荧光粉涂层对大功率PC-LED光提取效率的影响  

Effect of Phosphor Coating Layer on the Extraction Efficiency of the High-Power PC-LED

作　　者：张锦华[1] 王加贤[1] 朱大庆[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2012年第6期630-634,共5页Journal of Huaqiao University(Natural Science)

基　　金：福建省自然科学基金资助项目(2009J01291);福建省青年科技人才创新项目(2001J030);华侨大学高层次人才科研启动项目(09BS103)

摘　　要：运用基于拟蒙特卡洛的光线追迹方法,模拟计算采用不同曲率透镜及荧光粉层置于不同位置时大功率发光二极管(LED)器件的光通量和光辐射功率.仿真结果表明:对于反光杯顶部采用透镜封装的LED的光通量输出和荧光粉转换效率、透镜曲率、荧光粉层位置、荧光粉粒径大小等因素有关;平面荧光粉涂层处于反光杯中不同位置时,光通量之差大于50%,而光辐射功率也有明显的差别;当透镜顶部与反光杯开口的距离为反光杯开口半径的一半时,荧光粉涂层位于反光杯中间偏下约0.2mm位置,可得到较大的光通量和荧光粉转换效率.The paper introduced quasi Monte Carlo ray tracing method to get the luminous flux and radiation power of the high-power light-emitting diode（LED） using different curvature lens and phosphor layer in different position of the cup.The simulation result shows that,for the packaging devices using lens on top of the reflector cup,the curvature of the lens,phosphor layer′s position,and particle size all plays an important role in luminous flux extracting and phosphor conversion efficiency.When flat phosphor layer in different position of the reflector cup,the difference of luminous flux can get to over 50%,and the radiation power also has an obvious difference.When the distance between the top of the lens and reflector cup is half of the radius of the cup opening,it can obtain a better luminous flux output and phosphor conversion efficiency with the position of the phosphor layer being around 0.2 mm below the middle of the cup.

关 键 词：荧光粉转换 发光二极管 荧光粉涂层 光通量 光辐射功率 拟蒙特卡罗方法 光线追迹 

分 类 号：TN312.805.94[电子电信—物理电子学]