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High‐performance flexible perovskite photodetectors based on single‐crystal‐like two‐dimensional Ruddlesden–Popper thin films
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High‐performance flexible perovskite photodetectors based on single‐crystal‐like two‐dimensional Ruddlesden–Popper thin films
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High‐performance flexible perovskite photodetectors based on single‐crystal‐like two‐dimensional Ruddlesden–Popper thin films
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Journal Article
High‐performance flexible perovskite photodetectors based on single‐crystal‐like two‐dimensional Ruddlesden–Popper thin films
2023
Overview
Two‐dimensional Ruddlesden−Popper (2DRP) perovskites have attracted intense research interest for optoelectronic applications, due to their tunable optoelectronic properties and better environmental stability than their three‐dimensional counterparts. Furthermore, high‐performance photodetectors based on single‐crystal and polycrystalline thin‐films 2DRP perovskites have shown great potential for practical application. However, the complex growth process of single‐crystal membranes and uncontrollable phase distribution of polycrystalline films hinder the further development of 2DRP perovskites photodetectors. Herein, we report a series of high‐performance photodetectors based on single‐crystal‐like phase‐pure 2DRP perovskite films by designing a novel spacer source. Experimental and theoretical evidence demonstrates that phase‐pure films substantially suppress defect states and ion migration. These highly sensitive photodetectors show Ilight/Idark ratio exceeding 3 × 104, responsivities exceeding 16 A/W, and detectivities exceeding 3 × 1013 Jones, which are higher at least by 1 order than those of traditional mixed‐phase thin‐films 2DRP devices (close to the reported single‐crystal devices). More importantly, this strategy can significantly enhance the operational stability of optoelectronic devices and pave the way to large‐area flexible productions. A series of single‐crystal‐like two‐dimensional Ruddlesden−Popper perovskite thin films with more than 10 µm grain size are obtained. The photodetectors devices based on these high‐quality phase‐pure perovskite films demonstrate superior stability, high flexibility, and remarkable performance (Ilight/Idark ratio exceeding 3 × 104, responsivities exceeding 16 A/W, and detectivities exceeding 3 × 1013 Jones).
Publisher
John Wiley & Sons, Inc,Wiley
