Propylamine hydrobromide passivated tin-based perovskites to efficient solar cells

Xiaomeng Li; Pengcheng Jia; Fanwen Meng; Xingyu Zhang; Yang Tang; Bo Song; Chang Gao; Liang Qin; Feng Teng; Yanbing Hou

doi:10.1007/s12613-023-2604-y

Volume 30 Issue 10

Oct. 2023

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2023 > 30(10): 1965-1972

Xiaomeng Li, Pengcheng Jia, Fanwen Meng, Xingyu Zhang, Yang Tang, Bo Song, Chang Gao, Liang Qin, Feng Teng, and Yanbing Hou, Propylamine hydrobromide passivated tin-based perovskites to efficient solar cells, Int. J. Miner. Metall. Mater., 30(2023), No. 10, pp. 1965-1972. https://doi.org/10.1007/s12613-023-2604-y

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Xiaomeng Li, Pengcheng Jia, Fanwen Meng, Xingyu Zhang, Yang Tang, Bo Song, Chang Gao, Liang Qin, Feng Teng, and Yanbing Hou, Propylamine hydrobromide passivated tin-based perovskites to efficient solar cells, Int. J. Miner. Metall. Mater., 30(2023), No. 10, pp. 1965-1972. https://doi.org/10.1007/s12613-023-2604-y

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Research Article

Propylamine hydrobromide passivated tin-based perovskites to efficient solar cells

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Corresponding authors:
Liang Qin E-mail: qinliang@bjtu.edu.cn

Yanbing Hou E-mail: ybhou@bjtu.edu.cn
Received: 26 September 2022; Revised: 15 January 2023; Accepted: 19 January 2023; Available online: 20 January 2023

Abstract

Abstract

The development of tin-based devices with low toxicity is critical for the commercial viability of perovskite solar cells. However, because tin halide is a stronger Lewis acid, its crystallization rate is extremely fast, resulting in the formation of numerous defects that affect the device performance of tin-based perovskite solar cells. Herein, propylamine hydrobromide (PABr) was added to the perovskite precursor solution as an additive to passivate defects and fabricate more uniform and dense perovskite films. Because propylamine cations are too large to enter the perovskite lattices, they only exist at the grain boundary to passivate surface defects and promote crystal growth in a preferred orientation. The PABr additive raises the average short-circuit current density from 19.45 to 25.47 mA·cm⁻² by reducing carrier recombination induced by defects. Furthermore, the device’s long-term illumination stability is improved after optimization, and the hysteresis effect is negligible. The addition of PABr results in a power conversion efficiency of 9.35%.
- tin-based perovskite solar cells;
- propylamine hydrobromide;
- passivation;
- crystallization

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