Direct Surface Passivation of Perovskite Film by 4-Fluorophenethylammonium Iodide toward Stable and Efficient Perovskite Solar Cells

Jiang, Xiongzhuo1,2,3; Chen, Shi3; Li, Yang3,4,5; Zhang, Lihua3; Shen, Nan3; Zhang, Guoge1,2; Du, Jun1,2; Fu, Nianqing3; Xu, Baomin1,2

2021-01-20

10.1021/acsami.0c17773

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

Passivating the defective surface of perovskite films is becoming a particularly effective approach to further boost the efficiency and stability of their solar cells. Organic ammonium halide salts are extensively utilized as passivation agents in the form of their corresponding 2D perovskites to construct the 2D/3D perovskite bilayer architecture for superior device performance; however, this bilayer device partly suffers from the postannealing-induced destructiveness to the 3D perovskite bulk and charge transport barrier induced by the quantum confinement existing in the 2D perovskite. Hence, developing direct passivation of the perovskite layer by organic ammonium halides for high-performance devices can well address the above-mentioned issues, which has rarely been explored. Herein, an effective passivation strategy is proposed to directly modify the perovskite surface with an organic halide salt 4-fluorophenethylammonium iodide (F-PEAI) without further postannealing. The F-PEAL passivation largely inhibits the formation of the iodine vacancies and thus dramatically reduces the film defects, resulting in a much slower charge trapping process. Consequently, the F-PEAL-modified device achieves a much higher champion efficiency (21%) than that (19.5%) of the control device, which dominantly results from more efficient suppression of interfacial nonradiative recombination and the subsequent decreased recombination losses. Additionally, the F-PEAL-treated device maintains 90% of its initial efficiency after 720 h of humidity aging owing to the enhanced hydrophobicity and decreased trap states, highlighting good ambient stability. These results provide an effective passivation strategy toward efficient and stable perovskite solar cells.

4-fluorophenethylammonium iodide surface passivation decreased defects nonradiative recombination high efficiency perovskite solar cells

SCI ; EI

英语

第一 ; 通讯

National Key Research and Development Project from the Ministry of Science and Technology of China["2016YFA0202400","2016YFA0202404"] ; National Natural Science Foundation of China[61604058,62004089] ; Shenzhen Science and Technology Innovation Committee["KQTD2015033110182370","JCYJ20190809150811504","JCYJ20180302174026262"] ; Guangdong Basic and Applied Basic Research Foundation["2019B1515120083","2019A1515110439"] ; Shenzhen Engineering Research and Development Center for Flexible Solar Cells Project from Shenzhen Development and Reform Committee[2019-126]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000612551400038

AMER CHEMICAL SOC

20210409823457

Charge trapping ; Efficiency ; Passivation ; Perovskite ; Quantum chemistry

Minerals:482.2 ; Protection Methods:539.2.1 ; Physical Chemistry:801.4 ; Production Engineering:913.1 ; Atomic and Molecular Physics:931.3

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Shenzhen 518055, Guangdong, Peoples R China
3.South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
4.Hong Kong Baptist Univ, Dept Chem, Kowloon, Hong Kong, Peoples R China
5.Hong Kong Baptist Univ, Inst Mol Funct Mat, Kowloon, Hong Kong, Peoples R China

Jiang, Xiongzhuo,Chen, Shi,Li, Yang,et al. Direct Surface Passivation of Perovskite Film by 4-Fluorophenethylammonium Iodide toward Stable and Efficient Perovskite Solar Cells[J]. ACS Applied Materials & Interfaces,2021,13(2):2558-2565.

Jiang, Xiongzhuo.,Chen, Shi.,Li, Yang.,Zhang, Lihua.,Shen, Nan.,...&Xu, Baomin.(2021).Direct Surface Passivation of Perovskite Film by 4-Fluorophenethylammonium Iodide toward Stable and Efficient Perovskite Solar Cells.ACS Applied Materials & Interfaces,13(2),2558-2565.

Jiang, Xiongzhuo,et al."Direct Surface Passivation of Perovskite Film by 4-Fluorophenethylammonium Iodide toward Stable and Efficient Perovskite Solar Cells".ACS Applied Materials & Interfaces 13.2(2021):2558-2565.