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High frequency characteristics of tin oxide thin films on Si
(PERGAMON-ELSEVIER SCIENCE LTD, 2008) Yueksel, Oe. Faruk; Ocak, S. B.; Selcuk, A. B.
High frequency characteristics of tin oxide (SnO2) thin films were studied. SnO2 thin films have been successfully grown on n-type Si (111) substrates by using a spray deposition technique. The capacitance-voltage (C-V) and conductance-voltage (G/omega-V) characteristics of the metal-oxide-semiconductor (Au/SnO2/n-Si) Schottky diodes were investigated in the high frequency range from 300 kHz to 5 MHz. It has been shown that the interface state density, D-it, ranges from 2.44 x 10(13) cm(-2) eV(-1) at 300 kHz to 0.57 x 10(13) cm(-2) eV(-1) at 5 MHz and exponentially decreases with increasing frequency. The C-V and G/omega-V characteristics confirm that the interface state density and series resistance of the diode are important parameters that strongly influence the electrical parameters exhibited by the metaloxide-semiconductor structure. (C) 2008 Elsevier Ltd. All rights reserved.