitters.This review aims to offer valuable insights into metal halide STE emitters and their lighting applications for facilitating the future commercialization. 展开更多
关键词 self-trapped exciton metal halide lighting optoelectronic applications
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Oxygen vacancy-induced cerium self-reduction in cyan-emitting phosphors for high-quality white lighting and visible light communication applications 认领 引用 被引量：3
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作者 Yu-Qi Cai Chun-Yu Zuo +7 位作者 Wei-Ling Yang Xiao-Qing Pei Yi-Feng Zhu Shuai Yang Ying-Chao Li Xin Zhao Zhuang Liu Chun Li 《Rare Metals》 SCIE EI CAS CSCD 2025年第12期10672-10684,共13页
Self-reducing phosphors have attracted significant attention due to their avoidance of hazardous gases(H2/CO/N2),offering safer and more economical alternatives.This work reveals oxygen vacancy defect-induced Ce... Self-reducing phosphors have attracted significant attention due to their avoidance of hazardous gases(H2/CO/N2),offering safer and more economical alternatives.This work reveals oxygen vacancy defect-induced Ce3+self-reduction behavior in garnet structure.The Ca2Gd1-xZr2Al3O12:Ce3+cyan phosphors were successfully synthesized via conventional high-temperature solidstate reaction in ambient atmosphere.Photoluminescence(PL) spectra revealed a strong emission centered at 490 nm,aligning well with the cyan component required in WLEDs.The relatively short fluorescence lifetime further implies the potential of CGZA:Ce3+/4+phosphors for high-speed visible light communication(VLC).By combining electron paramagnetic resonance(EPR) spectroscopy with density functional theory(DFT) calculations,the self-reduction behavior of Ce4+to Ce3+in the garnet structure was elucidated.The results suggest that oxygen vacancies play a critical role in facilitating the reduction process.DFT calculations revealed that Ce doping significantly lowers the formation energy of oxygen vacancies,thereby promoting self-reduction.These findings provide valuable insights into the design of novel self-reducing Ce3+-based phosphors for advanced lighting and optical communication applications. 展开更多
关键词 Ca2GdZr2Al3O12phosphor Solid State lighting Visible light communication Cyan Emitting phosphor Self Reducing phosphor
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Efficient Sr0.5Ca0.5AlSiN3∶Eu2+red-emitting ceramics for high-power solid-state lighting 认领 引用 被引量：4
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作者 Rundong Tian Qihao Wang +2 位作者 Shuxing Li Tianliang Zhou Rong-Jun Xie 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第7期179-187,共9页
Solid-state lighting is now developing toward high-power and super-brightness,but is largely limited by the lack of highly robust and efficient color conversion materials that can be survived from high-power or high-p... Solid-state lighting is now developing toward high-power and super-brightness,but is largely limited by the lack of highly robust and efficient color conversion materials that can be survived from high-power or high-power density excitation,typically the red-emitting ones.In this work,we fabricated highly effi-cient and pore-free Sr0.5Ca0.5AlSiN3∶Eu2+(SCASN)red-emitting ceramics by spark plasma sintering of fine phosphor powders.These fine phosphor powders were prepared by treating the commercial phosphors with high-energy ball-milling,centrifugation and acid washing,leading to a particle size of 2.55μm and an internal quantum efficiency as high as 74.0%under 450 nm excitation.The phosphor powders can be densified into SCASN ceramics without using sintering additives at a temperature as low as 1475℃,and the ceramics show an internal quantum efficiency of 75.3%,which is 50%higher than those ceram-ics fabricated with untreated commercial powders.When excited by a high-power blue LED at a current density of 4 A/mm2,the SCASN ceramics have a maximum luminous flux of 660 lm(i.e.,26 Mcd/m2).The phosphor ceramics can also withstand a high laser power density of 15.7 W/mm2,and exhibit an output luminance of 188 Mcd/m2.This work provides a general method to prepare fine phosphor powders that enable to fabricate high efficiency phosphor ceramics used in high-power solid-state lighting. 展开更多
关键词 Sr0.5Ca0.5AlSiN3:Eu2+ Color converter Quantum efficiency LEDs Laser lighting
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Dichromatic fluorescent splicing color wheel:Enabling high-quality laser lighting on high thermal conductivity AlN substrate 认领 引用 被引量：2
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作者 Yanrong Liang Xiangjia Sun +7 位作者 Tongtong Zhu Haitao Wang Shuo Wang Xiaojuan Liang Weidong Xiang Weiwei Huan Jie Li Junlong Wang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第27期129-138,共10页
