Abstract
In this study, a TiO2 nanorod array based TiO2/water solid-liquid heterojunction ultraviolet photodetector, fabricated via a low-cost hydrothermal process is reported. The device exhibits several excellent characteristics such as self-powered, visible-blind and fast response, high photosensitivity, and linear variations in photocurrent for incident UV-light intensities. In addition, suggestions are provided to further improve device performance and increase the growth density of TiO2 nanorod array in the initial growth stage of the hydrothermal process to avoid the FTO surface being directly exposed to the electrolyte (water) which is a key factor in the developing direction.
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