Journal
APPLIED PHYSICS LETTERS
Volume 78, Issue 19, Pages 2899-2901Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1371537
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The activation of metalorganic chemical vapor deposition-grown Mg-doped GaN by N-2 annealing with a thin Ni film has been investigated. p-type conduction in GaN has been obtained at an annealing temperature as low as 200 degreesC using the proposed technique. A hole concentration of 2 x 10(17) cm(-3) has been achieved by the annealing at 400 degreesC. Secondary ion mass spectroscopy measurements have revealed that hydrogen is effectively removed from the Mg-doped GaN layer. These results suggest that the Ni film significantly enhances hydrogen desorption from the GaN film, which results in the activation of Mg-doped GaN at quite low temperatures. (C) 2001 American Institute of Physics.
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