Metastable Dion-Jacobson 2D structure enables efficient and stable perovskite solar cells

Zhang, Fei; Park, So Yeon; Yao, Canglang; Lu, Haipeng; Dunfield, Sean P.; Xiao, Chuanxiao; Uličná, Soňa; Zhao, Xiaoming; Du Hill, Linze; Chen, Xihan; Wang, Xiaoming; Mundt, Laura E.; Stone, Kevin H.; Schelhas, Laura T.; Teeter, Glenn; Parkin, Sean; Ratcliff, Erin L.; Loo, Yueh-Lin; Berry, Joseph J.; Beard, Matthew C.; Yan, Yanfa; Larson, Bryon W.; Zhu, Kai

doi:10.1126/science.abj2637

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Metastable Dion-Jacobson 2D structure enables efficient and stable perovskite solar cells

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Abstract

The performance of three-dimensional (3D) organic-inorganic halide perovskite solar cells (PSCs) can be enhanced through surface treatment with 2D layered perovskites that have efficient charge transport. We maximized hole transport across the layers of a metastable Dion-Jacobson (DJ) 2D perovskite that tuned the orientational arrangements of asymmetric bulky organic molecules. The reduced energy barrier for hole transport increased out-of-plane transport rates by a factor of 4 to 5, and the power conversion efficiency (PCE) for the 2D PSC was 4.9%. With the metastable DJ 2D surface layer, the PCE of three common 3D PSCs was enhanced by approximately 12 to 16% and could reach approximately 24.7%. For a triple-cation–mixed-halide PSC, 90% of the initial PCE was retained after 1000 hours of 1-sun operation at ~40°C in nitrogen.

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14 SOLAR ENERGY 2D 36 MATERIALS SCIENCE hydrogen bonding metastable perovskite

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Zhang, Fei, Park, So Yeon, Yao, Canglang, Lu, Haipeng, Dunfield, Sean P., Xiao, Chuanxiao, Uličná, Soňa, Zhao, Xiaoming, Du Hill, Linze, Chen, Xihan, Wang, Xiaoming, Mundt, Laura E., Stone, Kevin H., Schelhas, Laura T., Teeter, Glenn, Parkin, Sean, Ratcliff, Erin L., Loo, Yueh-Lin, Berry, Joseph J., Beard, Matthew C., Yan, Yanfa, Larson, Bryon W., Zhu, Kai. 2021-11-25. Metastable Dion-Jacobson 2D structure enables efficient and stable perovskite solar cells. https://doi.org/10.1126/science.abj2637

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