论文标题
基于CH3NH3PBBR3量子点/TIO2异构函数的高性能钙钛矿光电探测器
High-Performance Perovskite Photodetectors Based on CH3NH3PbBr3 Quantum Dot/TiO2 Heterojunction
论文作者
论文摘要
有机体铅卤化物钙钛矿材料为开发高性能光电探测器开辟了一个很好的机会，因为它们具有出色的光电特性。仅钙钛矿仅光电探测器的主要问题是严重的载体重组。将钙钛矿与高导电材料（例如石墨烯或过渡金属硫化物）的整合无疑改善了光自动递减率。但是，达到高度的整体表现仍然是一个挑战。在这里，通过沉积的钙钛矿量子点（QD）和原子层（ALD）Ultrathin Tio2膜构建了改进的光电探测器。设计的CH3NH3PBBR3 QD/TIO2双层设备显示包含性能，ON/OFF比为6.3x102，响应性为85 AW-1，上升/衰减时间为0.09/0.11 s。此外，我们证明了界面在确定设备电流并通过接口工程增强异质结构光电视球的整体性能中起着至关重要的作用。我们认为，这项工作可以提供一种策略，以加速高性能解决方案处理的钙钛矿光电探测器。
Organo-lead halide perovskite materials have opened up a great opportunity to develop high performance photodetectors because of their superior optoelectronic properties. The main issue with perovskite-only photodetector is severe carrier recombination. Integration of perovskite with high-conductive materials such as graphene or transition metal sulfides certainly improved the photoresponsivity. However, achieving high overall performance remains a challenge. Here, an improved photodetector is constructed by perovskite quantum dots (QDs) and atomic layer deposited (ALD) ultrathin TiO2 films. The designed CH3NH3PbBr3 QD/TiO2 bilayer device displays inclusive performance with on/off ratio of 6.3x102, responsivity of 85 AW-1, and rise/decay time of 0.09/0.11 s. Furthermore, we demonstrate that interface plays a crucial role in determining the device current and enhance the overall performance of heterostructure photodetectors through interface engineering. We believe that this work can provide a strategy to accelerate development of high-performance solution-processed perovskite photodetectors.
