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DhanRanaThesis.pdf (2.24 MB)
ETD Abstract Container
Abstract Header
Electrical transport and photo-induced phenomena in Ga2O3 single crystal
Author Info
Rana, Dhan B
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1529409880030348
Abstract Details
Year and Degree
2018, Master of Science (MS), Bowling Green State University, Physics.
Abstract
Gallium Oxide (Ga2O3) is a highly resistive material because of its wide band gap. However, the conductivity of Edge-defined film-fed growth (EFG) Ga2O3 crystal increased by three orders of magnitude when doped with Sn and the conductivity decreased when doped with Fe. This work presents the first study of photoconductivity in Ga2O3. It has been carried out on Ga2O3 bulk single crystals grown by Czochralski (CZ) method. Illumination by sub-band gap light of 400 nm led to 5 orders of magnitude persistent photoconductivity and 8 orders of magnitude increase in carrier density. Such levels are higher than any reported photoconductivity in bulk materials. However, photoconductivity was only observed in undoped CZ grown bulk crystals. Fe and Mg doping led to an opposite effect and decrease in conductivity upon illumination. Gamma Induced Positron Spectroscopy (GIPS) and Digital Coincidence Doppler Broadening of Positron Annihilation Spectroscopy (CDBPAS) measurement was carried to study the defects in the crystal. Both lifetime and S-parameter values indicated that all Ga2O3 single crystals have the same level of defects regardless of the method of growth.
Committee
Farida Selim, Ph.D. (Advisor)
Marco Nardone, Ph.D. (Committee Member)
Alexey Zayak, Ph.D. (Committee Member)
Pages
65 p.
Subject Headings
Physics
Keywords
Gallium oxide
;
Transparent semiconducting oxide
;
Photoconductivity
;
Persistent photoconductivity
;
Hall effect, GIPS
Recommended Citations
Refworks
EndNote
RIS
Mendeley
Citations
Rana, D. B. (2018).
Electrical transport and photo-induced phenomena in Ga2O3 single crystal
[Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1529409880030348
APA Style (7th edition)
Rana, Dhan.
Electrical transport and photo-induced phenomena in Ga2O3 single crystal.
2018. Bowling Green State University, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1529409880030348.
MLA Style (8th edition)
Rana, Dhan. "Electrical transport and photo-induced phenomena in Ga2O3 single crystal." Master's thesis, Bowling Green State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1529409880030348
Chicago Manual of Style (17th edition)
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Document number:
bgsu1529409880030348
Download Count:
1,897
Copyright Info
© 2018, some rights reserved.
Electrical transport and photo-induced phenomena in Ga2O3 single crystal by Dhan B Rana is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Bowling Green State University and OhioLINK.