Photo-oxidative degradation of methylammonium lead iodide perovskite: mechanism and protection

doi:10.1039/c8ta12193a

	Photo-oxidative degradation of methylammonium lead iodide perovskite: mechanism and protection
	Wang, Jinlan 1; Ouyang, Yixin 1; Li, Yajuan 2; Zhu, Pengchen 3; Li, Qiang 1; Gao, Yuan 3; Tong, Jianyu 4; Shi, Li 1; Zhou, Qionghua 1; Ling, Chongyi 1
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2019-02-07
卷号	7 期号:5 页码:2275-2282
ISSN号	2050-7488
DOI	10.1039/c8ta12193a
通讯作者	Deng, Weiqiao(dengwq@dicp.ac.cn) ; Wang, Jinlan(jlwang@seu.edu.cn)
英文摘要	Although the power conversion efficiency of perovskite solar cells has exceeded 23%, the poor ambient stability of organic-inorganic halide perovskites poses a challenge for their commercialization. Comprehensive understanding of the underlying degradation mechanisms is a crucial step to seek approaches that can effectively suppress the degradation of perovskites. Herein, on the basis of extensive first-principles calculations, a three-step photo-oxidative degradation mechanism of MAPbI(3)d at the atomic level is revealed. We find that, in a dry ambient environment, the photo-generated superoxide anions (O-2(-)) first lead to fast surface oxidation. However, further oxidation of the perovskite interior is hindered by the solid oxidation product. The fresh water produced in surface oxidation leads to the hydration of the inner perovskite and eventual breakage of the MAPbI(3) lattice. We devise a practical strategy for protecting MAPbI(3) from photo-induced decomposition by anchoring hydrophobic 2-(4-fluorophenyl)propan-2-amine on the surface of MAPbI(3). The surface modification significantly retards the photo-induced decomposition.
资助项目	National Key R&D Program of China[2017YFA0204800] ; National Natural Science Foundation of China[21525311] ; National Natural Science Foundation of China[21773027] ; National Natural Science Foundation of China[11404056] ; National Natural Science Foundation of China[51502130] ; Jiangsu 333 project[BRA2016353] ; Scientific Research Foundation of Graduate School of Southeast University[YBJJ1772]
WOS关键词	INITIO MOLECULAR-DYNAMICS ; HALIDE PEROVSKITES ; SOLAR-CELLS ; AB-INITIO ; PHOTOVOLTAIC EFFICIENCY ; ELECTRONIC-STRUCTURE ; HIGH-PERFORMANCE ; ENERGY ; OXYGEN ; CH(3)NH(3)PBL(3)
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:000457546000035
资助机构	National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Jiangsu 333 project ; Jiangsu 333 project ; Scientific Research Foundation of Graduate School of Southeast University ; Scientific Research Foundation of Graduate School of Southeast University ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Jiangsu 333 project ; Jiangsu 333 project ; Scientific Research Foundation of Graduate School of Southeast University ; Scientific Research Foundation of Graduate School of Southeast University ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Jiangsu 333 project ; Jiangsu 333 project ; Scientific Research Foundation of Graduate School of Southeast University ; Scientific Research Foundation of Graduate School of Southeast University ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Jiangsu 333 project ; Jiangsu 333 project ; Scientific Research Foundation of Graduate School of Southeast University ; Scientific Research Foundation of Graduate School of Southeast University
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/166114]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Wang, Jinlan; Deng, Weiqiao
作者单位	1.Southeast Univ, Sch Phys, Nanjing 211189, Jiangsu, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China 3.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Jiangsu Key Lab Artificial Funct Mat, Natl Lab Solid State Microstruct,Coll Engn & Appl, Nanjing 210093, Jiangsu, Peoples R China 4.Nanjing Univ, Coll Engn & Appl Sci, Collaborat Innovat Ctr Adv Microstruct, Nanjing Natl Lab Microstruct,Dept Biomed Engn, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jinlan,Ouyang, Yixin,Li, Yajuan,et al. Photo-oxidative degradation of methylammonium lead iodide perovskite: mechanism and protection[J]. JOURNAL OF MATERIALS CHEMISTRY A,2019,7(5):2275-2282.
APA	Wang, Jinlan.,Ouyang, Yixin.,Li, Yajuan.,Zhu, Pengchen.,Li, Qiang.,...&Deng, Weiqiao.(2019).Photo-oxidative degradation of methylammonium lead iodide perovskite: mechanism and protection.JOURNAL OF MATERIALS CHEMISTRY A,7(5),2275-2282.
MLA	Wang, Jinlan,et al."Photo-oxidative degradation of methylammonium lead iodide perovskite: mechanism and protection".JOURNAL OF MATERIALS CHEMISTRY A 7.5(2019):2275-2282.