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Home  >  Volume 36 (no2)

EFFECTS OF METAL BACK CONTACTS ON THE EFFICIENCIES OF CdS/CdTe THIN FILM SOLAR CELLS BY Salawu M. A, Alabi A. B, Ajayi A. A and Akomolafe T.(pages 337-342)
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ABSTRACT

Device simulation is used to investigate the effects of metal back contacts on the performance of CdS/CdTe thin film solar cells at different working temperatures. The simulations were done for chemical and physical based deposition techniques. The working temperatures studied ranges from 300 to 600K for Copper, Cobalt and Platinum back contacts using standard SCAPS 3.3.03 version software. Thin film solar cells with Platinum back contact of work function of 5.6eV exhibited better efficiency 17.24% at working temperature 350K with chemical method and 18.54% at 300K for physical method. Cobalt with metal work function of 5.0eV had 5.66% efficiency at working temperature 400K with chemical method and 6.58% at working temperature 300K for physical method. Copper with work function of 4.7eV showed the least efficiencies of 0.81 and 0.73% for chemical and physical method respectively at the same working temperature of 300K. The right metal work function should be selected as back contact electrode and using back contact buffer is encouraged to enhance the efficiency.  

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