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Extraction Technique of Trap Densities in Thin Films and at Insulator Interfaces of Thin-Film Transistors

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1 Author(s)
Kimura, M. ; Dept. of Electron. & Inf., Ryukoku Univ., Otsu, Japan

We have developed an extraction technique of trap densities in thin films and at insulator interfaces of thin-film transistors (TFTs). These trap densities can be extracted and separated from capacitance-voltage and current-voltage characteristics by numerically calculating , Poisson equation, carrier density equations, and Gauss' law. The outstanding advantages are intuitive understandability and a simple algorithm. The validity is confirmed using device simulation, and actual trap densities are extracted for a high-temperature poly-Si TFT.

Published in:

Electron Device Letters, IEEE  (Volume:31 ,  Issue: 6 )