High Quality Perovskite Crystals for Efficient Film Photodetectors Induced by Hydrolytic Insulating Oxide Substrates |
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| Authors: | Yiming Li Yusheng Li Jiangjian Shi Huiyin Zhang Jionghua Wu Dongmei Li Yanhong Luo Huijue Wu Qingbo Meng |
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| Affiliation: | 1. Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, P. R. China;2. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, P. R. China |
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| Abstract: | A high quality perovskite film is a key factor in determining the device performance, such as photovoltaic cells, light‐emission diodes, lasers, and photodetectors. Here, a method is presented to improve the crystalline quality of perovskite films on surface‐oxygen‐rich insulating oxide substrates, which can promote the growth of both the polycrystalline and single crystals and enhance the adhesion between the perovskites and the substrates. A much longer carrier diffusion length of exceeding 5 µm together with significantly reduced trap density and nonradiative recombination is achieved for the film. These perovskite films show much better lasing and photodetector performance, indicating promising applications for the light emitting, lasing, and detector devices. |
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| Keywords: | crystalline qualities hydrolytic insulating oxide perovskites photodetectors |
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