논문 해외 국제전문학술지(SCI급) Effects of Hydroxyl Group in AlOx Gate Insulator on the Negative Bias Illumination Instability of In‐Ga‐Zn‐O Thin Film Transistors
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2019-03
- 저자명 Kyoung Woo Park, Gukjin Jeon, Seunghee Lee, Jong Beom Ko, Sang‐Hee K Park
- 학술지명 physica status solidi (a)
- 발행처명 WILEY
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 5
- 원문 링크 https://doi.org/10.1002/pssa.201800737
홈페이지논문 초록 (Abstract)
Effects of hydroxyl group (OH) in the gate insulator (GI) of AlOx formed by atomic layer deposition on the negative bias illumination stress (NBIS) stability of amorphous InGaZnO (a-IGZO) thin film transistors (TFTs) by changing the deposition temperature (Tdep) of the AlOx GI are studied. There are no significant differences in the electrical properties and stabilities of each device, such as field effect mobility (μFE), subthreshold swing (S.S.), turn on voltage (Von), positive bias temperature stress (PBTS), and negative bias temperature stress (NBTS). Meanwhile, the NBIS stability is improved, resulting in Von shift from −4.34 V to −2.48 V as the Tdep of the GI increased. This suggests that as the amount of OH increases in GI, more hole/and or ionized Vo trapping sites are formed in the bulk GI. Based on the energy level in photoluminescence (PL) spectra of ALD AlOx, it is suggested OH related-bulk trapping sites in ALD AlOx as the origin of non-bridging oxygen hole center (NBOHC) in AlOx GI.