Kuo Te-Wen, Liu Wei-Ren, Chen Teng-Ming
Phosphors Research Laboratory and Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan, ROC.
Opt Express. 2010 Feb 1;18(3):1888-97. doi: 10.1364/OE.18.001888.
A series of alkaline earth borophosphate phosphors, (Ba,Sr)(3)BP(3)O(12) doped with Eu(2+) ions, were synthesized by a solid state reaction. Two emission bands at 465 nm and 520 nm were attributed to the f-d transitions of doped Eu(2+) ions occupying in two different cation sites in host lattices and emission color variation was observed by substituting the M(2+) sites, which was rationalized in terms of two competing factors of the crystal field strength and bond covalence. Green and bluish-white pc-LEDs were fabricated by combination of a 370 nm near-UV chip and composition-optimized Ba(3)BP(3)O(12):Eu(2+) and (Ba,Sr)(3)BP(3)O(12):Eu(2+) phosphors, respectively. The series of phosphors may serve as a promising green and bluish-white luminescent materials used in fabrication of near UV-based white pc-LEDs.
通过固态反应合成了一系列掺杂Eu(2+)离子的碱土硼磷酸盐荧光粉(Ba,Sr)(3)BP(3)O(12)。465nm和520nm处的两个发射带归因于占据主体晶格中两个不同阳离子位点的掺杂Eu(2+)离子的f-d跃迁，通过取代M(2+)位点观察到发射颜色变化，这可以根据晶体场强度和键共价性这两个竞争因素来解释。分别通过将370nm近紫外芯片与成分优化的Ba(3)BP(3)O(12):Eu(2+)和(Ba,Sr)(3)BP(3)O(12):Eu(2+)荧光粉组合，制备了绿色和蓝白色的pc-LED。该系列荧光粉有望作为绿色和蓝白色发光材料用于制备基于近紫外的白色pc-LED。