In recent years,the development of solid-state lighting devices has increasingly shifted towards high-power laser illumination,making it imperative to develop fluorescent conversion materials with exceptional thermal ... In recent years,the development of solid-state lighting devices has increasingly shifted towards high-power laser illumination,making it imperative to develop fluorescent conversion materials with exceptional thermal stability and luminous quality.In this study,we introduced a highly reflective TiO2 substrate in combination with a high thermal conductivity AlN substrate to design a Ce:YAG-PiG-TiO2-AlN Film(Ce:YAG PTAF)color converter with outstanding photothermal performance.Remarkably,the thermal conductivity of this material reaches 48.28 W m-1 K-1.Notably,the optimized PTAF can withstand a high-power output of up to 12.14 W in a static environment,with a maximum luminous flux(LFmax)of 2284.6 lm and maximum luminous efficacy(LEmax)of 222.35 lm W-1,showcasing its excellent optical properties.Furthermore,the fabricated Ce:YAG-PiG-TiO2-AlN-Wheel(Ce:YAG PTAW),equipped with a motor operating at 7200 r/min,emits an extraordinary brightness of 4404 lm under 88 W of ultra-high laser irradiation,with stability surpassing that of commercial silicone color wheels,thanks to its superior Li2O-Al2O3-SiO2(LAS)glass system.Interestingly,we designed an innovative spatially separated two-color segmented wheel structure,effectively mitigating the photon reabsorption phenomenon caused by the overlap of the fluorescent powder absorption peaks.When the ratio of Ce:YAG to Ce:GdYAG is 240:120,it yields white light with a color rendering index(CRI)of 80.2,and luminous flux remaining at 3317.8 lm.When encapsulated in a reflective module,it accurately reflects the true color states of objects.These results collectively indicate that both Ce:YAG PTAF and PTAW possess significant application potential in the realm of high-power laser illumination. 展开更多
关键词 Ce:YAG AlN substrate Laser lighting Dichromatic fluorescent splicing color wheel
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Rendered image denoising method with filtering guided by lighting information 认领 引用 被引量：2
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作者 MA Minghui HU Xiaojuan +2 位作者 ZHANG Ripei CHEN Chunyi YU Haiyang 《Optoelectronics Letters》 EI 2025年第4期242-248,共7页
The visual noise of each light intensity area is different when the image is drawn by Monte Carlo method.However,the existing denoising algorithms have limited denoising performance under complex lighting conditions a... The visual noise of each light intensity area is different when the image is drawn by Monte Carlo method.However,the existing denoising algorithms have limited denoising performance under complex lighting conditions and are easy to lose detailed information.So we propose a rendered image denoising method with filtering guided by lighting information.First,we design an image segmentation algorithm based on lighting information to segment the image into different illumination areas.Then,we establish the parameter prediction model guided by lighting information for filtering(PGLF)to predict the filtering parameters of different illumination areas.For different illumination areas,we use these filtering parameters to construct area filters,and the filters are guided by the lighting information to perform sub-area filtering.Finally,the filtering results are fused with auxiliary features to output denoised images for improving the overall denoising effect of the image.Under the physically based rendering tool(PBRT)scene and Tungsten dataset,the experimental results show that compared with other guided filtering denoising methods,our method improves the peak signal-to-noise ratio(PSNR)metrics by 4.2164 dB on average and the structural similarity index(SSIM)metrics by 7.8%on average.This shows that our method can better reduce the noise in complex lighting scenesand improvethe imagequality. 展开更多
关键词 establish paramet rendered image denoising Monte Carlo method filtering guided lighting information denoising algorithms image segmentation algorithm rendered image denoising method monte carlo methodhoweverthe
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Spatial pattern of the Chinese economy and spatial heterogeneity of its influential factors:An empirical study based on nighttime lighting data 认领 引用
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作者 Yifeng Hai Yuanjie Deng +2 位作者 Hang Chen Dingdi Jize Ji Luo 《Chinese Journal of Population,Resources and Environment》 CSCD 2025年第2期220-235,共16页
