An organic–inorganic hybrid UV photodetector based on a TiO2 nanobowl array with high spectrum selectivity

Abstract

We demonstrate a facile way to fabricate high spectrum selectivity hybrid ultraviolet photodetectors with poly(N-vinylcarbazole) and a 2D TiO2 nanobowl (NB) array as the electron donor and acceptor, respectively. The highly ordered TiO2 NB array was prepared by using colloidal templates of polystyrene (PS) spheres. The response peak of the devices centered at 330 nm with a full width at half maximum of 38.5 nm, which is very close to the ultraviolet-B band (UVB, 280–320 nm).