Scandium's use (as a major crop material, not as a dopant) is concentrated in a very bright direction, and it's not too bad to call him the son of light. The first magic weapon of scandium is called scandium sodium lamp, which can be used to bring light to thousands of families. Scandium's second magic weapon is solar photovoltaic cells, which can collect the light scattered on the ground and turn it into power to promote human society. Scandium is the best barrier metal in metal-insulator-semiconductor silicon photovoltaic cells and solar cells.