INFLUENCE OF 1,1 '-SULFONYL BIS （2-METHYL-1H-IMIDAZOLE） ON PERFORMANCE OF WIDE-BAND GAP PEROVSKITE SOLAR CELLS

Dai Yao; Wang Pengyang; Zhao Ying; Zhang Xiaodan

doi:10.19912/j.0254-0096.tynxb.2023-1441

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (4) : 43-50. DOI: 10.19912/j.0254-0096.tynxb.2023-1441

INFLUENCE OF 1,1 '-SULFONYL BIS （2-METHYL-1H-IMIDAZOLE） ON PERFORMANCE OF WIDE-BAND GAP PEROVSKITE SOLAR CELLS

Dai Yao^1~4, Wang Pengyang^1~4, Zhao Ying^1~4, Zhang Xiaodan^1~4

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Abstract

In this work, 1,1'-sulfonyl bis （2-methyl-1H-imidazole） was doped into the light absorption layer of inverted structure perovskite solar cells with a band gap of ~1.68 eV, resulting in improved film quality and device performance. Space charge limited current （SCLC） testing results reveal that the defect density of doped perovskite films decreases significantly, while the steady-state photoluminescence （PL） analysis demonstrates that non-radiative recombination is significantly inhibited. The open-circuit voltage reaches 1.17 V and the photoelectric conversion efficiency achieves 21.42%. The unpackaged device can still maintain 96% of the initial efficiency, and the stability is significantly improved after being stored in nitrogen environment for 1000 hours.

Key words

perovskite solar cells / crystal growth / wide band gap semiconductors / passivation / 1,1'-sulfonylbis（2-methyl-1 H-imidazole）

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Dai Yao, Wang Pengyang, Zhao Ying, Zhang Xiaodan. INFLUENCE OF 1,1 '-SULFONYL BIS （2-METHYL-1H-IMIDAZOLE） ON PERFORMANCE OF WIDE-BAND GAP PEROVSKITE SOLAR CELLS[J]. Acta Energiae Solaris Sinica. 2024, 45(4): 43-50 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1441

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