The effects of process p arameter s on the p hoto-phy sical properties of a nanocrystalline b lue-emitting phosphor

Light emitting diodes (LEDs) as an impor tant class o f lighting devices show high potential for re placement of conventional lighting sources lik e incandesce nt and fluorescent lam ps due to long lifeti me, environmental-friendly affiliation and so o n [۱]. Phosphor is a key material for LEDs to generate desired li ght and proc ess parameters during calcination of these advanced op tical materials may gre atly inFLuence the crystallization, mo rphology a nd photo -physical pr operties. In this study, a series of Eu ۲+-doped SrZn۲Si۲O۷ ph osphors were synthe sized by sol-gel rout e in order to optimiz e the emis sion under a variety of calcination temperatures. In a ddition, a detailed investigation of the effect o f atmosphere on ph otoluminescence propert ies was carried out.

کلیدواژه ها:

Phot oluminescence ، Calcination ، Nanocrystal ، Sol-ge l ، Electronic transitions