CUED Publications database

Stability under Gate Bias Stressing of Amorphous Oxide Thin Film Transistors

Niang, KM and Flewitt, AJ (2016) Stability under Gate Bias Stressing of Amorphous Oxide Thin Film Transistors. In: UNSPECIFIED pp. 179-187..

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Abstract

Stability of amorphous zinc tin oxide thin film transistors (TFTs) is investigated under positive bias stressing (PBS) at temperatures between 65 and 105 °C. The time and temperature dependence of the threshold voltage shift is analyzed using a thermalization energy concept. A maximum energy barrier to defect migration of 0.76 eV and the attempt-to-escape frequency of 10$^7$ s$^{-1}$ are extracted. These values are compared with those under PBS of amorphous indium gallium zinc oxide and hydrogenated amorphous silicon TFTs. The oxygen vacancy migration model that was proposed for amorphous oxide semiconductors is contrasted with the defect creation model that was proposed for amorphous silicon.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:00
Last Modified: 23 Nov 2017 03:40
DOI: