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High-Performance Perovskite Solar Cells and Modules via Slot-Die Coating:Engineering Advances,Photoluminescence Insights,and Future Perspectives 认领 引用 被引量：1
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作者 Li’an Peng Yonglong Mao +4 位作者 Yuxia Yin Yuxin Chen Teng Zhang Shengye Jin Jun Zhang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第9期326-371,共46页
Slot-die coating has solidified its role as the preeminent industrial-scale deposition technique for perovskite photovoltaics,combining exceptional material utilization,direct compatibility with roll-to-roll productio... Slot-die coating has solidified its role as the preeminent industrial-scale deposition technique for perovskite photovoltaics,combining exceptional material utilization,direct compatibility with roll-to-roll production,and high-throughput capability.This review comprehensively surveys recent advances in slot-die-coated perovskite solar cells and modules,with a focused analysis on the governing principles behind the structure–property–performance relationship.We first deconstruct how coating methodologies—including one-step,two-step,and hybrid processes—dictate film morphology and crystalline quality.We then elaborate on perovskite ink engineering,emphasizing the critical role played by solvent selection and functional additives in controlling nucleation kinetics and crystal growth during large-area deposition.Furthermore,we examine innovative interface modulation strategies that enhance film integrity,suppress defects,and mitigate ion migration.A key distinctive feature of this review is its emphasis on advanced photoluminescence(PL)characterization techniques—such as in situ PL,PL imaging,and time-resolved PL—which provide unparalleled insights into crystallization pathways,defect distribution,and charge carrier dynamics.These tools are indispensable for mechanistic decoding and rational optimization of the slot-die process.Finally,we outline pressing research directions,highlighting the necessity to overcome persistent challenges in operational stability,efficiency–stability trade-offs,the establishment of unified stability assessment protocols,and manufacturing reproducibility to ultimately bridge the laboratory-to-fab gap and accelerate the commercialization of slot-die-coated perovskite solar modules. 展开更多
关键词 Slot-die coating Perovskite photovoltaics Process–structure–property relationship Photoluminescence Laboratory-tofab transition
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A viologen-based zinc framework: Photochromism, photoluminescence, ink-free erasable printing, and multiple optical switching properties 认领 引用
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作者 LI Xiaonan ZHANG Jingqi +4 位作者 LEI Jiaxin JIANG Yuxin ZHAO Xin GUO Tingting YAN Juanzhi 《无机化学学报》 SCIE CAS CSCD 北大核心 2026年第6期1337-1344,共8页
A novel viologen-based photochromic coordination polymer,namely[Zn(CV)0.5(BDC)(H2O)]·2H2O(1),has been successfully constructed via solvothermal self-assembly of Zn2+ions with the 1,1′-bis(2-carboxyethyl)-... A novel viologen-based photochromic coordination polymer,namely[Zn(CV)0.5(BDC)(H2O)]·2H2O(1),has been successfully constructed via solvothermal self-assembly of Zn2+ions with the 1,1′-bis(2-carboxyethyl)-4,4′-bipyridinium((H2CV)2+)as a photo-responsive functional unit and terephthalic acid(H2BDC)as an auxiliary bridging ligand.Single-crystal X-ray diffraction analysis reveals that complex 1 features a 1D chain-like framework.Upon light irradiation,complex 1 exhibited a distinct photo-responsive color-changing behavior,transforming from colorless to blue.The blue-colored sample gradually faded and reverted to its original colorless state upon being placed in a dark environment at room temperature,demonstrating excellent reversible photochromic properties.On the basis of its photochromic performance,the application of this complex in ink-free printing has been explored.Furthermore,complex 1 emitted blue light under UV irradiation in a dark environment,revealing favorable photoluminescent characteristics.In addition,complex 1 possessed multiple photoswitchable properties.CCDC:2483052. 展开更多
关键词 viologen photochromism photoluminescence ink-free printing
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Efficient and tunable photoluminescence from Dy3+-doped Cs2NaLuCl6double perovskites via Sb3+sensitization 认领 引用
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作者 Guodong Zhang Yue Lu +4 位作者 Yaning Zhao Peipei Dang Hao Suo Zhijun Wang Panlai Li 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第7期2010-2018,I0001,共9页
