Preparation and Luminescent Properties of Light Scattering Fluorescent Resin
XIAO Yao1, FAN Guang-han1, 2, PI Hui1, XU Yi-qin2, CHEN Zhi-wu1, HE Long-fei2, YU Xiao-peng1, ZHANG Li1, ZHENG Shu-wen1*, ZHANG Tao1*
1. Laboratory of Nanophotonic Functional Materials and Devices, Institute of Opto-electronic Materials and Technology, South China Normal University, Guangzhou 510631, China 2. Guangdong General Research Institute for Industrial Technology, Guangzhou 510650, China
Abstract:With the methods of compound-melting and high-temperature molding, PC/YAG∶Ce fluorescent resin pieces were prepared. The transmittance of the prepared PC/YAG∶Ce fluorescent resin in 500~800 nm reaches approximately 65% (0.71 mm thick, double sides polished). The fluorescent resin was characterized by XRD, SEM and PL. The X-ray diffraction (XRD) patterns demonstrated that the fluorescent resin was pure Y3Al5O12 phase. The scanning electron microscopy (SEM) images showed that YAG phosphor was distributed evenly in the fluorescent resin. The excitation spectra had a weak peak at 342 nm and a strong band at 448 nm. The broad emission peaks at about 532 nm can be attributed to 5d→4f transition of Ce3+ ions. Decay curves for the fluorescence of PC/YAG∶Ce fluorescent resin show that the lifetime of the fluorescent resin was 61.5 ns. The luminous efficacy of the white LED packaged by the fluorescent resin and blue LED chip was 81.12 lm·W-1 at 100 mA. All results above of PC/YAG∶Ce fluorescent resin indicate a promising fluorescent material for white LEDs.
Key words:Fluorescent resin;YAG∶Ce;Polycarbonate;White LED
[1] Nakamura S, Mukai T. Senoh. Appl. Phys. Lett., 1994, 64: 1687. [2] LIU Xing-ren(刘行仁). Chinese Journal of Luminescence(发光学报),2007, 28(3): 291. [3] HE Long-fei, FAN Guang-han, LEI Mu-yun(贺龙飞,范广涵,雷牧云). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2013, 33(5): 1175. [4] Kim Jong Kyu, Luo Hong,Eric Fred SCHUBERT. Japanese Journal of Applied Physics, 2005,44(21): 649. [5] LIAO Jian-guo, LI Yu-bao(廖建国,李玉宝). Acta Materiae Compositae Sinica(复合材料学报),2008, 25(3): 63. [6] DU Feng, SONG Jian-bin(杜 峰,宋剑斌). Journal of Nanjing University of Technology(南京工业大学学报),2010, 32(4):23. [7] OUYANG Xing, CHEN Da-zhu, TANG Jiao-ning(欧阳星,陈大柱,汤皎宁). China Synthetic Resin and Plastics(合成树脂及塑料),2012, 29(4):21. [8] JIANG Ji-feng, ZHOU Shao-hua(蒋继峰, 周少华). Rare Metal Materials and Engineering(稀有金属材料与工程),2008, 37(2): 426. [9] YANG Jun, YAN Wei-ping, LI Ming-wei(杨 隽,闫卫平, 李明伟). Journal of the Chinese Rare Earth Society(中国稀土学报),2005,23: 27. [10] SONG Guo-hua, MIAO Jian-wen, XU Shu-wu(宋国华, 缪建文, 徐淑武). Journal of Optoelectronics·Laser(光电子·激光),2010, 21(12): 1785. [11] YANG Xin-bo, SHI Yun, LI Hong-jun(杨新波, 石 云, 李红军). Acta Physica Sinica(物理学报),2009, 58(11): 8050. [12] SHI Yun, PAN Yu-bai, FENG Xi-qi(石 云, 潘裕柏, 冯锡淇). Chinese Journal of Inorganic Materials(无机材料学报),2010, 25(2): 125. [13] Pang R, Li C Y, Shi L L. J. Phys. Chem. Solids, 2009, 70(2): 303. [14] Furman J D, Gundiah G, Page K. Chem. Phys. Lett., 2008, 465(1/3): 67.