Could two-dimensional perovskites fundamentally solve the instability of perovskite photovoltaics |
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| Affiliation: | 1.Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;2.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;3.Key Laboratory of Materials for High Power Laser, Chinese Academy of Sciences, Shanghai 201800, China;4.Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China |
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| Abstract: | The high efficiency and low production cost enable the halide perovskite solar cells as a promising technology for the next generation photovoltaics. Nevertheless, the relatively poor stability of the organic-inorganic halide perovskites hinders their commercial applications. In the past few years, two-dimensional (2D) perovskite has emerged as a more stable alternative to the three-dimensional (3D) counterparts and attracted intense research interests. Although many attempts and advances have been made, it is still ambiguous that whether the 2D perovskites could bring closure to the stability issue. To answer this essential question, a systematic study of the nature of 2D halide perovskites is necessary. Here, we focus on the stability investigations of 2D perovskites from different perspectives, especially light, heat, ion migration and strain. Several remaining challenges and opening problems are also discussed. With further material and device engineering, we believe that the 2D perovskites would promote perovskite solar cells to a promising future. |
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| Keywords: | halide perovskite solar cells two-dimensional perovskites stability |
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