Incorporating rare-earth(RE3+)ions into lead-free halide double perovskites represents a promising str ategy for modulating their optical prope rties through energy transfer mechanisms.In this study,Dy3+ions wer... Incorporating rare-earth(RE3+)ions into lead-free halide double perovskites represents a promising str ategy for modulating their optical prope rties through energy transfer mechanisms.In this study,Dy3+ions were successfully incorporated into Cs2NaLuCl6:Sb3+double perovskites via a facile hydrothermal method.The synthesized crystals not only exhibit intense blue emission originating from self-trapped excitons(STEs)but also display effective Dy3+characteristic emissions,thereby broadening the emission spectrum from the visible to the near-infrared region.The energy transfer from STEs to Dy3+is confirmed and extends across various RE3+ions.Temperature-dependent photoluminescence spectra reveal insights into the excitation and emission processes,as well as thermal quenching mechanism.Additionally,the characteristic emissions of Dy3+demonstrate varied anti-thermal quenching behaviors,indicating the remarkable thermal stability of the synthesized crystals.The thermally coupled sublevels of Dy3+ions are employed to develop optical thermometers with notable sensitivity.Finally,the light-emitting diodes fabricated by encapsulating the optimized samples onto commercial chips highlight the great potential of Dy3+-doped Cs2NaLuCl6:Sb3+materials for photoelectric applications. 展开更多
关键词 Metal halide Sb3+ Rare earths Photoluminescence Energy transfer
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Modulating electron density to boost photoluminescence of Eu3+-doped Gd3Ga5O12 garnet by Al3+ion incorporation 认领 引用
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作者 Zhengjie Tian Haiyan Wang +3 位作者 Xiyong Chen Mingjian Yuan Bingsuo Zou Ruosheng Zeng 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第7期2019-2027,I0002,共9页
Rare earth-doped garnet materials are highly promising for applications in solid-state lighting,display,and radiation detection due to their tunable optical properties and excellent thermal stability.However,the radiu... Rare earth-doped garnet materials are highly promising for applications in solid-state lighting,display,and radiation detection due to their tunable optical properties and excellent thermal stability.However,the radius mismatch between rare earth ion and host cation can lead to lattice distortion and defect formation,resulting in low photoluminescence quantum yield(PLQY),which severely limits their practical applications.In this study,a co-doping strategy was employed by introducing smaller Al3+into the Gd3Ga5O12:Eu3+garnet,successfully mitigating the lattice mismatch.It is found that the incorporation of Al3+significantly enhances the photoluminescence efficiency,and the PLQY increases from5.6%to 21.5%.Density functional theory calculations confirm that Al3+does not directly participate in the luminescence process but rather enhances the electron transition probability by modulating charge density,thereby achieving luminescence enhancement.Notably,with Al3+doping,the light-emitting diodes exhibit both high color purity and a 75%improvement in photoelectric conversion efficiency(from 4.23%to 7.41%).This work not only provides new insights into lurninescence regulation in rare earth-doped garnets,also expands the potential for multifunctional applications of garnet materials. 展开更多
关键词 Al3+-doping rare earths Photoluminescence Garnet
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Assessing the photoluminescence of metal nanoclusters:The individual versus the collective 认领 引用
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作者 Xiaoqin Du Peiyao Pan +4 位作者 Haoqi Li Di Zhang Wentao Huang Xi Kang Manzhou Zhu 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第2期559-563,共5页
Understanding the photoluminescence(PL)mechanism of metal nanoclusters from both molecular and supramolecular perspectives is crucial for developing highly emissive cluster-based nanomaterials.In this study,we synthes... Understanding the photoluminescence(PL)mechanism of metal nanoclusters from both molecular and supramolecular perspectives is crucial for developing highly emissive cluster-based nanomaterials.In this study,we synthesized two structurally similar Ag14 nanoclusters with different phosphine stabilizers,which demonstrated opposite PL behaviors in solution and crystalline states.The Ag14 nanocluster stabilized by P(Ph-OMe)3 ligands exhibited a higher PL intensity compared to the one stabilized by P(Ph-F)3 ligands,which was attributed to the stronger electron-donating ability of the P(Ph-OMe)3 ligand that improved ligand-to-metal charge transfer efficiency.In contrast,the P(Ph-F)3 stabilized Ag14 crystals displayed greater PL intensity than the Ag14 cluster crystal with a-OMe surface,which was due to stronger intermolecular interactions within the cluster lattice of the former that limited non-radiative energy loss and thus enhanced PL.Overall,this work aims to promote a comprehensive understanding of the fluorescence in cluster-based nanomaterials,which will be beneficial for their downstream applications. 展开更多
