Low-Temperature Solution Processed Utraviolet Photodetector Based on an Ordered TiO₂ Nanorod Array–Polymer Hybrid

A highly ordered, vertically oriented TiO 2 nanorod array is successfully synthesized on a transparent conductive substrate with a facile, free-template, and low-temperature solution method and applied in the fabrication of a hybrid ultraviolet photodetector with polyfluorene. With TiCl 4 treatment, the device exhibits high UV-sensitive photoductivity and fast response time. A maximum response of 33.2 mA/W at 395 nm is reached under zero bias, which provides a novel route to fabricate a low-cost photodetector with large area.