Semi-transparent organic/inorganic hybrid photo-detector using pentacene/ZnO diode connected to pentacene transistor

Semi-transparent organic–inorganic hybrid photo-detector cells were fabricated on glass substrate, composed of pentacene/ZnO photodiodes and pentacene thin-film transistors (TFTs). Semi-transparent NiOx window with a large band gap of ∼4 eV was used as an ohmic electrode on 50 nm-thin pentacene channel in the TFT and simultaneously on the 150 nm-thick pentacene layer, which is deposited on ZnO for p–n diode, to absorb visible and ultraviolet photons from pentacene and ZnO, respectively. Our photo-detector exhibited a minimum temporal response of ∼300 ms for photo-induced output voltage at −1 V input and −3 V supply voltage.

We fabricated semi-transparent photo-detector cells employing an organic/inorganic hybrid technique for photo diode and transistor, which operate at 3 V.Figure optionsDownload as PowerPoint slideHighlights
► Fabrication of semi-transparent organic–inorganic hybrid photo-detector cells.
► Photo detector composed of pentacene/ZnO photodiode and pentacene transistor.
► Detection and absorption of visible and UV photons from pentacene and ZnO.
► Short response time of ∼300 ms and low operation voltage of −3 V.