Thin‐film CuInSe2/CdS heterojunction solar cells

The fabrication procedures and characteristics of several thin-film p-CuInSe2/n-CdS heterojunction solar cells are presented. Two modes of operation (illumination through CuInSe2 or through CdS) are discussed. Efficiencies in the range of 4–5% are reported, under 100 mW/cm2 tungsten-halogen illumination for 1.2-cm2 devices. Included are the spectral response and J-V characteristics for these photovoltaic junctions.