Optical properties of high quality Cu{sub 2}ZnSnSe{sub 4} thin films

Journal Article · Mon Aug 08 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3624827· OSTI ID:22027705

Luckert, F; Hamilton, D I; Yakushev, M V; Martin, R W ^[1]; Beattie, N S; Zoppi, G; Moynihan, M; Forbes, I ^[2]; Karotki, A V ^[3]; Mudryi, A V ^[1]; Grossberg, M; Krustok, J ^[4]

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1. Department of Physics, SUPA, Strathclyde University, G4 0NG Glasgow (United Kingdom)
2. Northumbria Photovoltaics Applications Centre, Northumbria University, Ellison Building, Newcastle upon Tyne NE1 8ST (United Kingdom)
3. Scientific-Practical Material Research Centre of the National Academy of Science of Belarus, P. Brovki 19, 220072 Minsk (Belarus)
4. Tallinn University Technology, Ehitajate tee 5, Tallinn 19086 (Estonia)

Cu{sub 2}ZnSnSe{sub 4} thin films, fabricated on bare or molybdenum coated glass substrates by magnetron sputtering and selenisation, were studied by a range of techniques. Photoluminescence spectra reveal an excitonic peak and two phonon replicas of a donor-acceptor pair (DAP) recombination. Its acceptor and donor ionisation energies are 27 and 7 meV, respectively. This demonstrates that high-quality Cu{sub 2}ZnSnSe{sub 4} thin films can be fabricated. An experimental value for the longitudinal optical phonon energy of 28 meV was estimated. The band gap energy of 1.01 eV at room temperature was determined using optical absorption spectra.

• OSTI ID: 22027705
• Journal Information: Applied Physics Letters, Vol. 99, Issue 6; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
COPPER SELENIDES
DEPOSITION
EMISSION SPECTROSCOPY
ENERGY GAP
EV RANGE
EXCITONS
GLASS
MOLYBDENUM
OPTICAL PROPERTIES
PHONONS
PHOTOIONIZATION
PHOTOLUMINESCENCE
RAMAN SPECTRA
SEMICONDUCTOR MATERIALS
SPUTTERING
SUBSTRATES
THIN FILMS
TIN SELENIDES
ZINC COMPOUNDS