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Excited states of the A and B free excitons in CuInSe2

Yakushev, Michael V. and Luckert, Franziska and Faugeras, Clement and Karotki, Anatoli V. and Mudryi, Alexander V. and Martin, Robert W. (2011) Excited states of the A and B free excitons in CuInSe2. Japanese Journal of Applied Physics, 50 (5). -. ISSN 0021-4922

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Abstract

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.

Item type: Article
ID code: 34032
Keywords: optical properties, single crystals, Physics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Technology and Innovation Centre > Bionanotechnology
Technology and Innovation Centre > Photonics
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Depositing user: Pure Administrator
Date Deposited: 18 Nov 2011 05:21
Last modified: 27 Mar 2014 09:38
URI: http://strathprints.strath.ac.uk/id/eprint/34032

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