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Defect passivation of CsPbI2Br perovskites through Zn(II) doping: toward efficient and stable solar cells
Lu, Jiajun; Chen, Shan-Ci; Zheng, Qingdong
2019-08-01
Source PublicationSCIENCE CHINA-CHEMISTRY
ISSN1674-7291
Volume62Issue:8Pages:1044
SubtypeArticle
AbstractDefect passivation is an important strategy to achieve perovskite solar cells (PVSCs) with enhanced power conversion efficiencies (PCEs) and improved stability because the trap states induced by defects in the interfaces and grain boundaries of perovskites are harmful to both large open circuit voltage and high photocurrent of devices. Here, zinc cations (Zn2+) were used as a dopant to passivate defects of the CsPbI2Br perovskite leading to Zn2+-doped CsPbI2Br film with fewer trap states, improved charge transportation, and enhanced light-harvesting ability. Thus, the best-performance PVSC based on CsPbI2Br with the optimal Zn2+ doping shows a higher PCE of 12.16% with a larger open-circuit voltage (V-OC) of 1.236 V, an improved shortcircuit current (J(SC)) of 15.61 mA cm(-2) in comparison with the control device based on the pure CsPbI2Br which exhibits a PCE of 10.21% with a V-OC of 1.123 V, a J(SC) of 13.27 mA cm(-2). Time-resolved photoluminescence results show that the Zn2+ doping leads to perovskite film with extended photoluminescence lifetime which means a longer diffusion length and subsequently enhanced photocurrent and open circuit voltage. This work provides a simple strategy to boost the performance of PVSCs through Zn2+ doping.
KeywordCsPbI2Br perovskites defect passivation Zn(II) doping all-inorganic perovskite solar cells power conversion efficiency
DOI10.1007/s11426-019-9486-0
Language英语
WOS Research AreaChemistry
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/26941
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Lu, Jiajun,Chen, Shan-Ci,Zheng, Qingdong. Defect passivation of CsPbI2Br perovskites through Zn(II) doping: toward efficient and stable solar cells[J]. SCIENCE CHINA-CHEMISTRY,2019,62(8):1044.
APA Lu, Jiajun,Chen, Shan-Ci,&Zheng, Qingdong.(2019).Defect passivation of CsPbI2Br perovskites through Zn(II) doping: toward efficient and stable solar cells.SCIENCE CHINA-CHEMISTRY,62(8),1044.
MLA Lu, Jiajun,et al."Defect passivation of CsPbI2Br perovskites through Zn(II) doping: toward efficient and stable solar cells".SCIENCE CHINA-CHEMISTRY 62.8(2019):1044.
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