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Gallium Compounds
   Copper indium gallium selenide (CIGS)
   Gallium Gadolinium Garnet
Copper indium gallium selenide (CIGS) Cu(Ga,In)Se2
CIGS is a new semiconductor used mainly in photovoltaic cells (CIGS cells).
CIGS solar cells are not as efficient as crystalline silicon solar cells, but they are expected to be substantially cheaper. CIGS can be printed directly onto molybdenum coated glass sheets. Solar cells made from crystalline silicon are made of slices of solid silicon and require therefore more expensive semiconductor material.
Gallium Gadolinium Garnet Gd3Ga5O12)
A material with good mechanical, thermal, and optical properties. It is typically colourless. It is used in fabrication of various optical components and as substrate material for magneto-optical films. It also finds use in jewellery as a diamond simulant.