Li Y Q, van Steen J E J, van Kervel J W H, et al. Luminescence properties of red-emitting M2Si5N8 ∶ Eu2+(M=Ca, Sr, Ba) LED conversion phosphors [J]. Journal of Alloys and Compounds, 2006,417:273-279.[2] Sun X Y, Zhang J H, Zhang X, et al. A green-yellow emitting -Sr2SiO4 ∶ Eu2+ phosphor for near ultraviolet chip white-light-emitting diode [J]. J. Rare Earths, 2008,26(3):421-424.[3] Zhu Chaofeng, Liang Xiaoluan,Yang Yunxia, et al. Luminescence properties of Tb doped and Tm/Tb/Sm co-doped glasses for LED applications [J]. J. Lumin., 2010,130(1):74-77.[4] Jung K Y, Kim J H, Kang Y C. Luminescence enhancement of Eu-doped calcium magnesium silicate blue phosphor for UV-LED application[J]. J. Lumin., 2009,129(6):615-619.[5] Niu Nanhui, Wang Huaibing, Liu Jianping, et al. Enhanced luminescence of In GaN/GaN multiple quantum wells by strain reduction [J]. Solid-State Electronics, 2007,51(6):860-864.[6] Fujii T, Gao Y, Sharma R, et al. Increase in the extraction efficiency of GaN-based light-emitting diodes via surface roughening [J]. Appl. Phys. Lett., 2004,85:855(1-3).[7] Huang H W, Kao C C, Chu J T, et al. Improvement of InGaN-GaN light-emitting diode performance with a nano-roughened p-GaN surface[J]. IEEE Photonics Technology Lett., 2005,17(5): 983-985.[8] 严萍,李剑清.照明用LED光学系统的计算机辅助设计[J]. 半导体光电, 2004,25(3):181-200.