There are four types of solar panels: monocrystalline, polycrystalline, amorphous, and thin film. Monocrystalline panels are made from a single sheet of material, and polycrystalline panels are made from several sheets of material that have been cut together and then baked at high heat to fuse them; amorphous solar panels consist of large areas of randomly shaped small crystals rather than single large crystals like in solar glass or crystalline silicon cells, and the thin film is a newer type of panel that is made from tiny pieces of polished metal or plastic that are placed on top of one another to create an effect similar to mosaic art.