SOLAR-CELLS BASED ON CUIN(SE, S)2

In this contribution we report on three- and four source evaporation of CuIn(Se, S)2 thin films. The existence of secondary phases as well as texture effects are discussed for these thin films. The quaternary system CuIn(Se, S)2 will be considered regarding incorporation of selenium versus sulphur. Results of heterojunctions completed with (Zn, Cd)S or a composite window consisting of a thin CdS buffer and a highly conductive ZnO window layer will be reported and analyzed. A main feature will be the influence of CuS on the heterojunction and the methods to overcome this problem. Devices with an active area efficiency exceeding 10% could be obtained.