Solution-processed hybrid perovskite photodetectors with high detectivity
Solution-processed hybrid perovskite photodetectors with high detectivity
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DOI：
10.1038/ncomms6404
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发表时间：
2014-11-01
影响因子：
16.6
通讯作者：
Yang, Yang
中科院分区：
文献类型：
--
作者：
Dou, Letian;Yang, Yang (Micheal);Yang, Yang
光电探测器捕获具有宽范围入射光子通量密度的光信号，并将其瞬时转换为电信号。GaN、Si和InGaAs光电探测器在成像、光通信、远程控制、化学/生物传感等方面有着重要的应用。在这里，我们展示了一种新型的溶液处理的光电探测器的基础上的有机-无机混合钙钛矿材料。在室温下工作，光电探测器表现出接近10（14）琼斯，线性动态范围超过100分贝（dB）和快速的光响应与3-dB带宽高达3 MHz的大探测率（检测弱信号的能力）。其性能明显优于迄今为止报道的大多数有机、量子点和混合光电探测器;并且与传统的基于无机发光二极管的光电探测器相当，甚至更好。我们的研究结果表明，通过适当的器件界面设计，钙钛矿材料是低成本，高性能光电探测器的有前途的候选者。
Photodetectors capture optical signals with a wide range of incident photon flux density and convert them to electrical signals instantaneously. They have many important applications including imaging, optical communication, remote control, chemical/biological sensing and so on. Currently, GaN, Si and InGaAs photodetectors are used in commercially available products. Here we demonstrate a novel solution-processed photodetector based on an organic-inorganic hybrid perovskite material. Operating at room temperature, the photodetectors exhibit a large detectivity (the ability to detect weak signals) approaching 10(14) Jones, a linear dynamic range over 100 decibels (dB) and a fast photoresponse with 3-dB bandwidth up to 3 MHz. The performance is significantly better than most of the organic, quantum dot and hybrid photodetectors reported so far; and is comparable, or even better than, the traditional inorganic semiconductor-based photodetectors. Our results indicate that with proper device interface design, perovskite materials are promising candidates for low-cost, high-performance photodetectors.