用于白光发光二极管的发蓝绿色光的 Ba2Si3O8:Eu2+ 陶瓷荧光粉。

Bluish-green color emitting Ba2Si3O8:Eu2+ ceramic phosphors for white light-emitting diodes.

机构信息

MOE Key Lab of Specially Functional Materials and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2009 Oct 15;74(3):758-60. doi: 10.1016/j.saa.2009.08.011. Epub 2009 Aug 12.

DOI:10.1016/j.saa.2009.08.011

PMID:19720559

Abstract

This paper reports on the structural and optical properties of Eu(2+) activated Ba(2)Si(3)O(8) ceramic phosphors synthesized by a sol-gel method. The ceramic phosphors have been characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) and fluorescence measurements. The structural characterization results suggest that the as-prepared phosphors are of single phase monoclinic Ba(2)Si(3)O(8) with rod-like morphology. A broad excitation band ranging from 300 to 410 nm matches well with the ultraviolet (UV) radiation of light-emitting diodes (LEDs). Upon 380 nm UV light excitation, these phosphors emit bluish-green emission centered at 500 nm with color coordination (x=0.25, y=0.40). All the obtained results indicate that the Ba(2)Si(3)O(8):Eu(2+) ceramic phosphors are promising bluish-green candidates for the phosphor-converted white LEDs.

摘要

本文报道了通过溶胶-凝胶法合成的 Eu(2+)激活 Ba(2)Si(3)O(8)陶瓷荧光粉的结构和光学性质。采用 X 射线衍射（XRD）、场发射扫描电子显微镜（FESEM）和荧光测量对陶瓷荧光粉进行了表征。结构表征结果表明，所制备的荧光粉为单相单斜 Ba(2)Si(3)O(8)，具有棒状形态。从 300 到 410nm 的宽激发带与发光二极管（LED）的紫外（UV）辐射相匹配。在 380nmUV 光激发下，这些荧光粉发出以 500nm 为中心的蓝绿色发射，其色坐标为（x=0.25，y=0.40）。所有得到的结果表明，Ba(2)Si(3)O(8):Eu(2+)陶瓷荧光粉是用于荧光转换白光 LED 的有前途的蓝绿色候选材料。