China’s economy has developed rapidly since its reform and opening-up.However,the different rates of development in various places due to location and policies have led to significant economic differences.Based on th... China’s economy has developed rapidly since its reform and opening-up.However,the different rates of development in various places due to location and policies have led to significant economic differences.Based on the nighttime lighting data of 281 municipal spatial units in China from 2013 to 2021,this study uses spatial autocorrelation,center of gravity shift,and standard deviation ellipse(SDE)analysis to examine the evolution of the spatial pattern of China’s municipal economy.Based on these,it uses a geographically weighted regression(GWR)model to explore the factors influencing the differences in China’s municipal economy and its spatial heterogeneity.The paper reveals the following results.First,China’s municipal economy as a whole shows a growing trend.Second,the SDE shows a“north-south”distribution pattern,and the concentration of China’s economic development has slightly increased,with a significant centripetal distribution.Third,spatial correlation shows spatial positive correlation,the degree of which is increasing,with strong spatial heterogeneity and regional agglomeration.Finally,measuring the influencing factors according to GWR,the industrial structure and education expenditure coefficients generally show a decreasing trend from the southeast coast to the northwest and inland due to the degree of transformation of industrial structure and the lagging effect of education expenditure on economic growth.Conversely,the innovation driver and urban area coefficients show a decreasing trend from the northwest inland to the southeast coast due to the law of diminishing marginal utility of innovation drivers and differences in urbanization development.Government expenditure coefficients show a higher trend in the East and a lower trend in the West due to policy favoritism and market development level.This research can serve as a theoretical reference for China to achieve high-quality development and move toward common prosperity. 展开更多
关键词 Nighttime lighting data Chinese municipalities Economic disparities Geographically weighted regression(GWR)
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High color quality laser-driven white lighting enabled by reflective bicolor phosphor-in-glass film converter 认领 引用
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作者 Yun Mou Ben Tian +6 位作者 Xin Liu Jiuzhou Zhao Xinyuan Wang Deyi Chen Jian Xu Xinzhong Wang Yang Peng 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第9期1844-1851,共8页
All-inorganic reflective phosphor-in-glass film(PiGF) converter has garnered widespread attentions for high brightness laser-driven white lighting,while its poor color quality and low luminescence stability have been ... All-inorganic reflective phosphor-in-glass film(PiGF) converter has garnered widespread attentions for high brightness laser-driven white lighting,while its poor color quality and low luminescence stability have been inevitable roadblocks.Herein,the bicolor PiGF containing green-emitting Y3Al3.08Ga1.92O12:Ce3+(YAGG) and red-emitting CaAlSiN3:Eu2+(CASN) phosphors bonded on Al2O3substrate was prepared for enabling high color quality laser-driven white lighting in reflective configuration.The bicolor PiGF has high quantum efficiency and good structure stability.By optimizing the CASN content,PiGF thickness and Al2O3 content,the reflective bicolor PiGF based white laser diode(LD)displays good luminescence performance with a luminous flux of 451.5 lm and a luminous efficacy of142.3 lm/W and high color quality with a color rendering index(CRI) of 85.3 and a correlated color temperature(CCT) of 5177 K under the incident laser power of 3.15 W,and still has excellent luminescence and color stabilities(CRI and CCT) under the continuous laser excitation of 5.61 W,attributed to the good thermal conductivity and high reflectivity of Al2O3 substrate and scattering enhancement effect of Al2O3 particles.It can be foreseen that the reflective bicolor PiGF converter provides a promising strategy for enabling high quality laser-driven white lighting. 展开更多
关键词 Laser-driven white lighting Phosphor-in-glass film Bicolor reflective phosphor converter Color quality Optical performance Rare earths
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Enhancement of Growth and Quality of Chinese Bayberry Using LED Supplemental Lighting 认领 引用
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作者 Ni Tang Chenchun Hao Rong Qiu 《Phyton-International Journal of Experimental Botany》 SCIE 2025年第8期2551-2562,共12页
