基于积分球的蓝光LED荧光粉测试系统

肖华; 吕毅军; 高玉琳; 朱丽虹; 陈国龙; 陈忠

光电技术应用, 2013, 28 (4): 21, 网络出版: 2013-07-29

基于积分球的蓝光LED荧光粉测试系统

Testing System of Phosphor Excited by Blue LED Based on Integral Sphere

论文大纲

肖华吕毅军高玉琳朱丽虹陈国龙陈忠

作者单位

厦门大学电子科学系, 福建省半导体照明工程技术研究中心, 福建厦门 361005

白光LED 荧光粉发光效能量子效率光转换效率 white light LED phosphor luminous efficiency quantum efficiency light conversion efficiency

摘要

为尽可能反映荧光粉在实际工作条件下的发光性质, 准确测量荧光粉的发光性能, 提出了一种基于积分球的荧光粉发光性能测试系统。该系统采用蓝光 LED作为激发光源, 配置有 TEC控温系统对光源有效实施控温, 可提供持续稳定的激发荧光粉发光。采用出光筒控制光源方向和积分球收集光线, 能有效防止能量损失, 提高测试的精确性。通过实验得到了不同强度蓝光激发下的荧光粉光谱功率分布以及发光效能、量子效率、光转换效率等参数的变化规律。随着驱动电流的增大, 由于蓝光芯片内量子限制斯塔克效应, 从而导致蓝光峰值波长出现小幅度的蓝移。三种效率在小电流下基本呈线性下降趋势, 且在大电流下趋于平缓。实验结果表明, 该系统及方法可以有效地评价实际 LED芯片工作状态下的荧光粉发光性能。

Abstract

Abstract：A testing system for phosphor luminous characteristics based on integral sphere is proposed so as to show luminous characteristics of phosphor at actual operation circumstances and measure its luminous characteristics accurately. Blue LED is used as an excited source in the system. TEC temperature control system is used to control the temperature of the source effectively. And continuous and stable excited light is provided to excite phosphor illumining. Energy loss is prevented effectively and testing accuracy is enhanced for the direction of source controlled by a light tube and light ray collected by integral sphere. Based on experiments, spectrum power distributions of phosphor excited by blue light with difference light strength and variation rules of parameters such as luminous efficiency, quantum efficiency and light conversion efficiency are got. With the increasing of driving current, a small blue shift appears in blue light peak wavelength for quantum confined Stark effect in blue light chip. Three kinds of efficiency almost show linear decline trend at low current and then approach to constant at high current. Experimental results show that luminous characteristics of phosphor on real LED chip at operation state can be evaluated effectively by the system and method.

参考文献

[1] 金骥, 余桂英, 林敏. 基于非成像光学的LED高收光率的抛物反射器研究[J]. 中国激光, 2010, 37(3):680-684.

[2] Sedat Nizamoglu, Gulis Zengin, Hilmi Volkan Demir. Color-converting combinations of nanocrystal emitters for warm-white light generation with high color rendering index [J]. Appl. Phys. Lett. , 2008, 92(3):031102-1-031102-3.

[3] Naoki Kimura, Ken Sakuma, Syunichiro Hirafune, et al. Extrahigh color rendering white light-emitting diode lamps using oxynitride and nitride phosphors excited by blue light-emitting diode[J]. Appl. Phys. Lett. , 2007, 90(5): 051109-1-051109-3.

[4] 李亮, 金尚忠, 岑松原, 等. 荧光粉浓度和电流强度对白光LED特性的影响[J]. 激光与光电子学进展, 2012, 49: 032301-1-032301-6.

[5] 李盼来, 杨志平, 王志军, 等. 用于白光LED的Sr3SiO5:Eu2+材料制备及发光特性研究[J]. 科学通报, 2007, 52(13):1495-1498.

[6] S Nakamura, G Fasol. The Blue Laser Diode[M]. Berlin: Springer Press, 1996：1-24.

[7] YANG Chih-Chieh, LIN Chih-Min, CHEN Yi-Jung, et al. Highly stable three-band white light from an InGaN-based blue light-emitting diode chip precoated with (oxy)nitride green/red phosphors[J]. Appl. Phys. Lett. , 2007, 90(12):123503-1-123503-3.

[8] Prancikus Vitta, Paulius Pobedinskas, Artuuras Zukauskas. Phosphor thermometry in white light-emitting diodes [J]. IEEE Photonics Technology Letters, 2007, 19(6): 399-401.

[9] 陈国龙, 薛浩, 张纪红, 等. 基于Spectro320e光谱仪的白光LED荧光粉性能测试[J]. 现代显示, 2012, 135:29-33.

[10] 郭伟玲, 崔德胜, 崔碧峰, 等. 荧光粉比例对白光LED特性的影响[J]. 光谱学与光谱分析, 2011, 31(10): 2680-2683.

[11] 何锦华, 梁超, 符义兵. 荧光粉在高显色白光LED中的应用技术研究[J]. 中国照明电器, 2009, 2:11-13, 33.

[12] 付伟, 钱可元, 罗毅, 等. 白光LED荧光粉荧光外量子效率的准确测量[J]. 半导体光电, 2011, 32(5):640-645.

[13] WANG Yi, MOU Tong-sheng, LI Li. Characterization and measurement of white LED phosphors[J]. Opto-electronic Engineering, 2010, 37(9):127-132.

[14] LIU Zong-yuan , LIU Sheng , WANG Kai, et al. Measurement and numerical studies of optical properties of YAG:Ce phosphor for white light-emitting diode packaging[J]. Applied Optics, 2010, 49(2):247-257.

[15] 吴国庆, 郭伟玲, 朱彦旭, 等. 驱动电流对大功率白光LED荧光粉转换效率的影响[J]. 光电子·激光, 2012, 23(10):1869-1875.

肖华, 吕毅军, 高玉琳, 朱丽虹, 陈国龙, 陈忠. 基于积分球的蓝光LED荧光粉测试系统[J]. 光电技术应用, 2013, 28(4): 21. XIAO Hua, LU Yi-jun, GAO Yu-lin, ZHU Li-hong, CHEN Guo-long, CHEN Zhong. Testing System of Phosphor Excited by Blue LED Based on Integral Sphere[J]. Electro-Optic Technology Application, 2013, 28(4): 21.

基于积分球的蓝光LED荧光粉测试系统

关于本站 Cookie 的使用提示

全站搜索

基于积分球的蓝光LED荧光粉测试系统

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索