Cu2ZnSnS4 absorber layers deposited by spray pyrolysis for advanced photovoltaic technology
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE(2015)
Abstract
In this work, pneumatic spray pyrolysis was used to deposit Cu2ZnSnS4 kesterite thin film layers onto soda lime glass substrates/Mo coated substrates (substrate configuration). Furthermore, pneumatic spray pyrolysis was also tested as a potential way to grow kesterite thin film layers on ZnO nanorod arrays on SnO2:F coated glass substrates (superstrate cell configuration). In this case semi-transparent samples were obtained. A summary of the process parameters optimization to effectively coat the ZnO nanostructures is presented. In both solar cell configurations, absorbers were selenized at 400-500 degrees C and compared. For the substrate configuration, we present a device with a power conversion efficiency of 1.86%, V-oc = 292 mV, J(sc) = 16.2 mA/cm(2) and FF = 39.6%. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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Key words
Cu2ZnSnS4,kesterites,nanorods,solar cells,spray pyrolysis,ZnO
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