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Photovoltaic Properties of Sintered CdS / CdTe Solar Cells with an Indium‐Tin‐Oxide Electrode

Indium-tin-oxide (ITO) electrodes were applied to sintered all-polycrystalline CdS/CdTe solar cells for large area cell fabrication. The CdS and CdTe layers were prepared by sequentially sintering (CdS+CdCl 2 ) slurry at 600 o C and (Cd+Te) slurry at 625 o C. The length of the cells was fixed at 10 mm and the width was varied from 3 to 9 mm. While the application of ITO did not change the junction properties after a high temperature annealing process, it significantly reduced the series resistance of the cells. As the cell width increased from 3 to 9 mm, the efficiency of CdS/CdTe solar cells with ITO electrode decreased slightly from 10.5 to 9.4%, while that of cells without ITO decreased from 10.4 to 8.4% under the illumination of 50 mW.cm -2