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题名: Extra long electron-hole diffusion lengths in CH3NH3PbI3-xClx perovskite single crystals
作者: Zhang, Fengying1, 2;  Yang, Bin2, 3;  Li, Yajuan2, 3;  Deng, Weiqiao2, 3;  He, Rongxing1
刊名: JOURNAL OF MATERIALS CHEMISTRY C
发表日期: 2017-09-07
DOI: 10.1039/c7tc02802d
卷: 5, 期:33, 页:8431-8435
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Materials Science, Multidisciplinary ;  Physics, Applied
研究领域[WOS]: Materials Science ;  Physics
英文摘要: Long electron-hole diffusion lengths in organolead trihalide compounds play a key role in achieving the remarkable performance of perovskite photovoltaics. Diffusion lengths in solution-grown CH3NH3PbI3 single crystals have been found to be greater than 175 micrometer (mm). Herein, we report the diffusion lengths in CH3NH3PbI3-xClx single crystals exceeding 380 mm under 1 Sun illumination, which is twice that in CH3NH3PbI3 single crystals. Incorporation of chlorine is found to increase the density of trap-states and reduce the valence band level; these two factors, which dominate the carrier recombination and the charge transfer, respectively, are in a competing relation. As a result, the electron-hole diffusion lengths in a CH3NH3PbI3-xClx single crystal with an optimum Cl proportion (x = 0.005) reach the maximum values. This study provides a strategy for the design of perovskite optoelectronics.
关键词[WOS]: INVERSE TEMPERATURE CRYSTALLIZATION ;  TOTAL-ENERGY CALCULATIONS ;  LEAD IODIDE PEROVSKITES ;  WAVE BASIS-SET ;  HALIDE PEROVSKITES ;  SOLAR-CELLS ;  SOLUTION GROWTH ;  EFFICIENCY ;  TRANSPORT ;  CHLORIDE
语种: 英语
WOS记录号: WOS:000408413600013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149975
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Southwest Univ, Coll Chem & Chem Engn, Minist Educ, Key Lab Luminescence & Real Time Analyt Chem, Chongqing 400715, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
3.Univ Chinese Acad Sci, Beijing 10049, Peoples R China

Recommended Citation:
Zhang, Fengying,Yang, Bin,Li, Yajuan,et al. Extra long electron-hole diffusion lengths in CH3NH3PbI3-xClx perovskite single crystals[J]. JOURNAL OF MATERIALS CHEMISTRY C,2017,5(33):8431-8435.
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