Supplemental lighting has emerged as a widely adopted technique in greenhouse cultivation to enhance product visibility andimprove theflavor characteristics ofChinese bayberry(Myrica rubra)in the internationalmarket.W... Supplemental lighting has emerged as a widely adopted technique in greenhouse cultivation to enhance product visibility andimprove theflavor characteristics ofChinese bayberry(Myrica rubra)in the internationalmarket.While studies on lighting have predominantly focused on colorimetry,limited research has addressed the precise control of chromatic parameters and their effect on fruit quality.This study examined the effects of varying lighting conditions,specifically correlated color temperatures and illuminance,on the growth and quality of Chinese bayberry varieties“Black Charcoal”and“Dongkui”using a precision control system.The bayberry plants were exposed to a constant illuminance of 155μmol·m-2·s-1 with chromatic levels ranging from 2250 to 6000 K.Black Charcoal demonstrated substantial improvements under different chromatic parameters,with fruit weight and size increasing by 40%and 14%,respectively.Furthermore,soluble solids content increased by 4% and vitamin C content rose by 142%,while organic acid content decreased by 30%.Dongkui,however,showed more modest responses under identical conditions,with fruit weight increasing by 2% and fruit size decreasing by 1%.Soluble solids and vitamin C contents showed minimal increases of 2% and 2.5%,respectively,while organic acid content decreased by 8%.The findings demonstrate that supplemental LED lighting significantly enhances both yield and quality parameters in Black Charcoal compared with Dongkui.These results provide valuable insights for optimizing Chinese bayberry cultivation,and the precise control methodology developed can be used to improve supplemental lighting strategies in other fruit and plant species. 展开更多
关键词 Chinese bayberry artificial light LED lighting yield fruit quality color coding
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A novel green phosphor Ba2Sc2((BO3)2B2O5):Ce3+for high color rendering index full-spectrum lighting and low-temperature sensors 认领 引用
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作者 Pan Liang Hongshu Zhang +7 位作者 Yingying Xue Saying Li Hongsheng Huang Xin Li Xuxiang Lin Yuxin Zhang Lianqing Li Zhihong Liu 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第6期1150-1160,I0003,共11页
The utilization of phosphors that achieve full-spectrum lighting has emerged as a prevailing trend in the advancement of white light-emitting diode(WLED)lighting.In this study,we successfully prepared a novel green ph... The utilization of phosphors that achieve full-spectrum lighting has emerged as a prevailing trend in the advancement of white light-emitting diode(WLED)lighting.In this study,we successfully prepared a novel green phosphor Ba2Sc2((BO3)2B2O5):Ce3+(BSBO:Ce3+)that can be utilized for full-spectrum lighting and low-temperature sensors.BSBO:Ce3+exhibits a broad-band excitation spectrum centered at 410 nm,and a broad-band emission spectrum centered at 525 nm.The internal and external quantum efficiencies of BSBO:Ce3+are 99%and 49%,respectively.The thermal stability of BSBO:Ce3+can be improved by substituting partial Sc atoms with smaller cations.The thermal quenching mechanism of BSBO:Ce3+and the lattice occupancy of Ce ions in BSBO are discussed in detail.Furthermore,by combining the green phosphor BSBO:Ce3+,the commercial blue phosphor and the red phosphor on a 405 nm chip,a white light source was obtained with a high average color rendering index(CRI)of 96.6,a low correlated color temperature(CCT)of 3988 K,and a high luminous efficacy of 88.0 Im/W.The lu-minous efficacy of the WLED exhibits negligible degradation during the 1000 h light aging experiment.What's more,an emission peak at 468 nm appears when excited at 352 nm and 80 K,however,the relative intensity of the peaks at 468 and 525 nm gradually weakens with increasing temperature,indicating the potential of this material as a low-temperature sensor. 展开更多
关键词 Green phosphor Ba2Sc2(BO32B2O5):Ce3+ Fullspectrum lighting Low-temperature sensor High color rendering index Rare earths
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Simulation of light environment in a serrated photovoltaic greenhouse and optimization of daylighting roofs based on Design Builder 认领 引用 被引量：3
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作者 LIU Jian WU Xuyong +2 位作者 WANG Baolong WU Qingsen TIAN Libo 《农业工程学报》 EI CAS CSCD 北大核心 2025年第7期211-221,共11页
