Luminescence Properties of Ca[sub 1−x]Sr[sub x](Ga[sub 1−y]Al[sub y])[sub 2]S[sub 4]:Eu[sup 2+] and Their Potential Application for White LEDs

A series of ( , ; , ) phosphors was synthesized by the evacuated sealed quartz ampoule method. X-ray powder diffraction analysis confirmed the formation of the complete solid solutions of and . With the and content increasing, the emission peaks of and show an obvious blueshift in the range of . A tunable bluish-green to greenish-yellow light can be controlled by simply adjusting the content of in and in . All the characteristics indicate that the solid solution phosphors are good phosphor candidates for white light-emitting diodes (LEDs).