Huang Yanlin, Nakai Yosuke, Tsuboi Taiju, Seo Hyo Jin
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China.
Opt Express. 2011 Mar 28;19(7):6303-11. doi: 10.1364/OE.19.006303.
The novel red-emitting phosphors of Eu3+-activated Ca2RF4PO4:Eu3+ (R=Gd, Y) prepared by a solid-state reaction have been evaluated as a candidate for white solid state lighting. The detailed luminescence properties, e.g., the excitation spectra, the luminescence spectra and quantum efficiency under the excitation of near-UV, and decay lifetimes were reported. The phosphors can be efficiently excited by near UV light and exhibit a dominant emission peaked at 611 nm (5D0-7F2) with CIE coordinates of (x=0.661, y=0.333). The thermal stabilities were investigated from the luminescence intensities, color purity and the decay curves by increasing temperature. The luminescence parameters related to white LEDs applications were compared to some red phosphors and discussed in details. The red-emitting Ca2RF4PO4:Eu3+ (R=Gd, Y) may be potentially useful in the fabrication of white LEDs.
通过固态反应制备的新型 Eu3+ 激活的 Ca2RF4PO4:Eu3+（R = Gd，Y）红色发光磷光体已被评估为白色固态照明的候选材料。报道了其详细的发光特性，例如激发光谱、发光光谱以及近紫外激发下的量子效率和衰减寿命。这些磷光体可被近紫外光有效激发，并在 611 nm（5D0 - 7F2）处呈现出主峰发射，其 CIE 坐标为（x = 0.661，y = 0.333）。通过升高温度，从发光强度、色纯度和衰减曲线方面研究了热稳定性。将与白色发光二极管应用相关的发光参数与一些红色磷光体进行了比较并详细讨论。发红光的 Ca2RF4PO4:Eu3+（R = Gd，Y）在白色发光二极管的制造中可能具有潜在用途。
