A Self‐Powered and Stable All‐Perovskite Photodetector–Solar Cell Nanosystem |
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Authors: | Hao Lu Wei Tian Fengren Cao Yulong Ma Bangkai Gu Liang Li |
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Affiliation: | College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, P. R. China |
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Abstract: | Hybrid organic–inorganic perovskites have attracted intensive interest as light absorbing materials in solid‐state solar cells. Herein, we demonstrate a high‐performance CH3NH3PbI3‐based perovskite photodetector constructed on the flexible indium tin oxide (ITO) coated substrate even after 200 bending cycles. The as‐fabricated devices show high responsivity, broad spectrum response from ultraviolet to whole visible light, long‐term stability, and high on‐off ratio. Particularly, atomic layer deposition technique was used to deposit the ultrathin Al2O3 film on devices, functioning as a protection layer to effectively enhance the stability and durability of perovskite photodetectors. The first all‐perovskite self‐powered nanosystem was successfully assembled by integrating a perovskite solar cell with a perovskite photodetector. Driven by the perovskite solar cell, the photodetector exhibits fast and stable response to illuminated light at a low working voltage less than 1.0 V. This stable integrated nanosystem has promising applications in which photodetectors can work in harsh environments without external power sources. |
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Keywords: | perovskite photodetectors solar cells nanosystems broad spectrum response |
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