Colloidal wurtzite‐structure CdSe/ZnS quantum dots (CWQDs), with noncentral asymmetry structure and spontaneous polarization, have an extensive potential for applications based on the pyroelectric effect, such as energy harvestors, self‐powered nanogenerators, and photosensors. Here, a low‐cost, easy‐fabrication, and high‐speed self‐powered photodetector is demonstrated, which performs independently without any external power source. The response of the device caused by the photoinduced‐pyroelectric effect is experimentally investigated based on the Au/CWQDs/Au edge‐electrodes structure, which exhibits an ultrafast photoresponse with a rising time of 20.6 µs and a falling time of 30.1 µs. Moreover, the frequency and temperature dependence of the device also is investigated under zero bias. This work provides a new approach to achieve self‐powered photodetectors, which may show promise for extensive batch applications, such as wireless sensing, optothermal detection, optoelectronic communication, and energy harvesting.

中文翻译：

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基于光致热电效应的自供电胶体纤锌矿结构量子点光电探测器

具有非中心不对称结构和自发极化的胶体纤锌矿结构CdSe / ZnS量子点（CWQDs）在基于热释电效应的应用中具有广阔的潜力，例如能量收集器，自供电纳米发电机和光电传感器。这里展示了一种低成本，易于制造且高速的自供电光电探测器，该探测器在没有任何外部电源的情况下即可独立运行。基于Au / CWQDs / Au边缘电极结构，对由光致热释电效应引起的器件响应进行了实验研究，该结构表现出超快的光响应，上升时间为20.6 µs，下降时间为30.1 µs。此外，还研究了器件在零偏压下的频率和温度依赖性。