Abstract

This paper reports on hydrogenated amorphous silicon (a-Si:H) thin-film transistors (TFTs) processed at 150 °C using plasma-enhanced chemical vapor deposition on polyethylene naphthalate (PEN) transparent plastic substrates. We examine the impact of RF deposition power on film stress of amorphous silicon nitride (a-SiNx:H), and resulting TFT performance. Transistors with the lowest stress nitride, yield the best performance in terms of device mobility (~1.1 cm2/V · S), ON/OFF current ratio (~1010), and gate leakage current (< 0.1 pA). Stable TFTs are demonstrated with a threshold voltage shift of less than 0.8 V following 10 hours of DC bias stress at 10 V.

© 2011 IEEE

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