Thesis Title

The Growth and Characterization of Gan Thin Films on Sic Substrates

Author

Ailing Cai

Date of Graduation

Spring 2000

Degree

Master of Science in Materials Science

Department

Physics, Astronomy and Materials Science

Committee Chair

Shyang Hwang

Subject Categories

Materials Science and Engineering

Abstract

Optical devices based on III-V nitrides operating in the visible region involve GaN based materials. The development of such devices first requires the optimization of GaN crystal quality. This thesis addresses issues related to substrate cleaning and growth of high quality GaN on C-terminated 6H-SiC substrates by molecular beam epitaxy. Good substrate cleaning methods by H₂: He (1:1) plasma at 940°C for 100 minutes have been used to obtain GaN thin films with excellent structural and optoelectronic properties. The full-width at half-maximum values of the x-ray diffraction and photoluminescence peaks are about 90 arc-second and 1.4 meV at 4.2K for C-termnated 6H-SiC substrates, respectively.

Copyright

© Ailing Cai

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