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Fluorescence Enhancement of Metal-Capped Perovskite CH3NH3PbI3 Thin Films 被引量:1
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作者 Peng Sun Wei-Wei Yu +7 位作者 Xiao-Hang Pan Wei Wei Yan Sun Ning-Yi Yuan Jian-Ning Ding Wen-Chao Zhao Xin Chen Ning Dai 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第9期78-81,共4页
We fabricate nano-structural metal films to improve photoluminescence of perovskite films. When the perovskite film is placed on an ammonia-treated alumina film, stronger photoluminescence is found due to local field ... We fabricate nano-structural metal films to improve photoluminescence of perovskite films. When the perovskite film is placed on an ammonia-treated alumina film, stronger photoluminescence is found due to local field en- hancement effects. In addition, the oxide spacer layer between the metal (e.g., AI, Ag and Au) substrate and the perovskite film plays an important role. The simulations and experiments imply that the enhancement is related to surface plasmons of nano-structural metals. 展开更多
关键词 In Al Fluorescence Enhancement of Metal-Capped Perovskite ch3nh3pbi3 Thin films NH ch
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不同湿度环境下CH3NH3PbI3薄膜的退化过程
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作者 高晓赫 马晓燕 +4 位作者 谷雨 赵明明 张玮 党伟 袁小先 《河北大学学报(自然科学版)》 CAS 北大核心 2019年第4期353-358,共6页
实验分析了在15%、50%和90%RH湿度条件下CH3NH3PbI3薄膜退化过程.通过XRD测量发现不同湿度环境中CH3NH3PbI3薄膜的退化产物为PbI2,且在90%相对湿度(RH)环境下还观测到了退化中间产物水合物(CH3NH3)4PbI6·2H2O.不同湿度环境中CH3NH3... 实验分析了在15%、50%和90%RH湿度条件下CH3NH3PbI3薄膜退化过程.通过XRD测量发现不同湿度环境中CH3NH3PbI3薄膜的退化产物为PbI2,且在90%相对湿度(RH)环境下还观测到了退化中间产物水合物(CH3NH3)4PbI6·2H2O.不同湿度环境中CH3NH3PbI3薄膜退化速度不同,湿度越大,退化速度越快.通过载流子动力学的测量发现随着退化时间增长,CH3NH3PbI3薄膜光生载流子数量不断减小.低湿度环境下CH3NH3PbI3薄膜在退化过程中表现出缺陷钝化现象,载流子复合寿命随退化时间呈先上升后下降趋势.而在高湿度条件下,CH3NH3PbI3薄膜出现缺陷增加现象,载流子复合寿命随退化时间呈下降趋势. 展开更多
关键词 ch3nh3pbi3薄膜 退化过程 相对湿度
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Green antisolvent additive engineering to improve the performance of perovskite solar cells 被引量:1
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作者 Jiahui Li Xiaodong Hua +6 位作者 Fei Gao Xiaodong Ren Chaoqun Zhang Yu Han Yuanrui Li Bonan Shi Shengzhong(Frank)Liu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第3期1-8,I0001,共9页
High-quality perovskite films with larger grain size and fewer defects is a prerequisite for highperformance perovskite solar cells(PSCs).Antisolvent-assisted crystallization is an effective approach to obtain compact... High-quality perovskite films with larger grain size and fewer defects is a prerequisite for highperformance perovskite solar cells(PSCs).Antisolvent-assisted crystallization is an effective approach to obtain compact and uniform perovskite films;however,the majority of antisolvents currently applied have strong toxicity,and the control of perovskite crystallization is not easy through single antisolvent.In this work,a green antisolvent of ethyl acetate(EA)with acetylacetone(AA)additive is used to fine-tune perovskite crystallization and passivate defect,which produces uniform and compact CH;NH;PbI;perovskite films having larger grain and fewer grain boundaries and reduced defect density.Meanwhile,the interfacial hydrophobic characteristic of the perovskite films is enhanced.At the optimized concentration of AA in EA,the power conversion efficiency(PCE)of the CH;NH;PbI;PSCs was improved from 19.2%to 21.1%and their stability in air was also enhanced.These results present a green antisolvent additive engineering strategy to enhance the crystallinity,passivate defects,and fabricate efficient and stable PSCs. 展开更多
关键词 ch3nh3pbi3 films ANTISOLVENT ADDITIVE Defect passivation Perovskite solar cells
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