高效Y2Mo4O15:Eu(3+)荧光粉及陶瓷的发光与发光猝灭

Luminescence and luminescence quenching of highly efficient Y2Mo4O15:Eu(3+) phosphors and ceramics.

作者信息

Janulevicius Matas, Marmokas Paulius, Misevicius Martynas, Grigorjevaite Julija, Mikoliunaite Lina, Sakirzanovas Simas, Katelnikovas Arturas

机构信息

Department of Analytical and Environmental Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania.

Department of Inorganic Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania.

出版信息

Sci Rep. 2016 May 16;6:26098. doi: 10.1038/srep26098.

A good LED phosphor must possess strong enough absorption, high quantum yields, colour purity, and quenching temperatures. Our synthesized Y2Mo4O15:Eu(3+) phosphors possess all of these properties. Excitation of these materials with near-UV or blue radiation yields bright red emission and the colour coordinates are relatively stable upon temperature increase. Furthermore, samples doped with 50% Eu(3+) showed quantum yields up to 85%, what is suitable for commercial application. Temperature dependent emission spectra revealed that heavily Eu(3+) doped phosphors possess stable emission up to 400 K and lose half of the efficiency only at 515 K. In addition, ceramic disks of Y2Mo4O15:75%Eu(3+) phosphor with thickness of 0.71 and 0.98 mm were prepared and it turned out that they efficiently convert radiation of 375 and 400 nm LEDs to the red light, whereas combination with 455 nm LED yields purple colour.

一种优良的LED荧光粉必须具备足够强的吸收能力、高量子产率、色纯度和猝灭温度。我们合成的Y2Mo4O15:Eu(3+)荧光粉具备所有这些特性。用近紫外或蓝光辐射激发这些材料会产生明亮的红色发射，并且随着温度升高，色坐标相对稳定。此外，掺杂50% Eu(3+)的样品显示出高达85%的量子产率，这适用于商业应用。温度相关的发射光谱表明，重掺杂Eu(3+)的荧光粉在高达400 K时具有稳定的发射，仅在515 K时效率损失一半。此外，制备了厚度为0.71和0.98 mm的Y2Mo4O15:75%Eu(3+)荧光粉陶瓷盘，结果表明它们能有效地将375和400 nm LED的辐射转换为红光，而与455 nm LED组合则产生紫色。