Fast response and high sensitive photoelectrochemical ultraviolet detectors based on electrospinning SrTiO 3 nanowires

One-dimensional nanowires can provide a direct electron transmission channel, as a result, the photogenerated carriers can be more easily and quickly transferred to the current collector. In a photoelectrochemical (PEC) ultraviolet (UV) detector, photoanode assemble using nanowires also possesses a large specific surface area to be beneficial for contacting between the electrolyte and photoanode. In this work, the SrTiO 3 nanowires are fabricated by electrospinning and then assembled PEC UV detectors. Under UV illumination, the detector based on the SrTiO 3 nanowires presents a superior detection performance with a response time of 8 ms. In particular, the device exhibits an efficient detection ability for weak UV light. Under the UV illumination intensity of 5 μW cm − 2 , the current density J sc reaches 11.3 nA cm − 2 . The device also presents visible-blind, outstanding linear response and excellent repeatability under periodic UV irradiation.