Abstract: | CuInSe2/CdS thin-film heterojunction solar cells were fabricated entirely by chemical bath deposition technique. The illuminated J−V characteristics of the devices prepared with different thicknesses of CdS and CuInSe2 were studied. The typical solar cell parameters obtained for the best cell are: Voc = 365 mV, Jsc = 12 mA/cm2, FF = 61%, and η = 3.1% under an illumination of 85 mW/cm2 on a cell of active area 0.1 cm2. The J−V and C−V characteristics under dark condition and the spectral response were also studied for the best cell. The diode quality factor obtained is 1.7. |