Dynamic Control of Photoresponse in ZnO-Based Thin-Film Transistors in the Visible Spectrum
We present ZnO-channel thin-film transistors with actively tunable photocurrent in the visible spectrum, although ZnO band edge is in the ultraviolet. ZnO channel is deposited by atomic layer deposition technique at a low temperature (80 <formula formulatype="inline"><tex Notation...
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| Format: | Article |
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IEEE
2013-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/6479671/ |
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| author | Levent E. Aygun Feyza B. Oruc Fatih B. Atar Ali K. Okyay |
| author_facet | Levent E. Aygun Feyza B. Oruc Fatih B. Atar Ali K. Okyay |
| author_sort | Levent E. Aygun |
| collection | DOAJ |
| description | We present ZnO-channel thin-film transistors with actively tunable photocurrent in the visible spectrum, although ZnO band edge is in the ultraviolet. ZnO channel is deposited by atomic layer deposition technique at a low temperature (80 <formula formulatype="inline"><tex Notation="TeX">$^{\circ}\hbox{C}$</tex></formula>), which is known to introduce deep level traps within the forbidden band of ZnO. The gate bias dynamically modifies the occupancy probability of these trap states by controlling the depletion region in the ZnO channel. Unoccupied trap states enable the absorption of the photons with lower energies than the bandgap of ZnO. Photoresponse to visible light is controlled by the applied voltage bias at the gate terminal. |
| format | Article |
| id | doaj-art-04fab514a2c4497e9399e21bc4b5a8e3 |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-04fab514a2c4497e9399e21bc4b5a8e32025-08-20T02:40:10ZengIEEEIEEE Photonics Journal1943-06552013-01-01522200707220070710.1109/JPHOT.2013.22502746479671Dynamic Control of Photoresponse in ZnO-Based Thin-Film Transistors in the Visible SpectrumLevent E. Aygun0Feyza B. Oruc1Fatih B. Atar2Ali K. Okyay3<formula formulatype="inline"><tex Notation="TeX">$^{1}$</tex></formula>Department of Electrical and Electronics Engineering, Bilkent University, Ankara , TurkeyDepartment of Electrical and Electronics Engineering, Bilkent University, Ankara, TurkeyDepartment of Electrical and Electronics Engineering, Bilkent University, Ankara, TurkeyDepartment of Electrical and Electronics Engineering, Bilkent University, Ankara, TurkeyWe present ZnO-channel thin-film transistors with actively tunable photocurrent in the visible spectrum, although ZnO band edge is in the ultraviolet. ZnO channel is deposited by atomic layer deposition technique at a low temperature (80 <formula formulatype="inline"><tex Notation="TeX">$^{\circ}\hbox{C}$</tex></formula>), which is known to introduce deep level traps within the forbidden band of ZnO. The gate bias dynamically modifies the occupancy probability of these trap states by controlling the depletion region in the ZnO channel. Unoccupied trap states enable the absorption of the photons with lower energies than the bandgap of ZnO. Photoresponse to visible light is controlled by the applied voltage bias at the gate terminal.https://ieeexplore.ieee.org/document/6479671/Metal oxidetunabletransparent oxidevisibledefectstraps |
| spellingShingle | Levent E. Aygun Feyza B. Oruc Fatih B. Atar Ali K. Okyay Dynamic Control of Photoresponse in ZnO-Based Thin-Film Transistors in the Visible Spectrum IEEE Photonics Journal Metal oxide tunable transparent oxide visible defects traps |
| title | Dynamic Control of Photoresponse in ZnO-Based Thin-Film Transistors in the Visible Spectrum |
| title_full | Dynamic Control of Photoresponse in ZnO-Based Thin-Film Transistors in the Visible Spectrum |
| title_fullStr | Dynamic Control of Photoresponse in ZnO-Based Thin-Film Transistors in the Visible Spectrum |
| title_full_unstemmed | Dynamic Control of Photoresponse in ZnO-Based Thin-Film Transistors in the Visible Spectrum |
| title_short | Dynamic Control of Photoresponse in ZnO-Based Thin-Film Transistors in the Visible Spectrum |
| title_sort | dynamic control of photoresponse in zno based thin film transistors in the visible spectrum |
| topic | Metal oxide tunable transparent oxide visible defects traps |
| url | https://ieeexplore.ieee.org/document/6479671/ |
| work_keys_str_mv | AT leventeaygun dynamiccontrolofphotoresponseinznobasedthinfilmtransistorsinthevisiblespectrum AT feyzaboruc dynamiccontrolofphotoresponseinznobasedthinfilmtransistorsinthevisiblespectrum AT fatihbatar dynamiccontrolofphotoresponseinznobasedthinfilmtransistorsinthevisiblespectrum AT alikokyay dynamiccontrolofphotoresponseinznobasedthinfilmtransistorsinthevisiblespectrum |