关键词 Nanocluster Photoluminescence Crystal structure Ligand effect Intermolecular interaction
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Halogen substitution strategy for regulating the photoluminescence and dielectric response of ferroelastics 认领 引用
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作者 Zhi-Long Li Hao-Fei Ni +4 位作者 Bo Zhuang Kun Ding Da-Wei Fu Qiang Guo Meng-Meng Lun 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第4期758-762,共5页
Ferroelastics have attracted considerable interest because of their promising uses in areas such as energy conversion,sensing technologies,and beyond.However,exploring ferroelastics with high-temperature dielectric sw... Ferroelastics have attracted considerable interest because of their promising uses in areas such as energy conversion,sensing technologies,and beyond.However,exploring ferroelastics with high-temperature dielectric switching and photoluminescence remains a challenge.Here,we have synthesized two ferroelastics(DMTP)PbBr3(DMTP=N,N-dimethyl-1,2,3,6-tetrahydropyridine)and(DMTP)PbI3 under the guidance of halogen substitution strategy.(DMTP)PbI3 experiences the dielectric switching at 371 K,and upon halogen substitution,the strengthened intermolecular interactions lead to(DMTP)PbBr3 undergoing a similar switching at around 390 K.Additionally,two compounds both emit orange light under ultraviolet illumination.(DMTP)PbI3 has the photoluminescence quantum yield of 2.68%,while(DMTP)PbBr3,due to the increased distortion of the inorganic part after halogen substitution,achieves the higher quantum yield of 12%.This work offers meaningful perspectives on exploring the search for ferroelectrics with photoluminescence and high-temperature dielectric switching,and also demonstrates the rationality of the halogen substitution strategy. 展开更多
关键词 Ferroleastics Halogen substitution Photoluminescence Dielectric response Organic-inorganic hybrid materials
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Excitation-dependent tunable photoluminescence in CsCdCl3 all-inorganic perovskite for anti-counterfeiting 认领 引用
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作者 Guojun Zhou Qiqiong Ren +4 位作者 Yanting Wang Nan Zhang Yilin Mao Pei Wang Xian-Ming Zhang 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2026年第2期36-42,共7页
Developing single-component all-inorganic perovskites with excitation-dependent multicolor emission remains a considerable challenge for next-generation anti-counterfeiting technologies.Herein,we report an excitation-... Developing single-component all-inorganic perovskites with excitation-dependent multicolor emission remains a considerable challenge for next-generation anti-counterfeiting technologies.Herein,we report an excitation-dependent tunable photoluminescence(PL)switching behavior in all-inorganic CsCdCl3perovskite,which ari-ses from its unique structural asymmetry featuring both isolated[CdCl6]4-octahedra(D3d symmetry)and face-sharing[Cd2Cl9]5-dimers(C3v symmetry).This dual-coordination environment facilitates the dual-band emis-sions at 500 and 590 nm,attributed to free exciton(FE)recombination in[CdCl6]4-octahedra and self-trapped exciton(STE)emission from[Cd2Cl9]5-dimers,respectively.The competitive excitation pathways between FE and STE enable the reversible color switching between green and orange emission via excitation-wavelength modulation.The excitation-wavelength sensitivity is governed by the emission intensity ratio,where 254 nm excitation favors the dimer-associated STE emission at 590 nm while 365 nm excitation selectively strengthens the octahedral FE emission at 500 nm.Density functional theory(DFT)calculations confirm the direct bandgap of CsCdCl3(2.62 eV),and elucidate the electronic transition mechanism.The excitation-dependent color-switching capability of CsCdCl3offers promising potential for advanced applications in anti-counterfeiting and information encryption technologies.This work establishes a paradigm for designing single-component emitters with excitation-controlled multicolor PL,thereby unlocking possibilities for developing high-security anti-counterfeiting technologies. 展开更多
关键词 Tunable photoluminescence Self-trapped exciton Free exciton CsCdCl3perovskite Anti-counterfeiting
Quasi 2D Silicon Nanosheet and Polyaniline Nanocomposites:Structural and Photoluminescence Properties 认领 引用
