A high-performance TiO2 nanowire UV detector assembled by electrospinning

Abstract

Here, a transparent, flexible and nanoscale TiO₂ ultraviolet (UV) photodetector has been fabricated by electrospinning. Well aligned TiO₂ nanowires were collected on a flexible mica substrate. Then, the nano-device was simply assembled by depositing interdigitated platinum electrodes on the surface. Upon UV illumination, the photosensitivity of this device is up to over three orders of magnitude with relatively fast and stable response speed under 254 nm and 365 nm UV light. This nanosensor retains a high photo-dark current ratio, fast response time and stable durability during bending tests, indicating an excellent reversibility and stability of the flexible TiO₂ nanowires. The highly flexible photosensor demonstrates a good potential candidate for wearable optoelectronic applications.