Constructing of superhydrophobic and intact crystal terminal: Interface sealing strategy for stable perovskite solar cells with efficiency over 23%

doi:10.1016/j.cej.2022.139808

	Constructing of superhydrophobic and intact crystal terminal: Interface sealing strategy for stable perovskite solar cells with efficiency over 23%
	Xu, Shendong 2,3; Zhang, Liying 2,3; Liu, Boyuan 2,3; Liang, Zheng 2,3; Xu, Huifen 2,3; Zhang, Hui 1,3; Ye, Jiajiu 3; Ma, Haibin 1; Liu, Guozhen 3; Pan, Xu 3
刊名	CHEMICAL ENGINEERING JOURNAL
	2023-02-01
卷号	453
关键词	Perovskite solar cells Crystal terminal Terminal sealing Superhydrophobic Pseudo -halide
ISSN号	1385-8947
DOI	10.1016/j.cej.2022.139808
通讯作者	Liu, Guozhen(gzliu@issp.ac.cn)
英文摘要	The numerous nonstoichiometric imperfections on the perovskite crystal terminal are usually resulting in unwished nonradiative recombination as well as high risk of lead leakage. Herein, the terminal sealing strategy by using pseudo-halide ammonium salts was developed to seal lattice defects via ion-exchange reaction and interact with uncoordinated Pb2+ at the terminal of the perovskite films. The superhydrophobic ammonium cations can bond to undercoordinated Pb2+ and I-/Br- on crystal terminal, impeding erosion from the environment. Furthermore, the terminal sealing layer modulated the energy level alignment between perovskite and holes transport layer to promote efficient extraction of the hole. The optimal device attained a power conversion efficiency (PCE) over 23% without obvious hysteresis. The unencapsulated devices maintained 90% of the original PCE after operation at 60 +/- 10% RH for 1200 h and exhibited a 20% loss in PCE after 500 h light soaking aging. More importantly, immersion operation further showed their superior structure stability against water. This work provides a unique perspective towards reconstructing the imperfect lattice defects and reducing lead leakage venture of perovskite crystal terminals.
资助项目	National Key R&D Pro-gram of China ; Natural Science Foundation of Anhui Province ; China Postdoctoral Science Foundation ; [2021YFB3800102] ; [2108085J34] ; [2108085QE190] ; [2021M693213]
WOS关键词	IMMOBILIZATION ; PERFORMANCE ; STABILITY ; SALT
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000876988200004
资助机构	National Key R&D Pro-gram of China ; Natural Science Foundation of Anhui Province ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130021]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Guozhen
作者单位	1.Weifang Univ, Coll Chem Chem & Environm Engn, Weifang 261061, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Hefei Inst Phys Sci, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Xu, Shendong,Zhang, Liying,Liu, Boyuan,et al. Constructing of superhydrophobic and intact crystal terminal: Interface sealing strategy for stable perovskite solar cells with efficiency over 23%[J]. CHEMICAL ENGINEERING JOURNAL,2023,453.
APA	Xu, Shendong.,Zhang, Liying.,Liu, Boyuan.,Liang, Zheng.,Xu, Huifen.,...&Pan, Xu.(2023).Constructing of superhydrophobic and intact crystal terminal: Interface sealing strategy for stable perovskite solar cells with efficiency over 23%.CHEMICAL ENGINEERING JOURNAL,453.
MLA	Xu, Shendong,et al."Constructing of superhydrophobic and intact crystal terminal: Interface sealing strategy for stable perovskite solar cells with efficiency over 23%".CHEMICAL ENGINEERING JOURNAL 453(2023).