Passivation effect of halogenated benzylammonium as a second spacer cation for improved photovoltaic performance of quasi-2D perovskite solar cells

doi:10.1039/c9ta14139a

	Passivation effect of halogenated benzylammonium as a second spacer cation for improved photovoltaic performance of quasi-2D perovskite solar cells
	Liu, Guozhen 2,3; Xu, Xiao-Xiao 2,3; Xu, Shendong 2,3; Zhang, Liying 2,3; Xu, Huifen 1,2; Zhu, Liangzheng 2; Zhang, Xianxi 4; Zheng, Haiying 1; Pan, Xu 2
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2020-03-28
卷号	8
ISSN号	2050-7488
DOI	10.1039/c9ta14139a
通讯作者	Zheng, Haiying(hyzheng@ahu.edu.cn) ; Pan, Xu(xpan@rntek.cas.cn)
英文摘要	The low photovoltaic performance of 2D perovskites, which is caused by high exciton binding energy and wide band gaps, has limited their further development and applications. Here, we adopted a new-type strategy to obtain high-quality 2-hydroxyethylamine (HEA)-based quasi-2D perovskite films by incorporating halogenated second spacer cations. Due to the effective passivation of halogenated benzylammonium cations with enhanced electronegativity, the mixed quasi-2D perovskites displayed superior crystallinity and reduced internal defects, leading to an enhanced charge transfer and suppressive carrier recombination. As a result, significantly improved power conversion efficiency (PCE) from 15.19% to 18.75% with an enhanced open-circuit voltage (V-oc) and fill factor (FF) was achieved. After aging at 85 degrees C for 200 h and 45 +/- 5% relative humidity (RH) for 1500 h, the unencapsulated optimal devices retained 81% and 90% of the initial PCE, respectively. Our study provides an effective and simple strategy to improve the photovoltaic performance and environmental stability of 2D perovskites for commercial applications.
资助项目	National Key Research and Development Program of China[2016YFA0202401] ; Colleges and Universities in Shandong Province Science and Technology Projects[J17KA097] ; Anhui Provincial Natural Science Foundation[1908085ME152]
WOS关键词	EFFICIENCY ; STABILITY ; TRANSFORMATION
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000526703800007
资助机构	National Key Research and Development Program of China ; Colleges and Universities in Shandong Province Science and Technology Projects ; Anhui Provincial Natural Science Foundation
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103651]
专题	中国科学院合肥物质科学研究院
通讯作者	Zheng, Haiying; Pan, Xu
作者单位	1.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Appl Technol, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.Liaocheng Univ, Sch Chem & Chem Engn, Shandong Prov Key Lab, Collaborat Innovat Ctr Chem Energy Storage & Nove, Liaocheng 252000, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Liu, Guozhen,Xu, Xiao-Xiao,Xu, Shendong,et al. Passivation effect of halogenated benzylammonium as a second spacer cation for improved photovoltaic performance of quasi-2D perovskite solar cells[J]. JOURNAL OF MATERIALS CHEMISTRY A,2020,8.
APA	Liu, Guozhen.,Xu, Xiao-Xiao.,Xu, Shendong.,Zhang, Liying.,Xu, Huifen.,...&Pan, Xu.(2020).Passivation effect of halogenated benzylammonium as a second spacer cation for improved photovoltaic performance of quasi-2D perovskite solar cells.JOURNAL OF MATERIALS CHEMISTRY A,8.
MLA	Liu, Guozhen,et al."Passivation effect of halogenated benzylammonium as a second spacer cation for improved photovoltaic performance of quasi-2D perovskite solar cells".JOURNAL OF MATERIALS CHEMISTRY A 8(2020).