Luminescence and energy transfer properties of single-component Mg0.5Ti2(PO4)3:Dy3+, Eu3+ for warm white UV LEDs

作者：Wang, Jiyou; Feng, Yang^*; Li, Rongdan; Liu, Hongmei

来源：Journal of Alloys and Compounds, 2017, 702: 120-125.

DOI：10.1016/j.jallcom.2017.01.247

• White LED
• Energy transfer
• Photoluminescence
• Mg0.5Ti2(PO4)(3)

Mg0.5Ti2(PO4)(3):Dy3+/Eu3+ phosphors were prepared via solid-state reaction method under normal ambient air. The phosphors were characterized by X-ray, photoluminescence excitation and emission spectra. The XRD patterns showed that Dy3+ and Eu3+ could be effectively doped into the Mg0.5Ti2(PO4)(3) host. The concentration quenching mechanism of Dy3+ in the Mg0.5Ti2(PO4)(3) host was proven to be dipole-dipole interaction. The emission intensity and the decay lifetime of Dy3+ decreased with the increase of Eu3+ concentration, which proved the existence of the energy transfer from Dy3+ to Eu3+ in the Mg0.5Ti2(PO4)(3) host. It was found that the energy was transferred from F-4(9/2) level of Dy3+ to the D-5(0) level of Eu3+ by dipole-dipole interaction. Besides, the correlated color temperature is improved with the introduction of Eu3+ ions. The experiment presents that Mg0.5-x-yTi2(PO4)(3):xDy(3+), yEu(3+) phosphors are promising materials for warm white UV LEDs.

• 出版日期2017-4-25
• 单位北京工业大学