Recent advances on organic‐inorganic hybrid perovskite photodetectors with fast response
Recent advances on organic‐inorganic hybrid perovskite photodetectors with fast response
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DOI：
10.1002/inf2.12010
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发表时间：
2019-06
期刊：
影响因子：
22.7
通讯作者：
Yan Zhao;Chenglong Li;Liang Shen
中科院分区：
文献类型：
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作者：
Yan Zhao;Chenglong Li;Liang Shen
近十年来，基于有机-无机杂化钙钛矿（OIHP）材料的光电器件具有直接带隙、吸收系数大、缺陷密度低、载流子寿命长、扩散长度和溶液可加工性等独特优势，与传统无机半导体器件并驾齐驱。最先进的 OIHP 光电探测器具有与基于 Si 和 III-V 化合物半导体的光电探测器相当的性能。大量的努力集中在提高灵敏度、拓宽检测光谱、扩大线性动态范围上。然而，很少有报道强调响应速度这一重要参数。在这篇综述中，我们总结了快速响应的OIHP光电探测器的进展和应用。基于光伏型和光电导型OIHP光电探测器，系统地阐述了其工作原理和决定响应速度的关键因素。然后，详细讨论了由阻容（RC）时间常数和载流子渡越时间组成的响应速度的研究进展。随后，考虑到钙钛矿材料固有的灵活性，我们简要讨论了柔性光电探测器。最后，进一步提出了设计快速响应 OIHP 光电探测器的展望和潜在规则。
In the last decade, optoelectronic devices based on organic‐inorganic hybrid perovskite (OIHP) materials, which have unique advantages of direct bandgap, large absorption coefficient, low density of defects, long charge carrier lifetime, diffusion length, and solution processability, have traveled with traditional inorganic semiconductor devices. The state‐of‐the‐art OIHP photodetectors have contributed a comparable performance with Si and III‐V compound semiconductor based photodetectors. Large amount of efforts have been focused on improving sensitivity, broadening detection spectra, enlarging linear dynamic range. However, few reports emphasized the important parameter of response speed. In this review, we summarize the progress and applications of OIHP photodetectors with fast response. Based on photovoltaic and photoconductive‐type OIHP photodetectors, the working principle and key factors on determining response speed are systematically mentioned. Then, the research progress of response speed, which is composed of resistance‐capacitance (RC) time constant and charge carrier transit time is discussed in detail. Subsequently, considering the intrinsic flexibility of perovskite materials, we briefly discuss the flexible photodetectors. Finally, an outlook and potential rules for designing fast‐response OIHP photodetectors are further proposed.