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作者 Debosmita Karar Ashit Kumar Pramanick Mallar Ray 《Journal of Polymer Materials》 SCIE CAS 2026年第2期474-487,共14页
Experimental preparation of graphene like 2D silicon is a great challenge due to the dominant sp3 hybridization in silicon.We have synthesized quasi 2D crystalline silicon nanosheets by topochemical exfoliation of lay... Experimental preparation of graphene like 2D silicon is a great challenge due to the dominant sp3 hybridization in silicon.We have synthesized quasi 2D crystalline silicon nanosheets by topochemical exfoliation of layered Zintl phases,which bear signatures of properties predicted theoretically.Quasi-two-dimensional silicon nanosheets were uniformly dispersed within a conducting polyaniline matrix to fabricate solid-state nanocomposites with varying silicon loadings.The resulting polyaniline-quasi-2D silicon composites were systematically examined for their structural characteristics and optical emission behavior.Notably,the nanocomposites exhibit intense photoluminescence at room temperature,with an emission efficiency significantly higher than that of pristine quasi-2D silicon.The functional characteristics of the nanocomposite can be tailored by adjusting the loading and spatial dispersion of the nanoscale components,the nature of the host matrix,and the interfacial interactions between them.This nanocomposite is a promising candidate for the development of efficient thermoelectric material and has huge potential for applications in electronics and sensing. 展开更多
关键词 2D material silicon nanosheet polyaniline photoluminescence
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Enhancement of ultraviolet upconversion photoluminescence of Y7O6F9:Pr,Gd induced by Li+codoping 认领 引用 被引量：2
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作者 Huaiyong Li Yang Sun +7 位作者 Jinfeng Zhang Ziyi Zhang Yangbo Wang Chengchao Hu Xufeng Zhou Shanshan Du Jigong Hao Wei Li 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第4期684-690,I0002,共7页
Ultraviolet upconversion photoluminescence materials have great potential in various fields,but the improvement of the upconversion efficiency is challenging.Codoping of Li+is considered as an effective strategy an... Ultraviolet upconversion photoluminescence materials have great potential in various fields,but the improvement of the upconversion efficiency is challenging.Codoping of Li+is considered as an effective strategy and widely used to improve the photoluminescence properties of phosphors.In this paper,Li+is introduced into a Y7O6F9:Pr3+,Gd3+system.The effect of Li+codoping on the phase purity,crystal structure,micro structure,downshifting and upconversion photo luminescence as well as the decay dynamic of the phosphors was studied.It is revealed that the overall photoluminescence efficiency and the energy transfer efficiency from pr3+to Gd3+are greatly promoted.The downshifting and upconversion photoluminescence increase by 2.58 and 10 times as 6 mol%of Li+is codoped.The photo luminescence decay dynamic study shows that the 3P0state decays slower in the Li+-containing phosphor than the Li+-free one.The improvement of the photoluminescence properties is due to the increase of the crystallinity and the reduce of the quenching center. 展开更多
关键词 Upconversion Photoluminescence Li+-codoping Oxyfluoride Gadolinium Praseodymium Rare earths
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Dataset for multifrequency terahertz sensing using photoluminescence spectroscopy of Rydberg atom vapor 认领 引用 被引量：2
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作者 Tao Li Xian-Zhe Li +7 位作者 Jun Wan Bin Zhang Xin-Yu Yang Qi-Rong Huang Lie Feng Wei Huang Kai-Qing Zhang Hai-Xiao Deng 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2025年第8期26-33,共8页
There is a growing interest in the rapid assessment of terahertz(THz)spectroscopy owing to its promising application pros-pects in nondestructive testing,security screening,and communication.In this study,we introduce... There is a growing interest in the rapid assessment of terahertz(THz)spectroscopy owing to its promising application pros-pects in nondestructive testing,security screening,and communication.In this study,we introduce a swift characterization method for THz spectroscopy that utilizes a THz-to-optical conversion system in a warm atomic vapor cell.By subtracting the photoluminescence(PL)spectra of cesium atoms with the THz field from those without the THz field,we obtained differential PL spectra that effectively characterized the 0.548 THz field.The differential PL spectra of Rydberg atoms offer the opportunity to quantify the THz field’s intensity and frequency,potentially paving the way for the development of THz spectroscopy based on warm atomic vapor cells. 展开更多
