Sharp optical emissions from Cu-rich, polycrystalline CuInSe{sub 2} thin films
- University of Konstanz, Faculty of Physics, P.O. Box 5560, Konstanz (Germany)
Optical properties of Cu-rich CuInSe{sub 2} thin films prepared by the selenization of Cu/In/Cu alloys in a H{sub 2}Se atmosphere have been studied by photoluminescence (PL) spectroscopy. PL spectra of as-grown samples were dominated by transitions due to intrinsic defect levels, which are ascribed to V{sub In} (24 meV), Cu{sub In} (75 meV), and Cu{sub i} (53 meV). After chemical etching (10{percent} KCN), emission lines attributed to free and bound excitonic emissions and their LO phonon replica became visible. Accurate analysis of the peak positions revealed values of 4.3 meV, 1.0441 eV, and 28.7 meV for the binding energy of the free exciton, the band gap, and the value for the LO phonon, respectively. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 467232
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 6 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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