Abstract
The authors report on the fabrication of photo-detecting top-gate ZnO-based thin-film transistors (ZnO-TFTs) with poly-4-vinylphenol (PVP) polymer gate dielectric. A ZnO channel surface was treated by intense ultraviolet (UV, wavelength of 352 nm) before making contacts with PVP dielectric. Although our UV-treated devices showed lower on-state current than untreated pristine ones, the former also displayed orders of magnitude lower off-state current than the latter. We applied the UV-treated devices for enhancing their photo-detection properties, which basically needs low off-state current. Under a modulated photon signal (10 Hz, 364 nm) for the UV detection measurements, our photo-inverter with UV-treated ZnO-TFT exhibited a good dynamic property of ∼30 ms operating at 5 V.
Original language | English |
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Article number | 135102 |
Journal | Journal of Physics D: Applied Physics |
Volume | 41 |
Issue number | 13 |
DOIs | |
Publication status | Published - 2008 Jul 7 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Acoustics and Ultrasonics
- Surfaces, Coatings and Films