Inverted Perovskite Solar Cells with >85% Fill Factor via Sequential Interfacial Engineering

Shi, Junwei1,2; Li, Fangchao2,3; Liu, Cheng2,4; Ling, Xufeng2,3; Zhang, Xuliang2,3; Wang, Yao2,3; Guo, Junjun2,3; Zhao, Chenyu2,3; Wang, Deng1; Li, Youyong2,4; Ma, Wanli2,4; Yuan, Jianyu2,3; Xu, Baomin1

2023-03-01

10.1002/solr.202300078

SOLAR RRL   Impact Factor & Quartile

2367-198X

Even the most efficient inverted p-i-n architecture perovskite solar cells (PSCs) are still inferior to those with regular n-i-p architecture, which is mainly limited by interfacial loss. Herein, both wet and dry metal-halide perovskite films are regulated through organic molecules-assisted sequential interfacial engineering for high-performance inverted PSCs. In specific, organic acetic acid treatment on the wet film potently regulates the nucleation and crystallization of perovskite films. Then, further loading 4-(dimethylamino)benzoic acid on the dry perovskite film creates a passivating agent layer to suppress defect formation, leading to more phase-pure and conductive perovskite films. Combined experimental and theoretical results illustrate that such sequential treatment is beneficial for decreasing surface trap states, non-radiative recombination, and carrier transport loss. As a result, the target inverted PSC exhibits an unprecedented high fill factor (FF) of 85.31% together with a champion efficiency of 21.37%, which is greatly improved relative to the reference (FF of 79.60%, and efficiency of 19.40%). It should be noted that such a high FF is among the highest report and corresponding to 94.38% of the Shockley-Queisser limited FF (90.39%) of PSCs with a bandgap of 1.576 eV. In addition, the storage stability against moisture of target inverted PSCs is remarkably enhanced.

fill factor inverted perovskite solar cells sequential interfacial engineering

SCI

English

First ; Corresponding

National Key Research and Development Program of China[2021YFB3800101] ; National Natural Science Foundation of China["52261145696","52073198"] ; Natural Science Foundation of Jiangsu Province[BK20211598] ; Science and Technology Program of Jiangsu Province[BZ2020011] ; Basic and Applied Basic Research Foundation of Guangdong Province[2019B1515120083] ; Science and Technology Program of Suzhou[ST202219]

Energy & Fuels ; Materials Science

Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000955706800001

WILEY-V C H VERLAG GMBH

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Peoples R China
3.Soochow Univ, Jiangsu Key Lab Adv Negat Carbon Technol, Suzhou 215123, Jiangsu, Peoples R China
4.Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Jiangsu, Peoples R China

Shi, Junwei,Li, Fangchao,Liu, Cheng,et al. Inverted Perovskite Solar Cells with >85% Fill Factor via Sequential Interfacial Engineering[J]. SOLAR RRL,2023.

Shi, Junwei.,Li, Fangchao.,Liu, Cheng.,Ling, Xufeng.,Zhang, Xuliang.,...&Xu, Baomin.(2023).Inverted Perovskite Solar Cells with >85% Fill Factor via Sequential Interfacial Engineering.SOLAR RRL.

Shi, Junwei,et al."Inverted Perovskite Solar Cells with >85% Fill Factor via Sequential Interfacial Engineering".SOLAR RRL (2023).