关键词 Terahertz Rydberg state Cesium Photoluminescence spectra
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Magnetic-field-induced photoluminescence enhancement in type-I quantum wells:A quantitative probe for interface flatness 认领 引用
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作者 Jun Shao Man Wang +5 位作者 Xiren Chen Liangqing Zhu F.X.Zha H.Zhao Shumin Wang Wei Lu 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第10期249-260,共12页
Interfacial disorders in semiconductor quantum wells(QWs)determine material properties and device performance and have attracted great research efforts using different experimental methods.However,so far,there has bee... Interfacial disorders in semiconductor quantum wells(QWs)determine material properties and device performance and have attracted great research efforts using different experimental methods.However,so far,there has been no way to quantify the lateral length distribution of the interfacial disorders in QWs.Since photoluminescence(PL)is sensitive to exciton localization,the evolutions of PL energy and linewidth under external perpendicular magnetic fields have served as effective measurement methods for QW analysis;however,the evolution of PL intensity has not played a matching role.In this paper,we develop a theoretical model correlating the PL intensity with the interfacial disorders of type-I QWs under an external perpendicular magnetic field.We verify the model's rationality and functionality using In Ga(N)As/Ga As single QWs.In addition,we derive the Urbach energy and determine the lateral length distribution of interfacial disorders.The results show that the magnetic field-dependent PL intensity,as described by our model,serves as a valid probe for quantifying the interface flatness.The model also reveals that the mechanism of magnetic-field-induced intensity enhancement is a joint effect of interfacial disorder-induced exciton localization and the transfer of excitons from dark to bright states.These insights may benefit performance improvements of type-I QW materials and devices. 展开更多
关键词 photoluminescence type-I quantum wells interfacial disorders magnetic field
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Low-temperature photoluminescence study of optical centers in HPHT-diamonds 认领 引用
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作者 Liangchao Chen Xinyuan Miao +5 位作者 Zhuangfei Zhang Biao Wan Yuewen Zhang Qianqian Wang Longsuo Guo Chao Fang 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第8期202-207,共6页
The properties and creation of optical centers in diamond are essential for applications in quantum technology.Here,we study the photoluminescence(PL)spectroscopy behavior at low temperatures of diamond subjected to e... The properties and creation of optical centers in diamond are essential for applications in quantum technology.Here,we study the photoluminescence(PL)spectroscopy behavior at low temperatures of diamond subjected to electron irradiation and annealing heat treatment.Through temperature variation testing,it was found that the NVcenter intensity of diamond with a nitrogen content of 150 ppm before treatment is insensitive to the experimental temperature,but significantly increases with decreasing temperature after treatment,showing sensitivity to temperature.In addition,the H3 center also shows an increasing trend with decreasing temperature.The results of annealing diamond with a nitrogen content of 730 ppm showed that even at a low temperature of 93 K,no NV-centers were detected,but there were a large number of Ni-N related centers,especially NE8 centers.Our findings can promote a deeper understanding of the behavioral characteristics of HPHT-diamond optical centers in low-temperature environments. 展开更多
关键词 high temperature and high pressure diamond optical centers photoluminescence
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Calcination temperature-dependent structural,optical,and photoluminescence properties of Mg-Al bimetallic oxide prepared by sol-gel auto combustion method 认领 引用
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作者 Thanit Tangcharoen 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2025年第6期2884-2899,共16页
