Email this article Excitons in PL Spectra of Cu(In,Ga)Se2 Single Crystals
- Authors: Skidchenko E.1,2,3, Yakushev M.V.4,5,6, Spasevski L.2, Edwards P.R.2, Sulimov M.A.4,5, Martin R.W.2
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Affiliations:
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Centre
- Department of Physics, SUPA, University of Strathclyde
- Department of Plasma Technology and Nanotechnology of High Molecular Weight Materials, Kazan National Research Technological University
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Ural Federal University Named after the First President of Russia B.N. Yeltsin
- Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
- Issue: Vol 61, No 5 (2019)
- Pages: 918-924
- Section: Optical Properties
- URL: https://ogarev-online.ru/1063-7834/article/view/205645
- DOI: https://doi.org/10.1134/S1063783419050330
- ID: 205645
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Abstract
A photoluminescence (PL) study of Cu(In,Ga)Se2 (CIGSe) single crystals, (grown by the vertical Bridgman technique) with the [Ga]/[Ga + In] ratio of 7 and 12% and the [Cu]/[In + Ga] ratio greater than unity, as measured by energy dispersive spectroscopy, is presented. Analysis of the excitation intensity and temperature dependence of the PL spectra suggested the excitonic nature of the observed near-band-edge emissions peaks. Free and bound excitons in CIGSe single crystals with both 7 and 12% Ga content are clearly observed, analyzed and identified. An activation energy of 19 meV is determined for the free exciton in the PL spectra of the sample with 12% Ga. The presence of the excitons demonstrated a high structural quality of the material.
About the authors
E. Skidchenko
Skolkovo Institute of Science and Technology, Skolkovo Innovation Centre; Department of Physics, SUPA, University of Strathclyde; Department of Plasma Technology and Nanotechnology of High Molecular Weight Materials,Kazan National Research Technological University
Email: sulimov.m.a@gmail.com
Russian Federation, Moscow; Glasgow, G4 0NG; Kazan
M. V. Yakushev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin; Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Email: sulimov.m.a@gmail.com
Russian Federation, Yekaterinburg; Yekaterinburg; Yekaterinburg
L. Spasevski
Department of Physics, SUPA, University of Strathclyde
Email: sulimov.m.a@gmail.com
United Kingdom, Glasgow, G4 0NG
P. R. Edwards
Department of Physics, SUPA, University of Strathclyde
Email: sulimov.m.a@gmail.com
United Kingdom, Glasgow, G4 0NG
M. A. Sulimov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Ural Federal University Named after the First President of Russia B.N. Yeltsin
Author for correspondence.
Email: sulimov.m.a@gmail.com
Russian Federation, Yekaterinburg; Yekaterinburg
R. W. Martin
Department of Physics, SUPA, University of Strathclyde
Email: sulimov.m.a@gmail.com
United Kingdom, Glasgow, G4 0NG
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