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Polycrystalline silicon films and thin-film transistors using solution-based metal-induced crystallization

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6 Author(s)

Polycrystalline silicon (poly-Si) films consisting of dish-like and wadding-like domains were obtained with solution-based metal-induced crystallization (SMIC) of amorphous silicon. The Hall mobility of poly-Si was much higher in dish-like domains than in wadding-like domains. Thin-film transistors (TFTs) have been prepared using those two kinds of poly-Si films as the active layer, followed by the phosphosilicate glass (PSG) nickel gettering. The field effect mobility of dish-like domain poly-Si TFTs and wadding-like poly-Si TFTs were 70~80 cm2/Vmiddots and 40~50 cm2/Vmiddots, respectively. With a multi-gate structure, the leakage current of poly-Si TFTs was reduced by 1 to 2 orders of magnitude. In addition, the gate-induced drain leakage current (GIDL) and uniformity of the drain current distribution were also improved. P-type TFTs fabricated using SMIC exhibited excellent reliability

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Display Technology, Journal of  (Volume:2 ,  Issue: 3 )