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The fabrication procedure of transparent and conducting ZnO films yielding ohmic contacts to p-GaN has been developed. The microstructure and electronic properties of p-GaN/ZnO interface were studied using atomic force and electron transmission microscopies, and X-ray photoelectron spectrometry. The observed ohmic behaviour is explained in terms of formation of a tunnelling p-GaN/ n+-ZnO junction.
Date of Conference: 11-13 Dec. 2002