A Cu‐Doping Strategy to Enhance Photoelectric Performance of Self‐Powered Hole‐Conductor‐Free Perovskite Photodetector for Optical Communication Applications,Advanced Materials Technologies

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A Cu‐Doping Strategy to Enhance Photoelectric Performance of Self‐Powered Hole‐Conductor‐Free Perovskite Photodetector for Optical Communication Applications
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-06-18 , DOI: 10.1002/admt.202000260
Zhiyong Liu ₁ , Xingyue Liu ₁ , Bo Sun ₁ , Xianhua Tan ₁ , Haibo Ye ₁ , Jianxin Zhou ₂ , Zirong Tang ₁ , Tielin Shi ₁ , Guanglan Liao _{1,

3}

Affiliation

Photodetectors are essential parts of wireless optical communication system for obtaining high fidelity signal transmission, which mainly relies on expensive and energy‐consuming Si, GaN, and InGaAs based photodiodes. The emerging organic–inorganic metal halide perovskite materials, with the merits of low‐cost, strong optical absorption, superior charge transport, and so on, are widely investigated in photodetection applications. Herein, a Cu ion induced p‐type doping strategy for perovskite film is proposed to facilitate hole transport, passivate trap states, avoid charge accumulation, and suppress recombination of photogenerated carriers, contributing to an enhanced photoelectric performance for self‐powered hole‐conductor‐free devices. The optimal device shows a highest responsivity of 0.37 A W⁻¹, detectivity of 1.06 × 10¹² Jones, linear dynamic range of over 101 dB, and an ultimate photoresponse rate approaching 5 µs. Moreover, an optical communication system integrated with the perovskite photodetector as light signal receiver for transmitting digital signals is demonstrated, in which characters can be transmitted accurately, and audio signal is recovered with high fidelity. The results suggest that with proper chemical modification, perovskite materials are promising alternative to inorganic semiconductors for efficient photodetection in advanced integrated optical communication system.

中文翻译：

一种用于光通信应用的铜掺杂策略可增强自供电无孔导体钙钛矿光电探测器的光电性能

光电探测器是无线光学通信系统中获得高保真度信号传输的重要组成部分，光电探测器主要依靠昂贵且耗能的Si，GaN和InGaAs基光电二极管。新兴的有机-无机金属卤化物钙钛矿材料具有低成本，强光吸收，优异的电荷传输等优点，在光检测应用中得到了广泛的研究。本文提出了一种铜离子诱导钙钛矿薄膜的p型掺杂策略，以促进空穴传输，钝化陷阱态，避免电荷积累并抑制光生载流子的重组，从而有助于增强自供电空穴导体的光电性能。免费设备。最佳设备显示出0.37 AW ^-1的最高响应度，灵敏度为1.06×10 ¹² Jones，线性动态范围超过101 dB，最终光响应速率接近5 µs。此外，展示了与钙钛矿光电检测器集成在一起的光通信系统，该光通信系统是用于发送数字信号的光信号接收器，其中可以精确地发送字符，并以高保真度恢复音频信号。结果表明，经过适当的化学修饰，钙钛矿材料有望成为无机半导体的替代品，以在先进的集成光通信系统中进行有效的光电检测。

更新日期：2020-08-10

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