Journal
IEEE TRANSACTIONS ON ELECTRON DEVICES
Volume 54, Issue 11, Pages 2856-2859Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2007.907126
Keywords
high-kappa gate dielectrics; transparent thin-film transistors (TFTs); ZnMgO
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An enhancement-mode ZnMgO transparent thin-film transistor (TFT) is fabricated, in which cubic-phase ZnMgO (C-ZnMgO) is used as gate insulator and hexagonal-phase ZnMgO (H-ZnMgO) is used as channel. The multilayers of C-ZnMgO and H-ZnMgO are grown on patterned indium-tin-oxide-coated glass in successive fashion at low temperature. Capacitor-voltage characteristics measured across the gate show that the H-ZnMgO channel is n-type. The C-ZnMgO isolating layer demonstrates low leakage current characteristics, i.e., 4 x 10(-7) A/cm(2), at a bias of 10 V. The transparent TFTs display a typical channel mobility of 1.5 cm(2) V-1 s(-1) and an on/off ratio of 10(4).
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