Optoelectronics Letters, Volume. 11, Issue 6, 426(2015)
Luminescent properties of blue emitting phosphor SrZn2(PO4)2:Eu2+for white LEDs
Blue emitting phosphor SrZn2(PO4)2:Eu2+ is synthesized by a high temperature solid state method, and the luminescent properties are investigated. At the 330 nm radiation excitation, SrZn2(PO4)2:Eu2+ presents an emission band at 416 nm, which is assigned to the 4f65d1→4f7 transition of Eu2+ion. The concentration quenching effect of Eu2+in SrZn2(PO4)2has been validated and proved to be a resonant type via a dipole-dipole interaction. The critical distance (Rc) of Eu2+in SrZn2(PO4)2is calculated to be 3.244 nm. The Commission International de I’Eclairage (CIE) chromaticity coordinates of SrZn2(PO4)2:Eu2+ locate at the blue region, such as (0.150, 0.072). The results indicate that the SrZn2(PO4)2:Eu2+ phosphor may have potential applications in white light emitting diodes (LEDs).
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LU Wei, LIU Yu-fei, WANG Ying, WANG Zhi-jun, PANG Li-bin. Luminescent properties of blue emitting phosphor SrZn2(PO4)2:Eu2+for white LEDs[J]. Optoelectronics Letters, 2015, 11(6): 426
Received: Aug. 25, 2015
Accepted: --
Published Online: Oct. 12, 2017
The Author Email: Zhi-jun WANG (wangzj1998@sohu.com)