1. Luminescent properties of white-light-emitting phosphor LaMgAl11O19:Dy3+.
- Author
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Min, Xin, Fang, Minghao, Huang, Zhaohui, Liu, Yangai, Tang, Chao, and Wu, Xiaowen
- Subjects
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OPTICAL polymers , *PHOSPHORS , *SOLID state chemistry , *THERMAL stability , *QUENCHING (Chemistry) , *LIGHT emitting diodes - Abstract
Abstract: The LaMgAl11O19:Dy3+ phosphors were prepared by the high-temperature solid-state reaction method. The phase structure, luminescence properties, and the thermal stability of the phosphors were investigated. Under the excitation of 349nm, the LaMgAl11O19:Dy3+ phosphors exhibited three emission peaks at 475nm, 570nm, and 664nm, which respectively corresponded to the 4F9/2→6H15/2, 4F9/2→6H15/2, and 4F9/2→6H11/2 transitions. It was proved that dipole–dipole interaction resulted in the concentration quenching with a quenching concentration of 0.1mol. The emission intensity at 150°C was stronger than that at 25°C, indicating the good thermal stability of LaMgAl11O19:Dy3+ phosphors. The CIE coordinates of LaMgAl11O19:Dy3+ phosphors are very close to the white light coordinates (x=0.3333 and y=0.3333). Therefore, LaMgAl11O19:Dy3+ phosphor is a promising single-phase phosphor for white light emitting diodes. [Copyright &y& Elsevier]
- Published
- 2014
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