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Extra long electron-hole diffusion lengths in CH3NH3PbI3-xClx perovskite single crystals
Zhang, Fengying1,2; Yang, Bin2,3; Li, Yajuan2,3; Deng, Weiqiao2,3; He, Rongxing1
Source PublicationJOURNAL OF MATERIALS CHEMISTRY C
2017-09-07
DOI10.1039/c7tc02802d
Volume5Issue:33Pages:8431-8435
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS Research AreaMaterials Science ; Physics
WOS KeywordINVERSE TEMPERATURE CRYSTALLIZATION ; TOTAL-ENERGY CALCULATIONS ; LEAD IODIDE PEROVSKITES ; WAVE BASIS-SET ; HALIDE PEROVSKITES ; SOLAR-CELLS ; SOLUTION GROWTH ; EFFICIENCY ; TRANSPORT ; CHLORIDE
AbstractLong 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.
Language英语
WOS IDWOS:000408413600013
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/149975
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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.
APA Zhang, Fengying,Yang, Bin,Li, Yajuan,Deng, Weiqiao,&He, Rongxing.(2017).Extra long electron-hole diffusion lengths in CH3NH3PbI3-xClx perovskite single crystals.JOURNAL OF MATERIALS CHEMISTRY C,5(33),8431-8435.
MLA Zhang, Fengying,et al."Extra long electron-hole diffusion lengths in CH3NH3PbI3-xClx perovskite single crystals".JOURNAL OF MATERIALS CHEMISTRY C 5.33(2017):8431-8435.
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