A new structure of multi-layer phosphor package of white LED with high efficiency  

作　　者：李柏承 张大伟 黄元申 倪争技 庄松林 

机构地区：[1]Shanghai Key Laboratory of Modern Optics System,University of Shanghai for Science and Technology

出　　处：《Chinese Optics Letters》2010年第2期221-223,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.60908021);the Scientific Research Plan Projects of Shanghai Committee of Science and Technology (Nos.08DZ2272800,08ZR1415400,and 09QA1404200).

摘　　要：The applications of white light-emitting diodes （LEDs） have become more and more wide recently, while the low light-extraction efficiency of white LED limits its development. In this letter, a new structure of multi- layer phosphor package of white LED is proposed to improve the light-extraction efficiency. It is illustrated that the thickness of phosphor layer plays an important role in improving the light-extraction efficiency of LED. The light-extraction efficiency of LED is improved by double-layer or multi-layer phosphor package structures,The applications of white light-emitting diodes （LEDs） have become more and more wide recently, while the low light-extraction efficiency of white LED limits its development. In this letter, a new structure of multi- layer phosphor package of white LED is proposed to improve the light-extraction efficiency. It is illustrated that the thickness of phosphor layer plays an important role in improving the light-extraction efficiency of LED. The light-extraction efficiency of LED is improved by double-layer or multi-layer phosphor package structures,

关 键 词：Light emitting diodes LUMINESCENCE PHOSPHORS 

分 类 号：TN104.3[电子电信—物理电子学]