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DOI	10.1016/j.scib.2020.05.031
	Identifying the functional groups effect on passivating perovskite solar cells
	Xie J.; Yan K.; Zhu H.; Li G.; Wang H.; Zhu H.; Hang P.; Zhao S.; Guo W.; Ye D.; Shao L.; Guan X.; Ngai T.; Yu X.; Xu J.
发表日期	2020
ISSN	20959273
起始页码	1726
结束页码	1734
卷号	65 期号:20
英文摘要	Many organic molecules with various functional groups have been used to passivate the perovskite surface for improving the efficiency and stability of perovskite solar cell (PSCs). However, the intrinsic attributes of the passivation effect based on different chemical bonds are rarely studied. Here, we comparatively investigate the passivation effect among 12 types of functional groups on para-tert-butylbenzene for PSCs and find that the open circuit voltage (VOC) tends to increase with the chemical bonding strength between perovskite and these passivation additive molecules. Particularly, the para-tert-butylbenzoic acid (tB-COOH), with the extra intermolecular hydrogen bonding, can stabilize the surface passivation of perovskite films exceptionally well through formation of a crystalline interlayer with water-insoluble property and high melting point. As a result, the tB-COOH device achieves a champion power conversion efficiency (PCE) of 21.46%. More importantly, such devices, which were stored in ambient air with a relative humidity of ≃45%, can retain 88% of their initial performance after a testing period of more than 1 year (10,080 h). This work provides a case study to understand chemical bonding effects on passivation of perovskite. © 2020 Science China Press
关键词	Chemical bonding Functional groups Hydrogen bonding Perovskite solar cell Surface passivation
英文关键词	Bond strength (chemical); Efficiency; Hydrogen bonds; Molecules; Open circuit voltage; Passivation; Perovskite; Crystalline interlayer; High melting point; Intermolecular hydrogen bonding; Organic molecules; Passivation effect; Power conversion efficiencies; Surface passivation; Tert-butylbenzene; Perovskite solar cells
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207244
作者单位	School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, 510006, China; Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong, 999077, Hong Kong; College of Material Science and Technology, China University of Petroleum, Qingdao, 266580, China; College of Science and Information, Qingdao Agricultural University, Qingdao, 266109, China; Department of Physics, The Chinese University of Hong Kong, Hong Kong, 999077, Hong Kong; State Key Laboratory of Silicon Materials and School of Materials Science & Engineering, Zhejiang University, Hangzhou, 310027, China; Department of Chemistry, The Chinese University of Hong Kong, Hong Kong, 999077, Hong Kong; School of Materials, Sun Yat-sen University, Guangzhou, 510275, China
推荐引用方式 GB/T 7714	Xie J.,Yan K.,Zhu H.,et al. Identifying the functional groups effect on passivating perovskite solar cells[J],2020,65(20).
APA	Xie J..,Yan K..,Zhu H..,Li G..,Wang H..,...&Xu J..(2020).Identifying the functional groups effect on passivating perovskite solar cells.Science Bulletin,65(20).
MLA	Xie J.,et al."Identifying the functional groups effect on passivating perovskite solar cells".Science Bulletin 65.20(2020).