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.
Bibliographical noteFunding Information:
The authors acknowledge the financial support from NRF (NRL program: Grant No. 2011-0000375 ), the MKE (IT R&D program: No. 2006-S-079-5), Seoul R&BD Program (ST090839) and Brain Korea 21 program. K.H. Lee would like to thank for the Seoam and Agency of Defense Development (ADD) Fellowships.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Materials Chemistry
- Electrical and Electronic Engineering