第二相引入荧光转换材料实现激光驱动高均匀性白光光源  

Achieving High Light Uniformity Laser-driven White Lighting Source by Introducing Secondary Phases in Phosphor Converters

作　　者：邓陶丽 陈河莘 黑玲丽 李淑星 解荣军[1] DENG Taoli;CHEN Hexin;HEI Lingli;LI Shuxing;XIE Rongjun(State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials,College of Materials,Xiamen University,Xiamen 361005,China;College of Chemistry and Chemical Engineering,Anshun University,Anshun 561000,China)

机构地区：[1]厦门大学材料学院,固体表面物理化学国家重点实验室,福建省表界面工程与高性能材料重点实验室,厦门361005 [2]安顺学院化学化工学院,安顺561000

出　　处：《无机材料学报》2022年第8期891-896,I0003,I0004,共8页Journal of Inorganic Materials

基　　金：National Natural Science Foundation of China(51832005,U2005213);Fujian Provincial Science and Technology Project(2020I0002)。

摘　　要：激光驱动的白光光源在超高亮度、高准直性和远距离照明领域具有很大的应用潜力,但由于蓝光激光和转换荧光在光源性质上的失配,造成激光驱动白光光源的光均匀性差。本研究在Y_(3)Al_(5)O_(12):Ce^(3+)(YAG)荧光玻璃薄膜(PiG)中引入不同种类的第二相,如TiO_(2)、BN、Al_(2)O_(3)或SiO_(2)作为散射介质来调节光路,并对第二相的掺杂浓度分别进行了优化。研究分析了掺入不同种类第二相的YAG PiG获得激光驱动白光光源的实物照明图像和散斑图像、亮度和色温的角分布情况及其光学性质。结果发现,引入第二相大大改善了白光光源的亮度和色温均匀性,其中具有最大相对反射率的YAG-TiO_(2)PiG,获得综合性能最佳的高均匀性白光光源,在蓝光激光激发下,其发光饱和阈值和光通量值达到最高,分别为20.12 W/mm^(2)和1056.6 lm。本研究为荧光转换材料中散射介质的选择提供了指导,为实现高均匀性、高亮度的激光驱动白光光源奠定了基础。Laser-driven white lighting sources have great potential for applications with super-high brightness,high directionality and long distance illumination,but are usually limited by their poor uniformity due to mismatch between blue laser light and phosphor converted light.In this work,a secondary phase of TiO_(2),BN,Al_(2)O_(3)or SiO_(2)was introduced as scattering media in the Y_(3)Al_(5)O_(12):Ce^(3+)(YAG)phosphor-in-glass(PiG)film to regulate the light path,where the optimum concentration of the secondary phase was determined,respectively.The images of illumination and speckle,angular distributions of luminance and color temperature,as well as optical properties of the white light produced by the different secondary phases based-YAG PiG films were investigated.The light uniformity in luminance and color temperature is greatly improved by introducing secondary phases,among which TiO_(2)is demonstrated as the best one as it has the largest relative reflective index.In addition,the YAG-TiO_(2)PiG film has the largest luminance saturation threshold of 20.12 W/mm^(2)and the highest luminous flux of 1056.6 lm under blue laser irradiation.This work paves an avenue to choose appropriate scattering media in PiG films for realizing more uniform and brighter laser-driven white lighting source.

关 键 词：光均匀性 激光驱动白光光源 光散射 荧光玻璃薄膜 光学性质 

分 类 号：O482[理学—固体物理]