CuGaSe sub(2) solar cells prepared by MOVPE

Metal organic vapor-phase epitaxy (MOVPE) is used to prepare epitaxial reference films and solar cells based on CuGaSe sub(2). Room temperature Hall measurements are performed on epitaxial CuGaSe sub(2). Conductivities up to 0.7( Omega cm) super(-1) were obtained. Highest mobilities of 270 cm super(...

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Bibliographic Details
Published in:Solar energy materials and solar cells 2001-03, Vol.67 (1-4), p.129-136
Main Authors: Siebentritt, S, Bauknecht, A, Gerhard, A, Fiedeler, U, Kampschulte, T, Schuler, S, Harneit, W, Brehme, S, Albert, J, Lux-Steiner, M Ch
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Language:English
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Summary:Metal organic vapor-phase epitaxy (MOVPE) is used to prepare epitaxial reference films and solar cells based on CuGaSe sub(2). Room temperature Hall measurements are performed on epitaxial CuGaSe sub(2). Conductivities up to 0.7( Omega cm) super(-1) were obtained. Highest mobilities of 270 cm super(2)/Vs are observed for near stoichiometric slightly Ga-rich films. Net charge carrier concentration is higher in the Cu-rich grown films than in the Ga-rich films. Solar cells with epitaxial absorber are prepared that reach efficiencies of 3.3%. First polycrystalline solar cells are grown on Mo/glass at reduced substrate temperatures. Under AM1.5 illumination open-circuit voltages up to 740 mV and efficiencies of 2.0% are obtained.
ISSN:0927-0248