Self-powered and flexible ultrabroadband photodetectors (PDs) are desirable in a wide range of applications. The current PDs based on the photothermoelectric (PTE) effect have realized broadband photodetection. However, most of them express low photoresponse and lack of flexibility. In this work, high-performance, self-powered, and flexible PTE PDs based on laser-scribed reduced graphene oxide (LSG)/CsPbBr3 are developed. The comparison experiment with LSG PD and fundamental electric properties show that the LSG/CsPbBr3 device exhibits enhanced ultrabroadband photodetection performance covering ultraviolet to terahertz range with high photoresponsivity of 100 mA/W for 405 nm and 10 mA/W for 118 μm at zero bias voltage, respectively. A response time of 18 ms and flexible experiment are also acquired at room temperature. Moreover, the PTE effect is fully discussed in the LSG/CsPbBr3 device. This work demonstrates that LSG/CsPbBr3 is a promising candidate for the construction of high-performance, flexible, and self-powered ultrabroadband PDs at room temperature.

中文翻译：

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基于激光还原氧化石墨烯/CsPbBr3 复合材料的自供电、灵活和超宽带紫外-太赫兹光电探测器

自供电和灵活的超宽带光电探测器 (PD) 在广泛的应用中是可取的。目前基于光热电（PTE）效应的 PD 已经实现了宽带光电探测。然而，它们中的大多数表现出低光响应和缺乏灵活性。在这项工作中，开发了基于激光划线还原氧化石墨烯 (LSG)/CsPbBr3 的高性能、自供电和灵活的 PTE PD。与 LSG PD 和基本电学特性的对比实验表明，LSG/CsPbBr3 器件在零偏压下表现出增强的超宽带光电探测性能，覆盖紫外到太赫兹范围，405 nm 的光响应率为 100 mA/W，118 μm 的光响应率为 10 mA/W ， 分别。在室温下也获得了 18 毫秒的响应时间和灵活的实验。而且，在 LSG/CsPbBr3 器件中充分讨论了 PTE 效应。这项工作表明 LSG/CsPbBr3 是在室温下构建高性能、灵活和自供电的超宽带 PD 的有前途的候选材料。