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Agus Subekti
Department of Physics Faculty of Mathematics and Natural Sciences The University of Jember Jl. Kalimantan 37 Kampus Tegalboto Jember 68121
Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

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Effect of Growth Temperature on Electrical Properties of p-Gab/n-GaAs Heterointerfaces Grown by Metalorganic Chemical Vapour Deposition. Agus Subekti
Indonesian Journal of Physics Vol 14 No 4 (2003): IJP Vol. 14 No. 4, October 2003
Publisher : Institut Teknologi Bandung

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Abstract

Electrical characterization of heterojunction diodes between p-GaSb/n-GaAs grown by metalorganic chemical vapour deposition have been investigated. At growth temperatures of 540oC and 580oC, the interface region of GaAs show n-type doping level of 5 × 1017 and 2 × 1018 cm-3, respectively. The heating process during GaSb growth was likely responsible for the change of the doping level of the sub-surface region in GaAs due to the loss of stochiometry at the GaAs surface. This doping changes the apparent barrier heights, as well as the interface band diagram. Distinct differences appear between diodes grown on the two sides of the growth window, at 540oC and at 580 oC, with the barrier height changing from 0.92 eV to 0.29 eV.
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