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TiO2 Nanocrystal/Perovskite Bilayer for High‐Performance Photodetectors
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2017-07-24 , DOI: 10.1002/aelm.201700251 Xiaohui Yi 1, 2 , Zhenwei Ren 2, 3, 4 , Ningli Chen 1, 2 , Cheng Li 1 , Xinhua Zhong 3, 4 , Shiyong Yang 2, 5 , Jizheng Wang 2, 5
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2017-07-24 , DOI: 10.1002/aelm.201700251 Xiaohui Yi 1, 2 , Zhenwei Ren 2, 3, 4 , Ningli Chen 1, 2 , Cheng Li 1 , Xinhua Zhong 3, 4 , Shiyong Yang 2, 5 , Jizheng Wang 2, 5
Affiliation
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Owing to their attractive performance in photovoltaic devices, organolead halide perovskite materials have attracted enormous interest for photodetector applications. However, current perovskite‐based photodetectors mainly rely on high‐conductive 2D materials such as graphene or transition metal sulfides to transport photocarriers, which indeed significantly improve the photoresponsivity but seriously weaken other parameters such as on/off ratio or response speed. Achieving a high overall performance remains a challenge. Here, a solution‐processed TiO2 nanocrystal (NC) film is employed to transport photocarriers. The designed TiO2 NC/perovskite (CH3NH3PbI3) bilayer device exhibits satisfactory overall performance with on/off ratio of 4000, photodetectivity of 1.85 × 1012 Jones, and rise/decay time of 0.49/0.56 s. The device can also be integrated on flexible polyimide substrate. This work provides a strategy to realize high‐performance perovskite‐based photodetectors and clearly demonstrates their potential applications in future flexible optoelectronics.
中文翻译：
用于高性能光电探测器的TiO2纳米晶体/钙钛矿双层
由于其在光伏器件中的吸引人的性能，有机卤化钙钛矿材料对光电探测器应用引起了极大的兴趣。但是，当前基于钙钛矿的光电探测器主要依靠诸如石墨烯或过渡金属硫化物之类的高导电2D材料来传输光载流子，这确实显着提高了光响应性，但严重削弱了诸如开/关比或响应速度之类的其他参数。实现高整体性能仍然是一个挑战。在这里，采用固溶处理的TiO 2纳米晶体（NC）膜来传输光载流子。设计的TiO 2 NC /钙钛矿（CH 3 NH 3 PbI 3）双层器件具有令人满意的总体性能，开/关比为4000，光检测率为1.85×10 12 Jones，上升/下降时间为0.49 / 0.56 s。该装置也可以集成在柔性聚酰亚胺衬底上。这项工作提供了实现高性能基于钙钛矿的光电探测器的策略，并清楚地展示了它们在未来的柔性光电中的潜在应用。
更新日期：2017-07-24
中文翻译：
用于高性能光电探测器的TiO2纳米晶体/钙钛矿双层
由于其在光伏器件中的吸引人的性能，有机卤化钙钛矿材料对光电探测器应用引起了极大的兴趣。但是，当前基于钙钛矿的光电探测器主要依靠诸如石墨烯或过渡金属硫化物之类的高导电2D材料来传输光载流子，这确实显着提高了光响应性，但严重削弱了诸如开/关比或响应速度之类的其他参数。实现高整体性能仍然是一个挑战。在这里，采用固溶处理的TiO 2纳米晶体（NC）膜来传输光载流子。设计的TiO 2 NC /钙钛矿（CH 3 NH 3 PbI 3）双层器件具有令人满意的总体性能，开/关比为4000，光检测率为1.85×10 12 Jones，上升/下降时间为0.49 / 0.56 s。该装置也可以集成在柔性聚酰亚胺衬底上。这项工作提供了实现高性能基于钙钛矿的光电探测器的策略，并清楚地展示了它们在未来的柔性光电中的潜在应用。
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