Self-powered,flexible,and ultrabroadband ultraviolet-terahertz photodetector based on a laser-reduced graphene oxide/CsPbBr3 composite

• 作者: JIANQUAN YAO MENGYAO LIHONGLIANG ZHAO QINGYAN LI QUAN SHENG TENGTENG LI WEI SHI YATING ZHANG YIFAN LI ZHILIANG CHEN
• 来源期刊: 光子学研究:英文版
• 学科: 医学
• 关键词: ULTRAVIOLET Br3 powered
• 年，卷（期）: 2020,（8）
• 页码范围: 1301-1308
• 页数: 8页
• 分类号: R65

摘要

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 118μm 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.