Share Email Print
cover

Proceedings Paper

Gallium K-edge EXAFS study of GaN:Mg films
Author(s): YungChung Pan; ShuFang Wang; WenHsiung Lee; WeiCherng Lin; ChenKe Shu; Chung-I Chiang; ChinHwa Lin; Horng Chang; JyhFu Lee; LingYun Jang; DengSung Lin; MingChih Lee; WenHsiung Chen; WeiKuo Chen
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Ga K-edge extended X-ray absorption fine structure (EXAFS) measurement was employed to investigate the local structure and GaN:Mg films grown my metalorganic vapor phase epitaxy (MOVPE) with various Cp2Mg dopant flow rates using both in-plane and out-of-plane polarization modes of X-rayu. The near edge absorption spectra were found to depend on X-ray polarization strongly for undoped GaN sample and weakly to minutely for heavily Mg-doped and amorphous films. The results indicate Mg incorporation modifies the local structure around the absorber Ga atom and, hence, alters the molecular orbital electron transition of GaN sample. EXAFS analysis shows both vacancy an dMg-interstitial defects contribute to the reduction of coordination numbers along the hexagonal c-axis of GaN:Mg film.

Paper Details

Date Published: 11 July 2000
PDF: 9 pages
Proc. SPIE 4078, Optoelectronic Materials and Devices II, (11 July 2000); doi: 10.1117/12.392184
Show Author Affiliations
YungChung Pan, National Chiao Tung Univ. (Taiwan)
ShuFang Wang, National Chiao Tung Univ. (Taiwan)
WenHsiung Lee, National Chiao Tung Univ. (Taiwan)
WeiCherng Lin, National Chiao Tung Univ. (Taiwan)
ChenKe Shu, National Chiao Tung Univ. (Taiwan)
Chung-I Chiang, Chung Shan Institute of Science and Technology (Taiwan)
ChinHwa Lin, Chung Shan Institute of Science and Technology (Taiwan)
Horng Chang, Chung Shan Institute of Science and Technology (Taiwan)
JyhFu Lee, Synchrotron Radiation Research Ctr. (Taiwan)
LingYun Jang, Synchrotron Radiation Research Ctr. (Taiwan)
DengSung Lin, National Chiao Tung Univ. (Taiwan)
MingChih Lee, National Chiao Tung Univ. (Taiwan)
WenHsiung Chen, National Chiao Tung Univ. (Taiwan)
WeiKuo Chen, National Chiao Tung Univ. (Taiwan)


Published in SPIE Proceedings Vol. 4078:
Optoelectronic Materials and Devices II
Yan-Kuin Su; Pallab Bhattacharya, Editor(s)

© SPIE. Terms of Use
Back to Top