Hydrogen passivation of calcium and magnesium doped [beta]-Ga2O3

Jacob R. Ritter; Kelvin G. Lynn; Matthew D. McCluskey

doi:10.1117/12.2507187

1 March 2019 Hydrogen passivation of calcium and magnesium doped β-Ga₂O₃

Jacob R. Ritter, Kelvin G. Lynn, Matthew D. McCluskey

Proceedings Volume 10919, Oxide-based Materials and Devices X; 109190Z (2019) https://doi.org/10.1117/12.2507187
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

Calcium and magnesium doped beta-phase gallium oxide (β-Ga₂O₃) single crystals were Czochralski grown in an iridium crucible and subsequently annealed in hydrogen at ~800° C. IR spectroscopy was used to investigate the roles of Mg and Ca dopants as well as H and Ir impurities. An IR peak at 3492 cm^-1 was previously assigned to an O-H bondstretching mode of a MgH complex in hydrogen-annealed Ga₂O₃:Mg and an IR peak at 3541 cm^-1 is tentatively assigned to a similar mode in a CaH complex for H annealed Ga₂O₃:Ca. An IR peak at 5148 cm^-1 is attributed to the presence of Ir⁴⁺ when magnesium is present. Excitation with several different wavelengths was used to confirm the position of the Ir level within the band gap. Our results suggest that isolated substitutional Ca dopants are less effective as deep acceptors than Mg. Polarization dependence of the iridium IR spectra is also discussed.

Conference Presentation

Citation Download Citation

Jacob R. Ritter, Kelvin G. Lynn, and Matthew D. McCluskey "Hydrogen passivation of calcium and magnesium doped β-Ga₂O₃", Proc. SPIE 10919, Oxide-based Materials and Devices X, 109190Z (1 March 2019); https://doi.org/10.1117/12.2507187

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available