Landau levels of the C-exciton in CuInSe2 studied by magneto-transmission

Landau levels of the C-exciton in CuInSe2 studied by magneto-transmission

The electronic structure of the solar cell absorber CuInSe2 is studied using magneto-transmission in thin polycrystalline films at magnetic fields up to 29 T. A, B, and C free excitons are resolved in absorption spectra at zero field and a Landau level fan generated by diamagnetic exciton recombinat...

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Veröffentlicht in:Applied physics letters 2014-10, Vol.105 (14)
Hauptverfasser: Yakushev, M. V., Rodina, A. V., Shuchalin, G. M., Seisian, R. P., Abdullaev, M. A., Rockett, A., Zhivulko, V. D., Mudryi, A. V., Faugeras, C., Martin, R. W.
Format: Artikel
Sprache:eng
Schlagworte:
Absorption spectra
Applied physics
C band
Copper indium selenides
Dependence
Diamagnetism
Electronic structure
Excitons
Magnetic fields
Photovoltaic cells
Solar cells
Thin films
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Zusammenfassung:The electronic structure of the solar cell absorber CuInSe2 is studied using magneto-transmission in thin polycrystalline films at magnetic fields up to 29 T. A, B, and C free excitons are resolved in absorption spectra at zero field and a Landau level fan generated by diamagnetic exciton recombination is observed for fields above 7 T. The dependence of the C band exciton binding energy on magnetic fields, calculated using a hydrogenic approximation, is used to determine the C exciton Rydberg at 0 T (8.5 meV), band gap (1.2828 eV), and hole effective mass mso = (0.31 ± 0.12)m0 for the C valence sub-band.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4897995