article: Band gap
links: Cadmium telluride Germanium New Jersey Luminescence Boltzmann constant Silicon Nucleus (physics) Selenium Aluminium arsenide Cadmium sulfide Lead(II) sulfide Aluminium antimonide Gallium(III) arsenide Insulator (electricity) Solar cell Diamond Electron shell Electrical conductor Valence electron Copper(II) oxide Atomic nucleus Electrical insulator Zinc sulfide Copper(I) oxide Zinc oxide