Influence of indium-tin-oxide thin-film quality on reverse leakage current of indium-tin-oxide/n-GaN Schottky contacts

R. X. Wang, S. J. Xu, A. B. Djurišić, C. D. Beling, C. K. Cheung, C. H. Cheung, S. Fung, D. G. Zhao, H. Yang, Xiaoming Tao

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11 Citations (Scopus)

Abstract

Indium-tin-oxide (ITO)/n-GaN Schottky contacts were prepared by e-beam evaporation at 200°C under various partial pressures of oxygen. X-ray photoemission spectroscopy and positron beam measurements were employed to obtain chemical and structural information of the deposited ITO films. The results indicated that the observed variation in the reverse leakage current of the Schottky contact and the optical transmittance of the ITO films were strongly dependent on the quality of the ITO film. The high concentration of point defects at the ITO-GaN interface is suggested to be responsible for the large observed leakage current of the ITO/n-GaN Schottky contacts.
Original languageEnglish
Article number033503
JournalApplied Physics Letters
Volume89
Issue number3
DOIs
Publication statusPublished - 28 Jul 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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