The following abbreviations for solar-cell technology are commonly used: • a-Si: amorphous silicon; used for thin-film solar cells. • c-Si: crystalline silicon • CI(G)S: collective term for copper-indium-diselenide and copper-indium-disulphide; common for thin-film solar cells. These semiconductors can also be alloyed with gallium (G). • CdTe: cadmium telluride; the third main semiconductor material for thin-film cells....