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Title: The optical and vibrational properties of the quaternary chalcopyrite semiconductor alloy Ag{sub x}Cu{sub 1-x}GaS{sub 2}

Abstract

The absorption, emission and Raman spectra of the quaternary chalcopyrite alloys Ag{sub x}Cu{sub 1-x}GaS{sub 2} have been measured as a function of the Ag concentration. We find strong and highly nonlinear dependence on the alloy concentration in the optical band gap (a large bowing parameter). On the other hand, most of the Raman peaks exhibit either small energy shifts or large broadening with alloying. We conclude that the effect of substitution of the Ag cations by Cu in AgGaS{sub 2} on its band structure cannot be predicted by the simple virtual crystal potential approximation as a result of the large difference in electronegativity and bond length between Ag and Cu. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [2]
  1. Physics Department, Chung-Ang University, Seoul, Korea (Korea, Republic of)
  2. Department of Physics, University of California, Berkeley (United States)
Publication Date:
OSTI Identifier:
20215801
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 8; Other Information: PBD: 15 Apr 2000; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SILVER SULFIDES; COPPER SULFIDES; GALLIUM SULFIDES; RAMAN SPECTRA; CHALCOPYRITE; NONLINEAR OPTICS; ENERGY GAP; VIBRATIONAL STATES; ABSORPTION SPECTRA; EMISSION SPECTRA; EXPERIMENTAL DATA

Citation Formats

Choi, In-Hwan, Eom, Sung-Hwan, Yu, P Y, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720. The optical and vibrational properties of the quaternary chalcopyrite semiconductor alloy Ag{sub x}Cu{sub 1-x}GaS{sub 2}. United States: N. p., 2000. Web. doi:10.1063/1.372419.
Choi, In-Hwan, Eom, Sung-Hwan, Yu, P Y, & Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720. The optical and vibrational properties of the quaternary chalcopyrite semiconductor alloy Ag{sub x}Cu{sub 1-x}GaS{sub 2}. United States. https://doi.org/10.1063/1.372419
Choi, In-Hwan, Eom, Sung-Hwan, Yu, P Y, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720. 2000. "The optical and vibrational properties of the quaternary chalcopyrite semiconductor alloy Ag{sub x}Cu{sub 1-x}GaS{sub 2}". United States. https://doi.org/10.1063/1.372419.
@article{osti_20215801,
title = {The optical and vibrational properties of the quaternary chalcopyrite semiconductor alloy Ag{sub x}Cu{sub 1-x}GaS{sub 2}},
author = {Choi, In-Hwan and Eom, Sung-Hwan and Yu, P Y and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720},
abstractNote = {The absorption, emission and Raman spectra of the quaternary chalcopyrite alloys Ag{sub x}Cu{sub 1-x}GaS{sub 2} have been measured as a function of the Ag concentration. We find strong and highly nonlinear dependence on the alloy concentration in the optical band gap (a large bowing parameter). On the other hand, most of the Raman peaks exhibit either small energy shifts or large broadening with alloying. We conclude that the effect of substitution of the Ag cations by Cu in AgGaS{sub 2} on its band structure cannot be predicted by the simple virtual crystal potential approximation as a result of the large difference in electronegativity and bond length between Ag and Cu. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.372419},
url = {https://www.osti.gov/biblio/20215801}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 8,
volume = 87,
place = {United States},
year = {Sat Apr 15 00:00:00 EDT 2000},
month = {Sat Apr 15 00:00:00 EDT 2000}
}