基于荧光膜的大功率白光LED的发光性能*

doi:10.11901/1005.3093.2015.029

材料研究学报

2016, Vol. 30

Issue (5): 388-392 DOI: 10.11901/1005.3093.2015.029

本期目录 | 过刊浏览

基于荧光膜的大功率白光LED的发光性能*

陈锋^1,², 张梅¹(

), 何鑫¹, 罗坚义¹, 曾庆光¹, 卿宁²

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

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

CHEN Feng^1,², ZHANG Mei^1,^**(

), HE Xin¹, LUO Jianyi¹, ZENG Qingguang¹, QING Ning²

1. School of Applied Physics and Materials, Wuyi University, Jiangmen, 529020, China
2. School of Chemical and Environment engineering, Wuyi University, Jiangmen, 529020, China

引用本文:

陈锋, 张梅, 何鑫, 罗坚义, 曾庆光, 卿宁. 基于荧光膜的大功率白光LED的发光性能*[J]. 材料研究学报, 2016, 30(5): 388-392.
Feng CHEN, Mei ZHANG, Xin HE, Jianyi LUO, Qingguang ZENG, Ning QING. Optical Properties of High-power White LED Based on Fluorescent Films[J]. Chinese Journal of Materials Research, 2016, 30(5): 388-392.

全文: PDF(2176 KB) HTML

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。Y₃Al₅O₁₂: Ce³⁺ (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Ce³⁺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。

关键词 ：无机非金属材料, 白光发光二极管, 模组封装, 荧光膜

Abstract：

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 Y₃Al₅O₁₂:Ce³⁺ (YAG) phosphors are around 337 nm and 450 nm, respectively, corresponding to the f-d transition of Ce³⁺ 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 lm/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 T_c of 4460K, and the color rendering index of 91.7 was also obtained.

Key words： inorganic non-metallic materials white light emitting diodes packaging modules fluorescent films

收稿日期: 2015-01-25

ZTFLH:

TB321

基金资助:* 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)和五邑大学自然科学青年科研基金2013zk16资助项目

作者简介: 本文联系人: 张梅

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https://www.cjmr.org/CN/10.11901/1005.3093.2015.029 或 https://www.cjmr.org/CN/Y2016/V30/I5/388

图1 荧光膜的合成工艺、实物和微观结构影像图

图2 不同厚度荧光膜的紫外-可见吸收光谱图

图3 基于蓝光LED模组和不同厚度荧光膜封装的LED器件的电致发射光谱(IF = 300 mA)

表1 基于蓝光LED模组和不同厚度荧光膜封装的LED器件的光色参数(IF = 300 mA)

图4 用蓝光芯片和Sr3SiO5:Eu2+荧光膜封装的(a)电致发射光谱图; (b)1931 CIE色坐标图(IF = 300 mA)

图5 封装的高显色指数LED器件的电致发射光谱图(IF = 300 mA)

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