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Optical Properties of Ga2O3 Single Crystal by Floating Zone Method  

Gim, JinGi (Department of Display Science and Engineering, Pukyong National University)
Kim, Jongsu (Department of Display Science and Engineering, Pukyong National University)
Kim, Gwangchul (Physics Department, School of Liberal Arts, KOREATECH Cheonan)
Publication Information
Journal of the Semiconductor & Display Technology / v.20, no.4, 2021 , pp. 78-82 More about this Journal
Abstract
The Ga2O3 single crystal was grown through a floating zone method, and its structural and optical properties were instigated. It has a monoclinic crystal structure with a (100) crystal orientation and an optical band gap energy of 4.6 eV. It showed an average transmittance of 70% in the visible region. At room temperature, its photoluminescent spectrum showed three different peaks: the ultraviolet at 360 nm, the blue-green at 500 nm, and the red peaks at 700 nm. Especially, at liquid nitrogen temperature, the ultraviolet peak was optically active while the others were quenched.
Keywords
$Ga_2O_3$; Single crystal; Floating zone; Image furnace; Photoluminescence; Transmittance; Raman;
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