p-cds/n-Si Anisotype Heterojunction solar cells wih Efficiency of 6.4%

Abstract

In the present paper, p-CdS/n-Si heterojunction solar cells are prepared for the first time by the spray pyrolysis technique. Using such low-cost method, cells with 6.4'/o AM1 conversion efficiency ina O.ZZ fill factor have been made. The forward current of the prepared cells is dominated by the tunneling-recombination mechanism. Spectral response measurements revealed that these cells exhibit a wide spectral response (400-1150 nm) with two distinct peaks, the first at l.:550nm, while the second at ).:800nm. Photo-induced open-circuit voltage decay technique illustrated that the minority carriers lifetime of these cells is around 20ps