The influence of sputtering power and O2/Ar flow ratio on the performance and stability of Hf–In–Zn–O thin film transistors under illumination

Hyun-Suk Kim; Kyung-Bae Park; Kyoung Seok Son; Park, Joon Seok; Wan-Joo Maeng; Tae Sang Kim; Kwang-Hee Lee; Eok Su Kim; Jiyoul Lee; Joonki Suh; Jong-Baek Seon; Myung Kwan Ryu; Sang Yoon Lee; Kimoon Lee; Seongil Im
September 2010
Applied Physics Letters;9/6/2010, Vol. 97 Issue 10, p102103
Academic Journal
The performance and stability of amorphous HfInZnO thin film transistors under visible light illumination were studied. The extent of device degradation upon negative bias stress with the presence of visible light is found to be strongly sensitive to the extent of photoelectric effect in the oxide semiconductor. Highly stable devices were fabricated by optimizing the deposition conditions of HfInZnO films, where the combination of high sputtering power and high O2/Ar gas flow ratio was found to result in the highest stability under bias stress experiments.


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