amorphous silicon

Amorphous silicon is a nonmetallic chemical element that exists in a disordered, non-crystalline structure. Unlike crystalline silicon, which has a highly ordered atomic arrangement, amorphous silicon lacks long-range atomic order. This structural difference impacts its properties, such as lower electrical and thermal conductivity compared to its crystalline counterpart.12

Amorphous silicon can be prepared using vapor condensation techniques, where atoms are deposited atom-by-atom from the gas phase onto a cold substrate. Hydrogenated amorphous silicon, which contains hydrogen to reduce electronic defects, is particularly important. This material is widely used in electronic applications like solar cells, copiers, and flat-panel displays due to its ability to form large-area thin films and its semiconducting properties.32