A cubia, yttria stabilized halnia phosphor, doped with Ce.sup.3+, has beeniscovered. The phosphor has a blue luminescence, peaking at about 4200 A, with a secondary peak in the 3800-4000 A region. The optimum composition is 3hfO.sub.2 :Y.sub.2 O.sub.3 :Ce.sup.3+ where the Ce.sup.3+ dopant ranges from...http://www.google.es/patents/US4295989?utm_source=gb-gplus-sharePatente US4295989 - Luminescent hafnia composition
