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Quantum well engineering in quasi-2D perovskites unlocks efficiency-stability synergy for photovoltaics 认领 引用
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作者 Jingwei Mao Yi Wei +7 位作者 Ying Ding Yufeng Liu Junhui Wang Kaifeng Wu Zijian Deng Ze Yu Yefu Liu Huolin Huang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第12期1042-1051,I0022,共10页
Quasi-2D perovskites offer enhanced stability for photovoltaic applications but suffer from compromised charge transport due to uncontrolled phase separation and nonideal quantum well(QW)distribution.Contrary to the p... Quasi-2D perovskites offer enhanced stability for photovoltaic applications but suffer from compromised charge transport due to uncontrolled phase separation and nonideal quantum well(QW)distribution.Contrary to the prevailing belief that maximizing 3D-like phases optimizes performance,we demonstrate that strategic narrowing QW distribution into high-n phases while avoiding undesirable graded configurations(common in quasi-2D systems)unlocks unprecedented efficiency-stability synergy.Using 1,4-cyclohexanedimethanamine(CDMA)as a crystallization-directing spacer,we realize three advances.(a)High-n phases with minimized n-value dispersion establish a uniform energy landscape,significantly reducing interphase charge transfer barriers and suppressing voltage losses.(b)Lattice matching between adjacent high-n phases substantially alleviates microstrain accumulation,thereby mitigating defect generation and non-radiative recombination.(c)Strategic predominance of robust high-n phases achieves dual optimization:it excludes hygroscopic 3D-like phases and eliminates mobility-limiting lown phases,thereby ensuring efficient charge dynamics while fortifying the perovskite's intrinsic phase stability.The synergy of these advances enables the CDMA PSCs to achieve a champion efficiency of 19.02%,making them among the highest-efficiency quasi-2D DJ PSCs.The unencapsulated device demonstrated remarkable stability,maintaining 92%of its initial PCE after 5000 h in air.This work redefines phase engineering priorities,demonstrating that manipulating QW distribution in quasi-2D perovskites has the potential to address the efficiency-stability trade-off. 展开更多
关键词 Quasi-2D perovskites Distribution of quantum wells Carrier transport Strain Stability
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Influence of O-O formation pathways and charge transfer mediator on lipid bilayer membrane-like photoanodes for water oxidation 认领 引用 被引量：1
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作者 Yingzheng Li Shaoqi Zhan +9 位作者 Zijian Deng Meng Chen Yilong Zhao Chang Liu Ziqi Zhao Hongxia Ning Wenlong Li Fei Li Licheng Sun Fusheng Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第6期526-537,I0013,共12页
Inspired by the function of crucial components in photosystemⅡ(PSⅡ),electrochemical and dyesensitized photoelectrochemical(DSPEC)water oxidation devices were constructed by the selfassembly of well-designed amphipat... Inspired by the function of crucial components in photosystemⅡ(PSⅡ),electrochemical and dyesensitized photoelectrochemical(DSPEC)water oxidation devices were constructed by the selfassembly of well-designed amphipathic Ru(bda)-based catalysts(bda=2,2'-bipyrdine-6,6'-dicarbonoxyl acid)and aliphatic chain decorated electrode surfaces,forming lipid bilayer membrane(LBM)-like structures.The Ru(bda)catalysts on electrode-supported LBM films demonstrated remarkable water oxidation performance with different O-O formation mechanisms.However,compared to the slow charge transfer process,the O-O formation pathways did not determine the PEC water oxidation efficiency of the dyesensitized photoanodes,and the different reaction rates for similar catalysts with different catalytic paths did not determine the PEC performance of the DSPECs.Instead,charge transfer plays a decisive role in the PEC water oxidation rate.When an indolo[3,2-b]carbazole derivative was introduced between the Ru(bda)catalysts and aliphatic chain-modified photosensitizer in LBM films,serving as a charge transfer mediator for the tyrosine-histidine pair in PSⅡ,the PEC water oxidation performance of the corresponding photoanodes was dramatically enhanced. 展开更多
关键词 Water oxidation Rate determine step Dye-sensitized photoelectrochemical cell Charge transfer Artificial photosynthesis
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Gold nanoflowers for 3D volumetric molecular imaging of tumors by photoacoustic tomography 认领 引用 被引量：7
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作者 Yuanyuan Jiang Zijian Deng +5 位作者 Dan Yang Xin Deng Qi Li Yinlin Sha Changhui Li Dongsheng Xu 《Nano Research》 SCIE CSCD 2015年第7期2152-2161,共10页
By binding molecular probes that target tumor cells, gold nanoparticles （AuNPs） with superior characteristics have shown great potential in tumor molecular imaging studies. The non-invasive, high-resolution, and thr... By binding molecular probes that target tumor cells, gold nanoparticles （AuNPs） with superior characteristics have shown great potential in tumor molecular imaging studies. The non-invasive, high-resolution, and three-dimensional imaging of the targeted AuNPs within the tumor is desirable for both diagnosis and therapy. In this study, gold nanoflowers （AuNFs） are presented as a novel contrast agent for photoacoustic tomography （PAT）. By binding to folic acid, the molecular probe, the tail-vein injected AuNFs concentrated within the tumor site in mice; this was clearly visualized by three-dimensional （3D） PAT imaging. In addition, toxicity assay proved that AuNFs were harmless to living cells and animals. Our results demonstrate that AuNFs have great potential in tumor molecular imaging. 展开更多
关键词 nanoparticles,gold nanoflowers,contrast agents,photoacoustic tomography tumor imaging,molecular imaging
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Erratum to: Gold nanoflowers for 3D volumetric molecular imaging of tumors by photoacoustic tomography 认领 引用
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作者 Yuanyuan Jiang Zijian Deng +5 位作者 Dan Yang Xin Deng Oi Li Yinlin Sha Changhui Li Dongsheng Xu 《Nano Research》 SCIE EI CSCD 2017年第3期1104-1104,共1页
The original version of this article unfortunately missed acknowledgements part. The acknowledgements are as below.
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