Archive > Volume 11 Issue 6 > 2015,11(6):426-429. DOI:10.1007/s11801-015-5162-3 CSTR:[cstr] Prev Next
Luminescent properties of blue emitting phosphor SrZn2(PO4)2:Eu2+ for white LEDs
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Abstract:
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)2 has been validated and proved to be a resonant type via a dipole-dipole interaction. The critical distance (Rc) of Eu2+ in SrZn2(PO4)2 is 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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This work has been supported by the National Natural Science Foundation of China (No.50902042), the Natural Science Foundation of Hebei
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