EXTERNAL QUANTUM EFFICIENCY OF A SOLAR CELL ZnO / CdTe: EFFECTS OF EXCITONS BY THE METHOD OF CALCULATING THE DIELECTRIC FUNCTION

The quantum efficiency of the solar cell ZnO / CdTe is studied by simulating through this article. Thus for the return is made to make use of the absorption coefficients of the two semiconductors. . Their expressions are given by the dielectric function ε. The effect of excitons longer present in the ultraviolet band possible to explain the appearance of the quantum efficiency of the solar cell ZnO / CdTe. This enables us with the various transitions well given excitons, optimize the solar cell.