Self‐Powered Flexible TiO2 Fibrous Photodetectors: Heterojunction with P3HT and Boosted Responsivity and Selectivity by Au Nanoparticles

作者：Lingxia Zheng, Xiaolei Deng, Yongzhi Wang, Jiaxin Chen, Xiaosheng Fang, Liang Wang, Xiaowei Shi, Huajun Zheng · 发表于：Advanced Functional Materials · 年份：2020 · DOI：10.1002/adfm.202001604 · 被引用次数：137 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Perovskite Materials and Applications、ZnO doping and properties

Abstract A novel inorganic–organic heterojunction (TiO2/P3HT (poly(3‐hexylthiophene)) is easily prepared by a combination of anodization and vacuumed dip‐coating methods, and the constructed flexible fibrous photodetector (FPD) exhibits high‐performance self‐powered UV–visible broadband photoresponse with fast speed, high responsivity, and good stability, as well as highly stable performance at bending states, showing great potential for wearable electronic devices. Moreover, Au nanoparticles are deposited to further boost the responsivity and selectivity by regulating the sputtering intervals. The optimal Au/TiO2/P3HT FPD yields an ≈700% responsivity enhancement at 0 V under 350 nm illumination. The sharp cut‐off edge and high UV–visible rejection ratio (≈17 times higher) indicate a self‐powered flexible UV photodetector. This work provides an effective and versatile route to modulate the photoelectric performance of flexible electronic devices.