Analysis of the transient body effect model for an LTPS TFT on a plastic substrate
- 주제(키워드) Body effect , Flexible display , LTPS TFT , Polyimide , PI , Simulation guideline , SPICE model , Transient body effect
- 등재 SCIE, SCOPUS
- 발행기관 Elsevier Ltd
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000175658
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.sse.2020.107948
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
This work investigates the transient current in the subthreshold region of a low-temperature polycrystalline silicon thin-film transistor (LTPS TFT) on a polyimide (PI) substrate. The measurement of this current shows an instability that is not seen in the device on a glass substrate; the instability appears as a current variation under constant voltage and overshoot or undershoot under external stress voltage transitions. To explain this effect for a TFT on a PI substrate, a transient body effect (TBE) is suggested due to a threshold voltage shift caused by the charge distribution inside the substrate. A SPICE model is proposed based on this concept, and it shows excellent agreement with device measurements. The model offers a simulation guideline for LTPS TFTs on PI substrates. © 2020 Elsevier Ltd
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