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Get Free AccessTwo-dimensional (2D) hybrid perovskite solar cells have induced widespread research interest owing to their higher stability as compared to three-dimensional (3D) analogues. The photovoltaic performance, however, is still limited. Here, we report a perovskite film dominated by 3D components that are modulated by formamidinium thiocyanate in the 2D PEA2FA3Pb4I13 perovskite composition. We demonstrate that a dimensionality transformation from a 2D/3D to predominantly 3D perovskite phase in the presence of SCN-based treatment enhances the optical absorption in visible and near-infrared regions. As a result, the power conversion efficiency improved 4.5 times with respect to the control to above 14%. The unencapsulated cell exhibited excellent moisture stability during the shelf lifetime measurement over 70 days under ambient conditions.
Hongwei Han, Zaiwei Wang, Jovana V. Milić, Claudia E. Avalos, Weihua Zhang, Dan Ren, Cheng Wang, Brian Carlsen, Yuhang Liu, Shaik M. Zakeeruddin, Anders Hagfeldt, Ti Wang, Hongwei Han, Michael Graetzel (2022). Thiocyanate-Mediated Dimensionality Transformation of Low-Dimensional Perovskites for Photovoltaics. , 34(14), DOI: https://doi.org/10.1021/acs.chemmater.2c00760.
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Type
Article
Year
2022
Authors
14
Datasets
0
Total Files
0
Language
en
DOI
https://doi.org/10.1021/acs.chemmater.2c00760
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