In this research study,magnesium-aluminum(Mg-Al)bimetallic oxide powders are synthesized via the sol-gel auto combustion method using diethanolamine(DEA)as the fuel.In order to subsequently determine the influence of ... In this research study,magnesium-aluminum(Mg-Al)bimetallic oxide powders are synthesized via the sol-gel auto combustion method using diethanolamine(DEA)as the fuel.In order to subsequently determine the influence of calcination temperatures upon the structure,chemical bonding,morphology,optical properties,and fluorescence properties of the as-synthesized and calcined Mg-Al bimetallic oxide powders,the researcher employed X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),transmission electron microscopy(TEM),UV–visible diffuse reflectance spectroscopy(UV-DRS),and photoluminescence spectroscopy(PL),respectively.It was apparent on the basis of the XRD and FT-IR analyses that those powders undergoing calcination at temperatures of 500℃,700℃,and 900℃contained the major phase magnesium aluminate(Mg Al2O4)spinel with trace magnesium oxide(Mg O)and hydrotalcite(Mg6Al2(CO3)(OH)16).When the calcination temperature rose to 1100℃,this resulted in a single phase MgAl2O4while MgO and(Mg6Al2(CO3)(OH)16)were no longer observed.UV-DRS analysis revealed that in optimized conditions,calcination resulted in better sample absorption and reflection levels when compared to the ultraviolet,visible,and infrared spectra observed in the case of the as-synthesized sample.The bandgap energy(Eg)for calcined samples was in the range of 2.65 e V to 5.85 e V,in contrast to the value of 4.10 e V for the as-synthesized sample.Analysis of photoluminescence showed that for the as-synthesized samples and those calcined at low temperatures,visible light was emitted only in the violet,blue,and green regions with low intensity,while for samples calcined at higher temperatures,the emissions showed greater intensity and extended to the yellow and orange regions.Multiple defect centers were found in the bandgap which can explain these findings. 展开更多
关键词 Magnesium Aluminum Bimetallic oxide Sol-gel auto combustion Diethanolamine Photoluminescence
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Ligand rigidity-mediated coordination symmetry engineering in lanthanide-titanium nanoclusters achieves>90%photoluminescence quantum yield 认领 引用 被引量：3
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作者 Xinran Yan Ming Zhao +7 位作者 Feng Jiang Haifeng Zhu Weinan Dong Shengrong He Jingjing Xia Meixin Hong Zhennan Wu Xue Bai 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第8期1590-1600,I0001,共11页
Achieving high-efficiency photoluminescence in trivalent lanthanides(Ln3+)requires precise crystalfield perturbation to overcome parity-forbidden 4f-transitions and suppress nonradiative decay.However,realizing suc... Achieving high-efficiency photoluminescence in trivalent lanthanides(Ln3+)requires precise crystalfield perturbation to overcome parity-forbidden 4f-transitions and suppress nonradiative decay.However,realizing such control remains challenging,even in well-optimized Ln3+ -doped nanocrystals.Here,by exploiting the atomically precise structure of metal nanoclusters,we demonstrate symmetry engineering in the Eu2Ti4 nanoclusters through stepwise ligand substitution(BA/Phen→FBA/Phen→FBA/Bpy.BA:benzoicacid;Phen:1,10-phenanthroline;FBA:p-fluorobenzoicacid;Bpy:2,2'-bipyridine).The incorporation of FBA effectively suppresses nonradiative relaxation,while the flexible Bpy ligand induces symmetry reduction from D2d to C2v through coordination modulation,yielding a high photoluminescence quantum yield(PLQY)of 91.2%in the Ln3+ cluster systems.The transient-absorption,Judd-Ofelt theory,crystal-field analysis,and temperature-dependent photophysical studies elucidated the underlying modulation mechanisms.Furthermore,these clusters exhibit promising potential for optoelectronic applications,offering a new design strategy for high-performance luminescent materials. 展开更多
关键词 Nanoclusters Coordination symmetry Lattice modulation Photoluminescence Rare earths
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Effect of nitrogen incorporation and surface passivation on photoluminescence properties of InAs-based nanowires 认领 引用
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作者 Ratmir Ustimenko Danila Karaulov +5 位作者 Maxim Vinnichenko Ilya Norvatov Andrey Kaveev Vladimir Fedorov Ivan Mukhin Dmitry Firsov 《Journal of Semiconductors》 EI CAS CSCD 2025年第12期102-107,共6页
