基于荧光膜的大功率白光LED的发光性能  

Optical Properties of High-power White LED Based on Fluorescent Films

作　　者：陈锋[1,2] 张梅[1] 何鑫[1] 罗坚义[1] 曾庆光[1] 卿宁[2] 

机构地区：[1]五邑大学应用物理与材料学院,江门529020 [2]五邑大学化学工程与环境学院,江门529020

出　　处：《材料研究学报》2016年第5期388-392,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金青年基金61307026;2014年度江门市第十四批科技计划项目(江财工[2014]145号);五邑大学自然科学青年科研基金2013zk16资助项目~~

摘　　要：使用荧光粉和硅胶制备荧光膜,然后与455 nm蓝光芯片模组组装成高功率的白光LED器件。采用吸收光谱、荧光光谱和电致发射光谱等对荧光膜和器件进行表征,研究了红色荧光粉与黄色荧光粉的比例对器件性能的影响。结果表明:所制备的荧光膜表面平整、荧光粉分散均匀。Y_3Al_5O_(12):Ce^(3+)(YAG)荧光膜的吸收光谱峰分别位于337 nm和450 nm左右,与YAG荧光粉中Ce^(3+)的f-d跃迁吸收对应,且当荧光膜厚度为1.00 mm时制备出的功率为2.8 W左右的LED模组光色参数较好。将不同比例红色荧光粉和黄色荧光粉按上述厚度和条件制备高显色荧光膜和低色温4460 K、高显色指数91.7的白光LED器件。The fluorescent films were produced by phosphors and silicones for LED packaging modules. Then the high-power white LEDs were fabricated based on these films and 455 nm Ga（In）N chip modules. The fluorescent films and the fabricated LEDs are characterized by absorption, fluorescent and electroluminescent spectra in details. It follows that the prepared films are smooth and uniform with high quality; the absorption peaks of the films based Y3Al4O12：Ce^3＋ （YAG） phosphors are around 337 nm and 450 nm, respectively, corresponding to the f-d transition of Ce^3＋ in YAG phosphors; the fluorescent films with thickness of 1.00 mm are suitable for 2.8 W LED modules; the luminous efficiency of the fabricated LEDs can reach 76 Im/W. The influence of the ratio of red phosphors to yellow phosphors on the white LEDs was also examined in order to prepare the white LED with high color rendering index. Then white LEDs with the correlated color temperature To of 4460K, and the color rendering index of 91.7 was also obtained.

关 键 词：无机非金属材料 白光发光二极管 模组封装 荧光膜 

分 类 号：TB321[一般工业技术—材料科学与工程]