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Luminescent properties of blue emitting phosphor SrZn2(PO4)2:Eu2+ for white LEDs
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1. Tangshan Vocational & Technical College, Tangshan 063000, China;;2. Library, Hebei University, Baoding 071002, China;;3. College of Physics Science & Technology, Hebei University, Baoding 071002, China;;4. Department of Foreign Language Teaching and Research, Hebei University, Baoding 071002, China

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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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    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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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):426-429

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  • Received:August 25,2015
  • Online: January 21,2016
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