光学薄膜对LED出光效率影响的研究进展  

Progress in Effects of Optical Thin-film on Light Extraction Efficiency of LED

作　　者：王乐[1,2] 吴弼卿[1] 李晓艳[1,2] 梁培[1] 顾培夫[2] 

机构地区：[1]中国计量学院光学与电子科技学院,浙江杭州310018 [2]浙江大学光电系,浙江杭州310027

出　　处：《材料科学与工程学报》2011年第4期647-654,604,共9页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(61077035);浙江省科技厅优先主题重点工业项目(2009C11032);浙江省自然科学基金资助项目(Y1100575)

摘　　要：LED作为新一代光源,具有环保节能等突出优点。然而其出光效率一直是制约LED光源普及应用于照明领域的重要因素之一,LED的出光效率受到封装材料、封装结构、荧光粉激发效率、透明电极透光率和衬底反射率等因素的影响。本文对近年来应用于LED的光学薄膜,主要包括透明导电薄膜和全方位反射薄膜的研究进行了综述,分析了LED结构中采用光学薄膜,可以有效减少透明电极层透光率低和衬底反射率低的问题,提高LED出光效率。同时对LED光学薄膜和纳米技术的综合应用及发展趋势进行了展望。LED has many advantages such as energy saving and environmental protection as a new generation of light.However,low light-extraction efficiency limits its popular applications in the illuminating field.Light-extraction efficiency is influenced by many factors including packaging materials,packaging structure,luminous efficiency of the phosphor,the transmittance of transparent conductor film and the reflectance of substrate.Development of optical thin-films in LED area was reviewed,moreover,the developing tendency of combinating optical thin-films with nano technology in the LEDs were prospected.Optical thin-films can be used in the LED structure to improve the light-extraction efficiency,such as using high anti-reflective films as the transparent conductor diffusion layer,using high reflective films as the reflector under the substrate,which can effectively reduce the influence due to the low light transmittance of transparent conductor and low reflectance of substrate.

关 键 词：LED 出光效率 透明导电薄膜 全方位反射薄膜 

分 类 号：TQ174.4[化学工程—陶瓷工业] TN312[化学工程—硅酸盐工业]