High-Performance Inverted Perovskite Solar Cells Enhanced via Partial Replacement of Dimethyl Sulfoxide with N-Methyl-2-Pyrrolidinone

Li, Yuheng1,2; Fan, Hua1,2; Xu, Feiyang1,2; Wang, Teng1; Shan, Chengwei1; Li, Wenhui1; Gu, Xiaoyu1; Lai, Xue1; Luo, Dou1; Sun, Zonghao2; Zhao, Mengshuai2; Li, Xuehui2; Cui, Kun2; Li, Gongqiang2,3; Kyaw, Aung Ko Ko1

2022-10-01

10.1002/solr.202200816

Solar RRL   Impact Factor & Quartile

2367-198X

Herein, a very simple but efficient method is developed to concurrently improve the quality of perovskite film and enhance the interfaces of perovskite solar cells (PSCs) concurrently via partially replacing dimethyl sulfoxide (DMSO) with N-methyl-2-pyrrolidinone (NMP) in inverted planar PSCs. With the systematic investigations, it is found that the perovskite films fabricated with this simple method demonstrate higher crystallinity, larger grain size with less grain boundaries, and better perovskite-substrate interface with very rare voids. All of these lead to efficient all-round defects suppression and high performance of the corresponding PSCs. As a result, the tri-mixed solvent (DMF:DMSO:NMP = 4:0.75:0.25) processing renders a power conversion efficiency (PCE) of 21.53%, which is much higher than that of PSCs fabricated with traditional bi-mixed solvent (DMF:DMSO = 4:1) (only 17.05%). Notably, the simple-method-fabricated PSCs demonstrate remarkable humidity and thermal stabilities even without any encapsulation (90.6% and 75.2% of initial PCE are retained after more than 511 h in air with relative humidity (RH) approximate to 50% at room temperature and 216 h in air with RH 70% at continuous heating of 70 degrees C, respectively). All these results demonstrate that the simple method by partially replacing DMSO with NMP is very efficient to improve the quality of perovskite layer and yield high-performance PSCs.

inverted planar perovskite solar cells N-methyl-2-pyrrolidinone solvent replacement stabilization substrate interfaces

SCI

English

First ; Corresponding

National Key R&D Program of China[2017YFA0204704] ; National Natural Science Foundation of China[62150610496] ; Six Talent Peaks Project in Jiangsu Province[XCL-026] ; Open Project Program of Wuhan National Laboratory for Optoelectronics[2020WNLOKF010] ; Guangdong Basic and Applied Basic Research Foundation[2020A1515010916] ; Department of Education of Guangdong Province University Innovation Foundation[2021KTSCX107]

Energy & Fuels ; Materials Science

Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000866092400001

WILEY-V C H VERLAG GMBH

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Guangdong Univ Key Lab Adv Quantum Dot Displays &, Shenzhen Key Lab Adv Quantum Dot Displays & Light, Shenzhen 518055, Peoples R China
2.Nanjing Tech Univ NanjingTech, Inst Adv Mat IAM, Nanjing 211816, Peoples R China
3.Huazhong Univ Sci & Technol HUST, Wuhan Natl Lab Optoelect WNLO, Wuhan 430074, Hubei, Peoples R China

Li, Yuheng,Fan, Hua,Xu, Feiyang,et al. High-Performance Inverted Perovskite Solar Cells Enhanced via Partial Replacement of Dimethyl Sulfoxide with N-Methyl-2-Pyrrolidinone[J]. Solar RRL,2022.

Li, Yuheng.,Fan, Hua.,Xu, Feiyang.,Wang, Teng.,Shan, Chengwei.,...&Kyaw, Aung Ko Ko.(2022).High-Performance Inverted Perovskite Solar Cells Enhanced via Partial Replacement of Dimethyl Sulfoxide with N-Methyl-2-Pyrrolidinone.Solar RRL.

Li, Yuheng,et al."High-Performance Inverted Perovskite Solar Cells Enhanced via Partial Replacement of Dimethyl Sulfoxide with N-Methyl-2-Pyrrolidinone".Solar RRL (2022).