1. Analysis of Electron Traps in a-IGZO Thin Films after High Pressure Vapor Annealing by Capacitance–Voltage Method
- Author
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Masahiro Horita, Haruka Yamazaki, Yukiharu Uraoka, Yoshihiro Ueoka, Yasuaki Ishikawa, and Mami N. Fujii
- Subjects
Capacitance voltage ,chemistry.chemical_compound ,Materials science ,chemistry ,Annealing (metallurgy) ,Density of states ,Oxide ,Analytical chemistry ,Electron ,Thin film ,Penning trap ,Water vapor - Abstract
Effect of high-pressure water vapor (HPV) annealing is discussed from density of state (DOS) by capacitance–voltage (C–V) method and ΔVFB by the cyclic C–V measurement. The DOS of HPV samples were smaller than that of conventional atmosphere (AT) annealing around conduction band minimum (Ec). The ΔVFB of HPV samples were also smaller than that of AT. This suggests that HPV annealing is an effective method to decrease electron trap density as compared with AT condition. Especially, HPV 0.5 MPa sample was lower electron trap density and more stable than the other pressure HPV samples. Therefore, it is considered that the HPV in 0.5 MPa is the most promising condition. In addition, we succeeded in demonstrating the analysis of trap density in thin film by C–V method and cyclic C–V measurement.
- Published
- 2012
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