荧光粉
光致发光
发光
发光二极管
材料科学
分析化学(期刊)
兴奋剂
离子
能量转移
偶极子
猝灭(荧光)
电偶极子跃迁
发射光谱
谱线
光电子学
荧光
化学
光学
分子物理学
物理
磁偶极子
色谱法
有机化学
天文
作者
Jiyou Wang,Feng Yang,Rongdan Li,Hongmei Li
标识
DOI:10.1016/j.jallcom.2017.01.247
摘要
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 4F9/2 level of Dy3+ to the 5D0 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:xDy3+, yEu3+ phosphors are promising materials for warm white UV LEDs.
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