  The effects of thickness, doping concentration and recombination of AlSb
films on the performance of CdS/AlSb cells are simulated by one dimensional
simulation program called analysis of microelectronic and photonic
structures(AMPS1D) soft ware to understand the influence of material
characteristic (such as carrier concentration and thickness) on the solar
cells. The methods to improve the performance of CdS/AlSb cells by optimizing
the properties of AlSb have been found. The results show that the thicker AlSb
film can improve the long wave response for the higher short-circuit current
density (Jsc ) of CdS/AlSb solar cells and the higher carrier concentration of
the film can improve open-circuit voltage (Voc ) and fill factor (FF), and its
optical thickness for CdS/AlSb solar cells is in the range of 500nm~2000nm. The
conversion efficiency can be improved from 10.6% to15.3% for introducing
AlSb:Te, AlSb:Cu and ZnTe:Cu thin films to CdS/ AlSb structure. Furthermore,
the thicker AlSb:Te film can improve the short wave response for the higher Jsc
of the cells, and its optical thickness CdS/AlSb:Te/AlSb/ZnTe:Cu solar cells is
in the range of 100nm~200nm. And the lower doping concentration can promote Voc
and FF to improve the characteristic of the cells.
