An Investigation of MOCVD Grown Gallium Oxide

An Investigation of MOCVD Grown Gallium Oxide

Presenter(s)

Carlos DeLeon

Comments

Presentation: 9:00 a.m.-10:15 a.m., Kennedy Union Ballroom

Additional authors:
Carlos R. DeLeon1,2, Adam T. Neal1, Said Elhamri1,2, Erich Steinbrunner1,3, Jessica Hendricks1,4, Josh Melnick1,5

1 Air Force Research Laboratory, Materials and Manufacturing Directorate, Wight Patterson AFB, Ohio.
2 Department of Physics, University of Dayton, 300 College Park, Ohio.
3 Department of Electrical Engineering, Wright State University, 3640 Colonel Glenn Hwy, Ohio.
4 Nonstructural Materials Division, University of Dayton Research Institute, 300 College Park, Ohio.
5 Azimuth, 2970 Presidential Dr Unit 200, Ohio.

Description

Optimizing Gallium Oxide growth conditions will allow better quality material to be used in high power devices. Ideal thin-film Gallium Oxide material improves upon the tradeoff relation between the breakdown voltage and the specific on resistance which results in better performance than ordinary silicon transistors due to Gallium Oxide’s ultra-wide bandgap of 4.8 eV. To improve upon growth parameters, defects within Gallium Oxide must be minimized or prevented. The 100 meV donor defect is a recently new defect detected within the material that currently has no known basis as to what causes its presence. The purpose of this experiment was to see whether increasing the silane flow concentration within the Metal Organic Chemical Vapor Deposition (MOCVD) growth process influences the presence of the 100 meV donor. Both Hall measurements and Thermal Admittance Spectroscopy (TAS) data were used in conjunction to uncover the results of the hypothesis. While some of the samples did have the 100 meV donor appear in the Hall data, there seems to be no systematic trend with the silane flow and the defect according to Hall Effect data. Furthermore, there was not clear evidence of the 100 meV donor in the TAS data, which is still under investigation. The data may suggest no direct relation between Silane flow and the defect regardless of concentration used. An alternative origin for the 100 meV defect could lay in extrinsic impurities or a lattice defect within antisites or intersitials of the substrate, however, further testing is recommended to verify that no relationship between the silane flow concentration and the 100 meV donor exists.

Publication Date

4-20-2022

Project Designation

Independent Research

Primary Advisor

Said Elhamri

Primary Advisor's Department

Physics

Keywords

Stander Symposium project, College of Arts and Sciences

An Investigation of MOCVD Grown Gallium Oxide

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