Polymer hole-transport material improving thermal stability of inorganic perovskite solar cells

Shaiqiang MU, Qiufeng YE, Xingwang ZHANG, Shihua HUANG, Jingbi YOU

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Front. Optoelectron. ›› 2020, Vol. 13 ›› Issue (3) : 265-271. DOI: 10.1007/s12200-020-1041-z
RESEARCH ARTICLE

Polymer hole-transport material improving thermal stability of inorganic perovskite solar cells

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Abstract

Cesium-based inorganic perovskite solar cells (PSCs) are paid more attention because of their potential thermal stability. However, prevalent salt-doped 2,2′,7,7′-tetrakis(N,N-dipmethoxyphenylamine)9,9′-spirobifluorene (Spiro-OMeTAD) as hole-transport materials (HTMs) for a high-efficiency inorganic device has an unfortunate defective thermal stability. In this study, we apply poly(3-hexylthiophene-2,5-diyl) (P3HT) as the HTM and design all-inorganic PSCs with an indium tin oxide (ITO)/SnO2/LiF/CsPbI3xBrx/P3HT/Au structure. As a result, the CsPbI3xBrx PSCs achieve an excellent performance of 15.84%. The P3HT HTM-based device exhibits good photo-stability, maintaining ~80% of their initial power conversion efficiency over 280 h under one Sun irradiation. In addition, they also show better thermal stability compared with the traditional HTM Spiro-OMeTAD.

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Keywords

inorganic perovskite solar cell (PSC) / hole-transport material (HTM) / stability

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Shaiqiang MU, Qiufeng YE, Xingwang ZHANG, Shihua HUANG, Jingbi YOU. Polymer hole-transport material improving thermal stability of inorganic perovskite solar cells. Front. Optoelectron., 2020, 13(3): 265‒271 https://doi.org/10.1007/s12200-020-1041-z

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Acknowledgements

This work was supported by the Beijing Municipal Science and Technology Commission (Nos. Z181100004718005 and Z181100005118002).

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2020 Higher Education Press
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