Excitons in PL Spectra of Cu(In,Ga)Se2 Single Crystals
Creators
- 1. Skolkovo Institute of Science and Technology, Skolkovo Innovation Centre (Russian Federation)
- 2. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences (Russian Federation)
- 3. Department of Physics, SUPA, University of Strathclyde (United Kingdom)
Description
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.
Additional details
Identifiers
Publishing Information
- Journal Title
- Physics of the Solid State
- Journal Volume
- 61
- Journal Issue
- 5
- Journal Page Range
- p. 918-924
- ISSN
- 1063-7834
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 51089150
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ACTIVATION ENERGY; COPPER SELENIDES; CRYSTAL GROWTH; EXCITONS; MEV RANGE; MONOCRYSTALS; PHOTOLUMINESCENCE; SPECTROSCOPY; TEMPERATURE DEPENDENCE
- Descriptors DEC
- CHALCOGENIDES; COPPER COMPOUNDS; CRYSTALS; EMISSION; ENERGY; ENERGY RANGE; LUMINESCENCE; PHOTON EMISSION; QUASI PARTICLES; SELENIDES; SELENIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2019 Pleiades Publishing, Ltd.