InAsN nanowires on InAs stems were obtained using plasma-assisted molecular beam epitaxy on a SiOx/Si(111)sub-strate.Also,heterostructured InAs/InAsN and InAsN/InP nanowires were grown in the core/shell geometry.In th... InAsN nanowires on InAs stems were obtained using plasma-assisted molecular beam epitaxy on a SiOx/Si(111)sub-strate.Also,heterostructured InAs/InAsN and InAsN/InP nanowires were grown in the core/shell geometry.In the low-temperature photoluminescence spectra of the grown structures,spectral features are observed that correspond to the polytypic structure of nanowires with a predominance of the wurtzite phase and parasitic islands of the sphalerite phase.It was shown that the interband photoluminescence spectral features of InAsN nanowires experience a red shift relative to the pristine InAs nanowires.The incorporation of nitrogen reduces the bandgap by splitting the conduction band into two subbands.The position of the spectral features in the photoluminescence spectra confirms the formation of a nitride solid solution with a poly-typic hexagonal structure,having a concentration of nitrogen atoms of up to 0.7%.Additional passivation of the nanowire surface with InP leads to a decrease in the intensity of nonradiative recombination and an improvement in the photoluminescent response of the nanowires,which makes it possible to detect photoluminescence emission at room temperature.Thus,by changing the composition and morphology of nanowires,it is possible to control their electronic structure,which allows varying the operating range of detectors and mid-IR radiation sources based on them. 展开更多
关键词 nanowires photoluminescence InAsN InAs InP core/shell passivation
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Photoluminescence upgradation of La2MgTiO6:2%Dy3+ perovskite with monovalent(Li+),divalent(Ba2+,Sr2+) and trivalent(Bi3+,Sm3+)cation sensitization 认领 引用
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作者 V.P.Veena K.Arun +2 位作者 C.K.Shilpa S.V.Jasira K.M.Nissamudeen 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第1期47-56,I0002,共10页
Nano phosphors of 2%Dy3+(wt%)doped La2MgTiO6 and monovalent/divalentrivalent co-doped La1.98Dy0.02MgTiO6:x%Ay+(Ay+:Li+,Ba2+,Sr2+,Bi3+,and Sm3+;0≤x≤2 wt%)were synthesized by combus... Nano phosphors of 2%Dy3+(wt%)doped La2MgTiO6 and monovalent/divalentrivalent co-doped La1.98Dy0.02MgTiO6:x%Ay+(Ay+:Li+,Ba2+,Sr2+,Bi3+,and Sm3+;0≤x≤2 wt%)were synthesized by combustion method.From the XRD data,it is deduced that an increase in the valency of co-dopant increases the crystallinity of the double perovskite orthorhombic nanocrystal structure.With an increase in co-dopant size,an elevation in optical bandgap is visible with the highest bandgap of 3.835 eV for Bi3+.The photo-absorption is monotonically broadened for Sr2+,Sm3+,and Li+around 200-450 nm.Under351 nm,Dy3+triggered lattice shows major characteristic emission peaks at 480 nm(4F9/2→6H15/2),574 nm(4F9/2→6H13/2),and 670 nm(4F9/2→6H11/2).leading to near white light emission with CIE coordinates(0.341,0.376).Upon co-doping,the PL intensity is significantly increased with maximum emission for trivalent Sm3+,followed by divalent Sr2+and monovalent Li+respectively.With increasing excitation wavelength,Sr2+shows a dominated output and it is found that divalent Sr2+is a potential codopant that could enhance luminescence intensity up to 6 times with a Sr2+→Dy3+energy transfer efficiency of 86%.It is specified that the CIE coordinates of Li+co-doped samples show ideal white emission with color coordinates(0.333,0.336).The concluding outcomes signify the noblest rare earth Sm3+co-doping and thus Sm3+→Dy3+energy transfer mechanism is discussed in detail. 展开更多
关键词 Photoluminescence Perovskite WLED Co-doping Rareearths
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Broadband photoluminescence and nonlinear chiroptical properties in chiral 2D halide perovskites 认领 引用
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作者 Dezhong Hu Zhen Zhang +2 位作者 Kaixuan Zhang Qian He Weijie Zhao 《Journal of Semiconductors》 EI CAS CSCD 2025年第7期79-86,共8页
Two-dimensional(2D)chiral halide perovskites(CHPs)have attracted broad interest due to their distinct spin-dependent properties and promising applications in chiroptics and spintronics.Here,we report a new type of 2D ... Two-dimensional(2D)chiral halide perovskites(CHPs)have attracted broad interest due to their distinct spin-dependent properties and promising applications in chiroptics and spintronics.Here,we report a new type of 2D CHP single crystals,namely R/S-3BrMBA2PbBr4.The chirality of the as-prepared samples is confirmed by exploiting circular dichroism spectroscopy,indicating a successful chirality transfer from chiral organic cations to their inorganic perovskite sublattices.Furthermore,we observed bright photoluminescence spanning from 380 to 750 nm in R/S-3BrMBA2PbBr4crystals at room temperature.Such broad photoluminescence originates from free excitons and self-trapped excitons.In addition,efficient second-harmonic generation(SHG)performance was observed in chiral perovskite single crystals with high circular polarization ratios and non-linear optical circular dichroism.This demonstrates that R/S-3BrMBA2PbBr4crystals can be used to detect and generate left-and righthanded circularly polarized light.Our study provides a new platform to develop high-performance chiroptical and spintronic devices. 展开更多
