采用由蓝色发光二极管激发的发红光的Eu(2+)激活的CaZnOS荧光粉的高显色性白色发光二极管照明器。

High color rendering white light-emitting-diode illuminator using the red-emitting Eu(2+)-activated CaZnOS phosphors excited by blue LED.

作者信息

Kuo Te-Wen, Liu Wei-Ren, Chen Teng-Ming

机构信息

Phosphors Research Laboratory and Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan, ROC. .

出版信息

Opt Express. 2010 Apr 12;18(8):8187-92. doi: 10.1364/OE.18.008187.

DOI:10.1364/OE.18.008187

PMID:20588664

Abstract

A red phosphor CaZnOS:Eu(2+) was synthesized by solid state reaction and has been evaluated as a candidate for white LEDs. For this material, the XRD, PL, PL excitation (PLE) and diffuse reflection spectra have also been investigated. CaZnOS:Eu(2+) reveals a broad absorption band and good color purity. By utilizing a mixture of red-emitting CaZnOS:Eu(2+), green-emitting (Ba,Sr)(2)SiO(4):Eu(2+) and yellow-emitting Y(3)Al(5)O(12):Ce(3+) as light converters, an intense white InGaN-based blue-LED (~460 nm) was fabricated to exhibit a high color-rendering index Ra of 85 at a correlated color temperature of 4870 K. Based on the results, we are currently evaluating the potential application of CaZnOS:Eu(2+) as a red-emitting blue-chip convertible phosphor.

摘要

通过固态反应合成了红色荧光粉CaZnOS:Eu(2+)，并对其作为白光发光二极管（LED）的候选材料进行了评估。对于这种材料，还研究了X射线衍射（XRD）、光致发光（PL）、光致发光激发（PLE）和漫反射光谱。CaZnOS:Eu(2+)显示出宽吸收带和良好的色纯度。通过使用发红光的CaZnOS:Eu(2+)、发绿光的(Ba,Sr)(2)SiO(4):Eu(2+)和发黄光的Y(3)Al(5)O(12):Ce(3+)的混合物作为光转换器，制备了一种高强度的基于InGaN的蓝色发光二极管（~460 nm），在相关色温为4870 K时表现出高达85的高显色指数Ra。基于这些结果，我们目前正在评估CaZnOS:Eu(2+)作为发红光的蓝光芯片可转换荧光粉的潜在应用。