Assertion: solar cell's layer | /r/MadeOf | many types of materials
Facets:
Source sentences:
text: The substrate is often glass or stainless-steel, and these semiconducting layers are made of many types of materials including cadmium telluride (CdTe), copper indium diselenide (CIS), copper indium gallium diselenide (CIGS), and amorphous silicon (a-Si).