Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 67, Issue 1-4, Pages 195-201Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0927-0248(00)00281-6
Keywords
CdTe; CSS growth; textured tin oxide (SnO2 : F); ITO
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Thickness reduction of CdTe absorption layer down to 1 mum has been achieved by controlling the temperature profile used during the close-spaced sublimation (CSS) growth. Transparent conducting oxides, such as indium tin oxide (ITO) and textured fluorine doped tin oxide (SnO2:F) films have been investigated as transparent electrodes for such 1-mum-thick CdTe absorption layers to increase the incident light confinement and thus to achieve higher conversion efficiency. The contribution in solar cell performance has been found in the case of textured TCOs with optimum haze ratio (roughness). Conversion efficiencies of 10.6% (V-oc: 0.75 V, J(sc): 22.02 mA/cm(2), FF: 0.64, area: 1 cm(2)) and 11.2% (V-oc: 0.78 V, J(sc): 22.6 mA/cm(2), FF: 0.63) have been achieved for only 0.6-mum-thick CdTe absorption layers with SnO2:F-TCO of 11% and 3% of haze ratios, respectively. (C) 2001 Published by Elsevier Science B.V. All rights reserved.
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