Abnormal behavior with hump characteristics in current stressed a-InGaZnO thin film transistors
SCIE
SCOPUS
- Title
- Abnormal behavior with hump characteristics in current stressed a-InGaZnO thin film transistors
- Authors
- Kim, W.-S.; Cho, Y.-J.; Lee, Y.-H.; Park, J.; Kim, G.; Kim, O.
- Date Issued
- 2017-11
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- We investigated the degradation mechanism of a-InGaZnO TFTs under simultaneous gate and drain bias stress. Gate and drain bias of 20 V were applied simultaneously to induce current stress, and abnormal turn-around behavior in transfer characteristics with a hump phenomenon were identified. Hump characteristics were interpreted in terms of parasitic current path, and the degradation itself was found to be caused dominantly by the electrical field and to be accelerated with current by Joule heating. The mechanism of asymmetrical degradation after current stress was also investigated. By decomposing the curves into two curves and measuring the relaxation behavior of the stressed TFTs, we also found that abnormal turn-around behavior in the transfer characteristics was related to acceptor-like states. ? 2017 Elsevier Ltd
- Keywords
- Degradation; Drain current; Joule heating; Plasma stability; Thin film circuits; Current stress; Degradation mechanism; Hump; Hump characteristic; IGZO; Relaxation behaviors; Transfer characteristics; Turn-arounds; Thin film transistors
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/91982
- DOI
- 10.1016/j.sse.2017.08.001
- ISSN
- 0038-1101
- Article Type
- Article
- Citation
- SOLID-STATE ELECTRONICS, vol. 137, page. 22 - 28, 2017-11
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- There are no files associated with this item.
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