Defect passivation of CsPbI2Br perovskites through Zn(II) doping: toward efficient and stable solar cells

doi:10.1007/s11426-019-9486-0

	Defect passivation of CsPbI2Br perovskites through Zn(II) doping: toward efficient and stable solar cells
	Lu, Jiajun; Chen, Shan-Ci; Zheng, Qingdong
刊名	SCIENCE CHINA-CHEMISTRY
	2019-08-01
卷号	62 期号:8 页码:1044
关键词	CsPbI2Br perovskites defect passivation Zn(II) doping all-inorganic perovskite solar cells power conversion efficiency
ISSN号	1674-7291
DOI	10.1007/s11426-019-9486-0
文献子类	Article
英文摘要	Defect 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.
WOS研究方向	Chemistry
语种	英语
出版者	SCIENCE PRESS
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26941]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 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.