Bridge Action of Double-Deck Films Interface Electrons

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When both SnO2 film and a-Si film with infinite square resistance are deposited on an ITO film, the square resistance of the ITO film notably decreases. This phenomenon is more remarkable, when an ITO film has large square resistance. We believe that the films are composed of spaced crystalline grains. The film resistance is due to crystal boundary scattering carriers. Smaller crystalline grain and greater distance to the crystal boundary lead to fiercer scattering. The crystalline grains of the SnO2 film and a-Si film short-circuit the spaced ITO grains to form bridges so interface electrons can flow trough.

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1038-1042

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November 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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