关键词 chiral halide perovskites circular dichroism self-trapped excitons photoluminescence second-harmonic generation
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Boosting photoluminescence efficiency and stability of Mn2+-doped CsPbCl3 perovskite nanocrystals via europium ion codoping 认领 引用
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作者 Zhuwei Gu Ke Xing +2 位作者 Sheng Cao Bingsuo Zou Jialong Zhao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2025年第9期1835-1843,共9页
Mn2+-doped CsPbCl3(Mn2+:CsPbCl3) nanocrystals(NCs) have attracted considerable attention due to their unique strong and broad orange-red emission band,presenting promising applications in the field of phot... Mn2+-doped CsPbCl3(Mn2+:CsPbCl3) nanocrystals(NCs) have attracted considerable attention due to their unique strong and broad orange-red emission band,presenting promising applications in the field of photoelectric devices.However,pristine Mn2+:CsPbCl3NCs commonly suffer from low photoluminescence quantum yield(PL QY) and stability issues.Herein,we introduced europium ions(Eu3+)into Mn2+:CsPbCl3NCs via the thermal injection synthesis method to obtain high performance Eu3+and Mn2+codoped CsPbCl3(Eu3+/Mn2+:CsPbCl3) NCs.The maximum PL QY of the resulting Eu3+/Mn2+:CsPbCl3NCs reaches up to 90.92%.It is found that the doping of Eu3+ions significantly reduces the non-radiative recombination caused by high defect states,and improves the energy transfer efficiency from exciton to Mn2+,thereby boosting the PL performance.Moreover,doping Eu3+ions notably improves the UV-light and water stability of Mn2+:CsPbCl3NCs.We further demonstrate the application versatility of Eu3+/Mn2+:CsPbCl3NCs in white light emitting diodes(WLEDs) and optical anticounterfeiting applications.This work provides a valuable perspective for the attainment of high performance Mn2+:CsPbCl3NCs and lays a foundation for the codoping of other lanthanide ions to adjust the luminescence properties of Mn2+:CsPbCl3NCs. 展开更多
关键词 CsPbCl3 Mn doped Eu^(3+)ions Photoluminescence quantum yield Stability Rare earths
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Structural and band tail state photoluminescence properties of amorphous SiC films with different amounts of carbon 认领 引用 被引量：5
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作者 傅广生 王新占 +3 位作者 路万兵 戴万雷 李兴阔 于威 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第10期472-477,共6页
Amorphous silicon carbide films are deposited by the plasma enhanced chemical vapour deposition technique,and optical emissions from the near-infrared to the visible are obtained.The optical band gap of the films incr... Amorphous silicon carbide films are deposited by the plasma enhanced chemical vapour deposition technique,and optical emissions from the near-infrared to the visible are obtained.The optical band gap of the films increases from 1.91 eV to 2.92 eV by increasing the carbon content,and the photoluminescence（PL） peak shifts from 1.51 eV to 2.16 eV.The band tail state PL mechanism is confirmed by analysing the optical band gap,PL intensity,the Stocks shift of the PL,and the Urbach energy of the film.The PL decay times of the samples are in the nanosecond scale,and the dependence of the PL lifetime on the emission energy also supports that the optical emission is related to the radiative recombination in the band tail state. 展开更多
关键词 amorphous silicon carbide band tail state photoluminescence time-resolved photoluminescence
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Fabrication and temperature-dependent photoluminescence spectra of Zn–Cu–In–S quaternary nanocrystals 认领 引用 被引量：1
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作者 刘晓娟 张晓松 +2 位作者 李岚 王雪亮 苑琳琳 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第11期566-571,共6页
A series of Zn-Cu-In-S nanocrystals （ZCIS NCs） are prepared and the optical properties of the ZCIS NCs are tuned by adjusting the reaction time. It is interesting to observe that the temperature-dependent photolumin... A series of Zn-Cu-In-S nanocrystals （ZCIS NCs） are prepared and the optical properties of the ZCIS NCs are tuned by adjusting the reaction time. It is interesting to observe that the temperature-dependent photoluminescence （PL） spectra of the ZCIS NCs show a redshift with decreasing intensity at low temperature （50-280 K） and a blueshift at high temperature （318--403 K）. The blueshift can be explained by the thermally active phonon-assisted tunneling from the excited states of the low-energy emission band to the excited states of the high-energy emission band. 展开更多
关键词 temperature-dependent photoluminescence photoluminescence lifetime quaternary nanocrystals white light emitting device
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