In the tropical regions represented by Hainan,there are abundant solar and thermal resources,and it is relatively suitable for the construction of photovoltaic greenhouse(PVG).However,the construction of PVG still rel... In the tropical regions represented by Hainan,there are abundant solar and thermal resources,and it is relatively suitable for the construction of photovoltaic greenhouse(PVG).However,the construction of PVG still relies mainly on experience and is incapable of quantifying the balance between the photovoltaic(PV)generation and the light requirements for agricultural production.As a result,actual PVGs are primarily PV-based,without carefully considering the needs of agricultural daylighting.To quantify the influence of the design parameters of PVGs and the layout of PV panels on the internal daylighting of serrated PVGs,and to optimize the daylighting design of the roof,this paper utilizes the Design Builder software to establish gradient models for a multi-span serrated-type PVG in tropical regions.Gradient models were established in terms of aspects,namely span,width of longitudinalransverse daylighting strip,height,roof angle,and photovoltaic panel coverage rate(PCR).Daylighting in the greenhouse of each gradient model was simulated,and with the annual average daily light integral(ADLI)and distribution uniformity(DU)as evaluation indicators,the influence of various design parameters on the daylighting inside the greenhouse was quantified.The result reveals that:(1)PCR is the decisive indicator for daylighting in the PVG,and a function between PCR and the ADLI is derived as ADLI=-15.5 PCR+16.841;(2)Increasing the width of longitudinal daylighting strip significantly improves the ADLI and enhances DU while increasing the span has a noticeable effect on improving ADLI but does not significantly enhance DU;(3)Increasing the eave height without changing PCR does not enhance ADLI but effectively improves DU;increasing the transverse daylighting strip and adjusting the roof angle hardly improves ADLI.In summary,it is recommended that the optimal span for PVGs in tropical regions be set within the range of 6.5-8.0m,and the eave height be set within the range of 2.5-3.5m.Preferably,the longitudinal daylighting strip with a width ranging from 0.5-0.8m should be installed.Based on the above relationship function,the PCR can be calculated according to the appropriate light demand for the cultivated crops.The daylighting design theory proposed in this paper can provide a theoretical basis and reference for the healthy development of the PV industry in tropical regions. 展开更多
关键词 photovoltaic greenhouse annual average daily light integral greenhouse design parameters daylighting tropical regions
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Effects of night lighting on avian cognitive function:Mechanisms involving neurodegeneration,metabolic dysregulation and neuroinflammatory responses 认领 引用 被引量：1
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作者 Xiaoqian Li Zeru Gong +1 位作者 Na Zhu Shuping Zhang 《Avian Research》 SCIE CAS CSCD 2025年第4期786-795,共10页
The rapid expansion of urbanization has led to widespread exposure of wild birds to intensive light at night(LAN).While previous studies have established LAN-induced cognitive impairment in birds,the underlying neurob... The rapid expansion of urbanization has led to widespread exposure of wild birds to intensive light at night(LAN).While previous studies have established LAN-induced cognitive impairment in birds,the underlying neurobiological mechanisms remain poorly understood.We hypothesized that LAN exposure impaired cognitive function of birds potentially through neurodegeneration,metabolic dysregulation and neuroinflammatory responses in the telencephalon.Using Zebra Finches(Taeniopygia guttata)as an avian model,under 16L:8D photoperiods,we compared associative learning and memory abilities and neurobiological parameters between experimental groups exposed to dim light at night(LAN)versus nocturnal darkness(CTR).Compared to the CTR birds,the LAN-exposed birds exhibited significantly lower learning and memory performances,reduced neuron density and simplified dendritic morphology in the telencephalons.The key energy metabolic substrates(cholic acid,CTP,D-mannose-6-phosphate)and neuroprotective agents(trehalose,menaquinone,L-gulono-1,4-lactone)in the telencephalons of LAN-exposed birds showed depletion,while oxidative stress markers(methionine sulfoxide)and inflammatory mediators(cis-gondoic acid)exhibited elevation.The neurotransmitter dopamine and histamine metabolic pathway were disrupted in the LAN-exposed birds.The microglias were activated with pro-inflammatory IL-1βand IL-6 levels increasing and anti-inflammatory IL-10 decreasing in the telencephalons of the LAN-exposed birds.These findings indicate a potential mechanistic pathway whereby dim light exposure at night can induce neuroinflammation through oxidative stress-mediated microglial activation,energy metabolism and neurotransmitter homeostasis disruption,ultimately leading to neurodegeneration in the telencephalons of birds. 展开更多
