Ternary Semiconductor AGS Thin Films

Ternary Semiconductor AGS Thin Films

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A very challenging technology is based on the ternary compound semiconductors: CIS, CGS, AIS, AGS and their multinary alloys. It became evident that CIS process technology is very flexible with respect to process conditions. Establishing a well-controlled system for multisource coevaporation by Boeing made the CIS cell soon the front-runner with respect to thin-film solar cell efficiencies. In later developments the addition of Ga helped to increase the efficiency. One of the problems with CIS is that its band gap energy is somewhat low to match the optimum solar spectrum. Apart from that, cop...