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).