Characterization of the SnO2 Based Thin Film Transistors with Ga, In and Hf Doping
- Title
- Characterization of the SnO2 Based Thin Film Transistors with Ga, In and Hf Doping
- Author
- 박종완
- Keywords
- Thin Film Transistors; Oxide Semiconductors; Doping Impurity
- Issue Date
- 2012-07
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Citation
- Journal of Nanoscience and Nanotechnology, 2012, 12(7), P.5459~5522
- Abstract
- We investigated the effects of doping tin oxide thin film transistors (TFTs) with Ga, In, and Hf. The quantity of doping impurities added to the SnO2-TFT channel layer was as follows: Ga (6.3-21.4 at.%), In (9.6-55.6 at.%), and Hf (1.2-2.7 at.%). Hafnium and gallium doping of SnO2 thin film decreased the carrier concentration, possibly due to a decrease in field effect mobility, and reduced oxygen vacancy-related defects. Indium-doped SnO2-TFTs exhibited high performance with a high field-effect mobility of > 20 cm(2) V-1 s(-1). The current on/off ratio and the subthreshold swing of In-doped SnO2-TFTs was 1 x 10(9) and 0.5 V/decade, respectively. These results demonstrate that Ga, In, and Hf doping can effectively enhance the performance of SnO2-based TFT devices.
- URI
- http://www.ingentaconnect.com/content/asp/jnn/2012/00000012/00000007/art00059http://hdl.handle.net/20.500.11754/66395
- ISSN
- 1533-4880
- DOI
- 10.1166/jnn.2012.6244
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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