关键词 Birds Cognition Metabolic dysregulation Neurodegeneration Neuroinflammation Night lighting
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Calcium vacancy enhanced self-reduction of Ce4+for single-phase fullspectrum lighting and information encryption 认领 引用
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作者 Ying Li Jiaqi Ou +7 位作者 Shuangqiang Fang Jiali Yu He Lin Haoliang Cheng Xiulan Shui Renjie Xu Zhijie Ye Le Wang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第12期2593-2602,I0001,共10页
Due to the wide and adjustable emission range,Ce3+is an indispensable luminous center for full spectrum lighting.However,it needs to be sintered at high temperature in a reducing atmosphere,resulting in difficulty ... Due to the wide and adjustable emission range,Ce3+is an indispensable luminous center for full spectrum lighting.However,it needs to be sintered at high temperature in a reducing atmosphere,resulting in difficulty to coexisting with other multivalent activated ions(such as Eu3+,Tm3+),which greatly hinders the formation of full spectrum.In this study,a calcium vacancy enhanced self-reduction of Ce4+is realized in CaNaSb2O6F(CNSOF)host under air atmosphere sintering,through which Ce3+,Tm3+and Eu3+coexisting in a single-phase full spectrum phosphor was prepared.Notably,the artificial introduction of a calcium vacancy was designed to verify this self-reduction mechanism.Moreover,the energy transfer kinetics among Tm3+,Ce3+and Eu3+were explored.Finally,combined with a 340 nm UV chip,a full spectrum phosphor-converted light-emitting diode(pc-LED)was fabricated,showing a broad emission range from 400 to 750 nm,Commission Internationale de I'Edairage(CIE)of(0.3485,0.3673),Ra of 92 and correlated color temperature(CCT)of 4933 K.Utilizing the variation in emission colors of this phosphor under different UV wavelengths,a dual encryption method combining point character code and fluorescent encryption technique is proposed.This work provides an effective path for Ce4+self-reduction to apply in full spectrum pc-LED and information encryption. 展开更多
关键词 Self-reduction Ce4+ Single-phase full-spectrum lighting Information encryption Rare earths
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Energy Management of Photovoltaic Plant for Smart Street Lighting System 认领 引用
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作者 Rebhi M’hamed Himri Youcef +1 位作者 Bouchiba Bousmaha Yaichi Mouaadh 《Energy Engineering》 EI 2025年第12期4899-4918,共20页
Currently,most conventional street lighting systems use a constant light mode throughout the entire night,fromsunset to sunrise,which results in high energy consumption and maintenance costs.Furthermore,scientific res... Currently,most conventional street lighting systems use a constant light mode throughout the entire night,fromsunset to sunrise,which results in high energy consumption and maintenance costs.Furthermore,scientific research predicts that energy consumption for street lighting will increase in the coming years due to growing demand and rising electricity prices.The dimming strategy is a current trend and a key concept in smart street lighting systems.It involves turning on the road lights only when a vehicle or pedestrian is detected;otherwise,the control system reduces the light intensity of the lamps.Power control is generally implemented using artificial intelligence algorithms such as fuzzy logic,artificial neural networks,or swarm intelligence to manage different events.In our project,the dimming strategy was utilized to reduce costs and energy consumption by at least 48%.This research proposes a standalone photovoltaic plant(SPP)to power a smart street lighting system,which can replace individual solar street lights in a small neighborhood in southwestern Algeria.This design offers advantages such as lower costs and the option to add additional loads a DC pump,a domestic power supply,or technical services to operate the photovoltaic system during the day after charging the storage batteries,especially when there is monthly energy surplus.The energy surplus analyzed in our project ranges from 804 W in January to 4 kW in June,generated by the entire PV installation.To demonstrate the feasibility and reliability of this system,we studied the implementation of the standalone photovoltaic plant,energymanagement,and economic analysis using the Particle SwarmOptimization technique under MATLAB software. 展开更多
关键词 Plant smart street lighting energy management fuzzy logic control PSO
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