Uses of Europium
Europium oxide (europia) is widely used as a doping agent in phosphors in television sets and computer monitors: valency three europium produces a red radiance and valency two europium produces a blue radiance. When both valencies are combined a white light is produced which is used in compact fluorescent bulbs.
Europium is also used in phosphors in anti-forgery marks on Euro bank notes.
Europium isotopes are good neutron absorbers and are used in nuclear reactor control rods.