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Enormously improved CH3NH3PbI3 film surface for environmentally stable planar perovskite solar cells with PCE exceeding 19.9%
Yang, Yingguo1,2,3; Feng, Shanglei1,2,3; Li, Meng4; Li, Fangchao4; Zhang, Congcong4; Han, Yujie1,3,4; Li, Li1,2,3; Yuan, Jianyu4; Cao, Liang5; Wang, Zhaokui4; Sun, Baoquan4; Gao, Xingyu1,2,3
2018-06-01
Source PublicationNANO ENERGY
ISSN2211-2855
Volume48Issue:Pages:10-19
Abstract

One of the most important factors governing the photovoltaic efficiency and environmental stability of Perovskite Solar Cells (PSCs) is the quality of their perovskite films. However, the present study demonstrates that CH3NH3PbI3 perovskite films after anti-solvent washing are far from perfect on the surface, where the crystallization degree is quite low with complex multi-phases associated with numerous defects and notable chemical inhomogeneity. Herein, we report a novel anti-solvent washing treatment simply using Hydrogen Iodide (HI) additive in chlorobenzene (CB) which can enormously improve CH3NH3PbI3 films surface with high crystallization phase purity and chemical homogeneity, leading to excellent structural stability under humidity, heat and even tensile force. Based on such high quality films with defect-less surface, fabricated planar PSCs with an architecture of ITO/TiO2/CH3NH3PbI3/Spiro-OMeTAD/MoOx/Au present a champion PCE of 19.94% and improved stability under humidity. Moreover, fabricated flexible planar PSCs on PET/ITO substrates with a champion PCE of 17.32% are shown to be more robust under tensile force than their control devices. The present study thus not only provides more insight into the facile defects passivation process on the surface achieved via balancing halide ions, but also provides a practical but efficient treatment which can be widely used to fabricate high quality CH3NH3PbI3 films for environmentally stable high performance device applications.

KeywordPerovskite solar cells Surface crystallization phase purity In-situ stretching synchrotron-based XRD Structural stability
DOI10.1016/j.nanoen.2018.03.046
WOS KeywordORGANOMETAL HALIDE PEROVSKITE ; HIGH-EFFICIENCY ; PERFORMANCE ; CRYSTALLIZATION ; HYSTERESIS ; CONVERSION ; LIFETIME ; DEFECTS ; CATION ; LAYER
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[21503233] ; National Natural Science Foundation of China[11574317] ; National Key Research and Development Program of China[2017YFA0403400] ; National Key Research and Development Program of China[2017YFB0701902] ; National Natural Science Foundation of China[11675252] ; National Natural Science Foundation of China[11175239] ; National Natural Science Foundation of China[11605278] ; National Natural Science Foundation of China[11705271] ; National Natural Science Foundation of China[51761145013] ; National Natural Science Foundation of China[U1632265] ; Shanghai Sailing Program[17YF1423700] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA02040200] ; One Hundred Talents Project of the Chinese Academy of Sciences
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000432604600002
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/36725
Collection中科院强磁场科学中心
Corresponding AuthorGao, Xingyu
Affiliation1.Chinese Acad Sci, Shanghai Inst Appl Phys, 2019 Jialuo Rd, Shanghai 201800, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, SSRF, 239 Zhangheng Rd, Shanghai 201204, Peoples R China
4.Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, 199 Renai Rd, Suzhou 215123, Peoples R China
5.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Yang, Yingguo,Feng, Shanglei,Li, Meng,et al. Enormously improved CH3NH3PbI3 film surface for environmentally stable planar perovskite solar cells with PCE exceeding 19.9%[J]. NANO ENERGY,2018,48(无):10-19.
APA Yang, Yingguo.,Feng, Shanglei.,Li, Meng.,Li, Fangchao.,Zhang, Congcong.,...&Gao, Xingyu.(2018).Enormously improved CH3NH3PbI3 film surface for environmentally stable planar perovskite solar cells with PCE exceeding 19.9%.NANO ENERGY,48(无),10-19.
MLA Yang, Yingguo,et al."Enormously improved CH3NH3PbI3 film surface for environmentally stable planar perovskite solar cells with PCE exceeding 19.9%".NANO ENERGY 48.无(2018):10-19.
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