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CuInSe2 single crystals, grown by the vertical Bridgman technique were studied using polarisation resolved photoluminescence (PL) at cryogenic temperatures. The emission lines related to the first (n = 2) excited states for the A and B free excitons were observed in the PL spectra at 1.0481 and 1.0516 eV, respectively. The spectral positions of these lines were used to estimate accurate values for the A and B exciton binding energies (8.5 and 8.4 meV, respectively), Bohr radii (7.5 nm), band gaps (E-g(A) = 1.050 eV and E-g(B) = 1.054 eV), and the static dielectric constant (11.3) assuming the hydrogenic model.
|Number of pages||2|
|Journal||Japanese Journal of Applied Physics|
|Publication status||Published - May 2011|
- optical properties
- single crystals
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- 1 Finished
Magnetic Field - and Pressure - Optical Effects In CULNSE2 And CULNS2
Martin, R. & Yakushev, M. V.
EPSRC (Engineering and Physical Sciences Research Council)
23/09/07 → 22/01/11