Phenylformamidinium-enabled quasi-2D Ruddlesden-Popper perovskite solar cells with improved stability

doi:10.1016/j.jechem.2021.09.026

	Phenylformamidinium-enabled quasi-2D Ruddlesden-Popper perovskite solar cells with improved stability
	Li, Xingcheng 2; Hu, Wanpei 2; Shang, Yanbo 2; Yu, Xin 2; Wang, Xue 2; Zhou, Weiran 2; Wang, Mingtai 1; Luo, Qun 3; Ma, Chang-Qi 3; Lu, Yalin 2
刊名	JOURNAL OF ENERGY CHEMISTRY
	2022-03-01
卷号	66
关键词	Perovskite solar cells Organic spacer Formamidinium Ruddlesden-Popper Quasi-2D perovskite
ISSN号	2095-4956
DOI	10.1016/j.jechem.2021.09.026
通讯作者	Yang, Shangfeng(sfyang@ustc.edu.cn)
英文摘要	Two-dimensional (2D)/quasi-2D perovskite solar cells (PSCs) incorporating organic spacer cations exhibit appealing ambient stability in comparison with their 3D analogs. Most reported organic spacer cations are based on ammonium, whereas formamidinium (FA(+)) has been seldom applied despite that FA has been extensively used in high-efficiency 3D PSCs. Herein, a novel FA-based organic spacer cation, 4-chloro-phenylformamidinium (CPFA(+)), is applied in quasi-2D Ruddlesden-Popper (RP) PSCs for the first time, and methylammonium chloride (MACl) is employed to promote crystal growth and orientation of perovskite film, resulting in high power conversion efficiency (PCE) with improved stability. Upon incorporating CPFA(+) organic spacer cation and MACl additive, high-quality quasi-2D CPFA(2)MA(n-1)Pb(n)(I0.857Cl0.143)(3n+1) (n = 9) perovskite film forms, exhibiting improved crystal orientation, reduced trap state density, prolonged carrier lifetime and optimized energy level alignment. Consequently, the CPFA(2)MA(n-1)Pbn(I0.857Cl0.143)(3n+1) (n = 9) quasi-2D RP PSC devices deliver a highest PCE of 14.78%. Moreover, the un-encapsulated CPFA-based quasi-2D RP PSC devices maintain similar to 80% of its original PCE after exceeding 2000 h storage under ambient condition, whereas the 3D MAPbI(3) counterparts retain only similar to 45% of its original PCE. Thus, the ambient stability of quasi-2D RP PSC devices is improved obviously relative to its 3D MAPbI(3) counterpart. (C) 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
资助项目	National Key Research and Development Program of China[2017YFA0402800] ; National Natural Science Foundation of China[51925206] ; National Natural Science Foundation of China[U1932214]
WOS关键词	EFFICIENCY ; SPACER
WOS研究方向	Chemistry ; Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000744271300009
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127345]
专题	中国科学院合肥物质科学研究院
通讯作者	Yang, Shangfeng
作者单位	1.Chinese Acad Sci, Inst Appl Technol, Hefei Inst Phys Sci, Hefei 230088, Anhui, Peoples R China 2.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei Natl Lab Phys Sci Microscale, CAS Key Lab Mat Energy Convers,Anhui Lab Adv Phot, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, I Lab, Suzhou 215123, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Li, Xingcheng,Hu, Wanpei,Shang, Yanbo,et al. Phenylformamidinium-enabled quasi-2D Ruddlesden-Popper perovskite solar cells with improved stability[J]. JOURNAL OF ENERGY CHEMISTRY,2022,66.
APA	Li, Xingcheng.,Hu, Wanpei.,Shang, Yanbo.,Yu, Xin.,Wang, Xue.,...&Yang, Shangfeng.(2022).Phenylformamidinium-enabled quasi-2D Ruddlesden-Popper perovskite solar cells with improved stability.JOURNAL OF ENERGY CHEMISTRY,66.
MLA	Li, Xingcheng,et al."Phenylformamidinium-enabled quasi-2D Ruddlesden-Popper perovskite solar cells with improved stability".JOURNAL OF ENERGY CHEMISTRY 66(2022).