远程荧光粉薄膜浓度和厚度对白光LED性能的影响  

The Influence of Remote Phosphor Film Concentration and Thickness on the Performance of White LED

作　　者：李燕 郑怀文[1,2] 于飞[1,2] 杨华 李璟[1,2,3] 伊晓燕[1,2,3] 王军喜[1,2,3] 李晋闽[1,2,3] LI Yan;ZHENG Huaiwen;YU Fei;YANG Hua;LI Jing;YI Xiaoyan;WANG Junxi;LI Jinmin(Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;Research and Development Center for Solid State Lighting, Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院半导体研究所,北京100083 [2]中国科学院半导体照明研发中心,北京100083 [3]中国科学院大学,北京100049

出　　处：《照明工程学报》2021年第2期30-35,57,共7页China Illuminating Engineering Journal

基　　金：国家重点研发计划(批准号:2017YFB0403200、2017YFB0403201)。

摘　　要：本文研究了不同浓度(10~80 wt%)和不同厚度(0.1~3.1 mm)的远程荧光粉薄膜对白光LED光学性能的影响,为了解不同功率密度激发下荧光粉层的特性,利用大功率LD照射的远程荧光粉层研究了其随功率的温度变化。结果表明,远程荧光粉薄膜的工作温度随其浓度和厚度的增加而增加,并且存在一个适用的最大浓度和厚度。40 wt%(0.2 mm厚度)和0.7 mm(20 wt%)的荧光粉薄膜可实现最优的光学性能,而薄膜的工作温度及温度分布由荧光粉产热量、散热结构及热导率共同决定,这对于未来进一步改善白光LED的光热性能和均匀性具有指导意义。In this paper,the effects of remote phosphor films with different concentrations(10~80 wt%)and thicknesses(0.1~3.1 mm)on the optical properties of white LEDs were studied.In order to understand the characteristics of the phosphor layer under the excitation of different power densities,the temperature change with power was studied using the remote phosphor layer irradiated by high-power LD.In this work,the results show that the operating temperature of the remote phosphor layer film increases with its concentration and thickness,and there exists an applicable concentration and thickness.40 wt%(0.2 mm thickness)and 0.7 mm(20 wt%)phosphor films achieve the optimal optical performance,while the operating temperature and temperature distribution of the film are determined by the phosphor heat production,heat dissipation structure and thermal conductivity,which is a guideline for further improving the optical and thermal performance and uniformity of white LED lighting in the future.

关 键 词：远程荧光粉 发光饱和 荧光粉层温度 白光照明 

分 类 号：TM923[电气工程—电力电子与电力传动]