상세정보
학술지
Impact of Device Configuration on the Temperature Instability of Al-Zn-Sn-O thin Film Transistors
- 발행일
- 200910
- 출처
- Applied Physics Letters, v.95 no.12, pp.123505-1-123505-3
- ISSN
- 0003-6951
- 출판사
- American Institute of Physics (AIP)
- 초록
- We compared the effect of the temperature on the device stability of Al-Zn-Sn-O (AZTO) thin film transistors (TFTs) with top gate and bottom gate architectures. While the bottom gate device without any passivation layer on the AZTO channel layer showed a large threshold voltage (Vth) shift of 1.6 V after heating it from 298 to 398 K, the naturally passivated top gate device exhibited a smaller Vth shift of 0.6 V. This different behavior is discussed based on the concept of the thermal activation energy of the subthreshold drain current. It is proposed that the suitable passivation and lower interfacial trap density for the top gate TFT are responsible for its superior temperature stability compared to the bottom gate device. © 2009 American Institute of Physics.
- KSP 제안 키워드
- Al-Zn, Bottom gate, Channel layer, Device configuration, Device stability, Drain current, Interfacial trap, Temperature stability, Thermal activation energy, Thin-Film Transistor(TFT), Vth shift