DING Hong-yan, SUN Jiang-ting, LIU Wei, MENG Qing-yu, LV Shu-chen. Effect of Sm<sup>3+</sup> Doping on Structural and Luminescent Properties of CaMoO<sub>4</sub> ∶ Eu<sup>3+</sup> Red Phosphors[J]. Chinese Journal of Luminescence, 2011,32(5): 456-461
DING Hong-yan, SUN Jiang-ting, LIU Wei, MENG Qing-yu, LV Shu-chen. Effect of Sm<sup>3+</sup> Doping on Structural and Luminescent Properties of CaMoO<sub>4</sub> ∶ Eu<sup>3+</sup> Red Phosphors[J]. Chinese Journal of Luminescence, 2011,32(5): 456-461 DOI: 10.3788/fgxb20113205.0456.
Effect of Sm3+ Doping on Structural and Luminescent Properties of CaMoO4 ∶ Eu3+ Red Phosphors
Rare earth ion doped phosphors have attracted great interest during the past several decades due to their unique physical and chemical properties. Among these rare earth ions
the Eu
3+
ion can emit red fluorescence centered at around 613 nm
corresponding to the
5
D
0
7
F
2
transition. Thus many Eu
3+
-doped materials can be used as red phosphors for white LEDs. In this paper
the Eu
3+
and Sm
3+
co-doped CaMoO
4
red phosphors were synthesized using a coprecipitation method. The effect of Sm
3+
doping on structural and luminescent properties of CaMoO
4
∶ Eu
3+
red phosphors were studied. The results indicate that the particle size of the samples decrease with Sm
3+
doping concentration. The excitation intensity at around 405 nm and emission intensity at around 613 nm of Eu
3+
increased after the introduction of Sm
3+
ions. When the mole fraction of Sm
3+
is 5%
the emission intensity of red light is the strongest. In addition
the chromaticity coordinates for CaMoO
4
∶ 0.1Eu
3+
and CaMoO
4
∶ 0.1Eu
3+
0.05Sm
3+
phosphors are (0.661
0.329) and (0.667
0.328)
respectively. The chromaticity coordinates of CaMoO
4
∶ 0.1Eu
3+
0.05Sm
3+
phosphors is closer to the Commission International del Eclairage (CIE) chromaticity coordinates(0.67
0.33). In conclusion
the Eu
3+
and Sm
3+
co-doped CaMoO
4
is a high performance red phosphor and has a potential application in white light emitting diodes.
关键词
Keywords
references
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