Surface Passivation of All-Inorganic CsPbI2Br with a Fluorinated Organic Ammonium Salt for Perovskite Solar Cells with Efficiencies over 16%
2020-10
发表期刊SOLAR RRL (IF:6.0[JCR-2023],6.4[5-Year])
ISSN2367-198X
卷号4期号:10
发表状态已发表
DOI10.1002/solr.202000321
摘要

Surface modification is demonstrated as an efficient strategy to enhance the efficiency and stability of perovskite solar cells (PVSCs). Fluorinated organic ammonium salts featuring a strong hydrophobic nature are seldom used as passivation agents for the surface modification of CsPbI2Br perovskites. Herein, a fluorinated organic ammonium halide salt, 4-trifluoromethyl phenethylammonium iodide (CFPEAI), is incorporated into the surface of CsPbI2Br perovskite for the first time. After the CFPEAI modification, the defects of CsPbI2Br perovskite are significantly passivated with reduced trap densities. The best-performance PVSC with CFPEAI modification shows an excellent power conversion efficiency (PCE) of 16.07% with a high fill factor (FF) of 84.65%, a short-circuit current density (J(SC)) of 15.45 mA cm(-2), and an open-circuit voltage (V-OC) of 1.23 V. In contrast, the control PVSCs without the surface modification exhibit a lower PCE of 14.50% with a FF of 80.56%, aJ(SC)of 15.05 mA cm(-2), and aV(OC)of 1.20 V. With CFPEAI passivation, the CsPbI2Br perovskite film exhibits enhanced hydrophobicity, thereby leading to improved stability for the corresponding PVSC in comparison with the control PVSC without any surface modification.

关键词defect passivations energy-conversion fluorides perovskites surface modifications
收录类别SCI ; SCIE ; EI
语种英语
资助项目National Natural Science Foundation of China[U1605241] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH032]
WOS研究方向Energy & Fuels ; Materials Science
WOS类目Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号WOS:000556247700001
出版者WILEY-V C H VERLAG GMBH
EI主题词Perovskite solar cells
WOS关键词ENHANCED PERFORMANCE ; DEFECT PASSIVATION ; HYBRID PEROVSKITES ; STABILITY ; CATION
原始文献类型Article
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文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/122931
专题物质科学与技术学院_硕士生
物质科学与技术学院_博士生
通讯作者Zheng, Qingdong
作者单位
1.Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, 155 Yangqiao West Rd, Fuzhou 350002, Fujian, Peoples R China
2.ShanghaiTech Univ, Sch Phys Sci & Technol, 100 Haike Rd, Shanghai 201210, Peoples R China
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GB/T 7714
Chen, Shan-Ci,Wang, Di,Zheng, Qingdong. Surface Passivation of All-Inorganic CsPbI2Br with a Fluorinated Organic Ammonium Salt for Perovskite Solar Cells with Efficiencies over 16%[J]. SOLAR RRL,2020,4(10).
APA Chen, Shan-Ci,Wang, Di,&Zheng, Qingdong.(2020).Surface Passivation of All-Inorganic CsPbI2Br with a Fluorinated Organic Ammonium Salt for Perovskite Solar Cells with Efficiencies over 16%.SOLAR RRL,4(10).
MLA Chen, Shan-Ci,et al."Surface Passivation of All-Inorganic CsPbI2Br with a Fluorinated Organic Ammonium Salt for Perovskite Solar Cells with Efficiencies over 16%".SOLAR RRL 4.10(2020).
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