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Effects of magnetic fields on free excitons in CuInSe2

Yakushev, M. V. and Martin, R. W. and Babinski, A. and Mudryi, A. V. (2009) Effects of magnetic fields on free excitons in CuInSe2. Physica Status Solidi C, 6 (5). pp. 1086-1088. ISSN 1862-6351

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Abstract

The effects of magnetic fields up to 20 T were studied in CuInSe2 single crystals using photoluminescence (PL) at 4.2 K. Diamagnetic shifts of the free A and B excitons measured in the PL spectra in CuInSe2 at 4.2 K tinder the magnetic fields were used to estimate the reduced masses (0.095m(0) for the A and 0.098m(0) for the B exciton), binding energies (7.0 meV for the A and 7.2 meV for the B exciton) and Bohr radii (7.6 nm for the A and 7.3 nm for the B exciton) of the free-excitons in CuInSe2 assuming that both excitons are isotropic and hydrogen-like. (C) 2009 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim