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采用溶胶-凝胶法制备了可用于白光LED的新型Ca3Si3O9:Dy3+荧光粉, 通过对样品的X 射线衍射谱及光致发光光谱的测试和表征, 研究了Ca3Si3O9:Dy3+的物相结构和发光性能. 结果显示, Ca3Si3O9:Dy3+的发射光谱是由位于483 nm和577 nm处的主峰构成的双峰谱线, 激发光谱为多峰宽谱, 谱峰位于290–480 nm范围内. Dy3+掺杂浓度对Ca3Si3O9:Dy3+发光性能有明显的影响, 随着Dy3+浓度的增大, Ca3Si3O9:Dy3+的发光强度和黄、蓝光发射强度比 (Y/B) 均呈现先增大后减小的规律, 最大发光强度值对应的Dy3+浓度为1 mol%. 电荷补偿剂Li+能提高Ca3Si3O9:Dy3+的发光强度, 特别当Li+浓度为2–4 mol%时, 荧光粉的蓝光发射强度显著增大.
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关键词:
- 白光LED /
- 溶胶-凝胶法 /
- Ca3Si3O9:Dy3+ /
- 发光特性
A novel Ca3Si3O9:Dy3+ phosphor for white LED was prepared by sol-gel method. The structure and luminescent properties of Ca3Si3O9:Dy3+ phosphors with different concentration of Dy3+ and charge compensator Li+ were characterized by X-ray diffraction (XRD) and photoluminescence (PL) spectra. Results show that the emission spectrum consists of two main band peaks locatied at 483 nm and 577 nm, while the peaks of excitation spectrum are located in the rang of 290–480 nm. Both of luminescent intensity and the ratio of yellow to blue emission (Y/B) increase first and then decrease with increasing Dy3+ concentration; and the luminescent intensity reaches a maximum when Dy3+ concentration is of 1 mol%. The luminescent intensity of Ca3Si3O9:Dy3+can be enhanced by Li+, and the blue emission increases greatly when Li+ concentration is within the range of 2 to 4 mol%.-
Keywords:
- white LED /
- sol-gel method /
- Ca3Si3O9:Dy3+ /
- luminescent properties
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[13] Liu H L, Hao Y Y, Wang H, Zhao J F, Huang P, Xu B S 2011 J. Lumin. 131 2422
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[1] Li P L, Yang Z P, Wang Z J, Guo Q L 2008 Chin. Phys. B 17 1135
[2] Nishiura S, Tanabe S, Fujioka K, Fujimoto Y 2011 Opt. Mater. 33 688
[3] Zhang X H, Lu Z M, Meng F B, Lu F, Hu L, Xu X W, Tang C C 2012 Mater. Lett. 66 16
[4] Lei F, Yan B 2008 J. Solid State Chem. 181 855
[5] Luo Y Y, Jo D S, Senthil K, Tezuka S, Kakihana M, Toda K, Masaki T, Yoon D H 2012 J. Solid State Chem. 189 68
[6] Zhang Z H, Feng J G, Huang Z L 2010 Particuology 8 473
[7] Zhang X H, Lu Z M, Meng F B, Hu L, Xu X W, Lin J, Tang C C 2012 Mater. Lett. 79 292
[8] Wang Z J, Li P L, Wang G, Yang Z P, Guo Q L 2008 Acta Phys. Sin. 57 4575 (in Chinese) [王志军, 李盼来, 王刚, 杨志平, 郭庆林 2008 57 4575]
[9] Li P L, Wang Y, Guo Q L 2011 Chin. Sci. Bull. 56 488 (in Chinese) [李盼来, 王颖, 郭庆林 2011 科学通报 56 488]
[10] Yu Y, Liu Z J, Chen Q Q, Dai N L, Li J Y, Yang L Y 2013 Acta Phys. Sin. 62 017804 (in Chinese) [余阳, 刘自军, 陈乔乔, 戴能利, 李进延, 杨旅云 2013 62 017804]
[11] Yang H, Zhang L, Han P D, Zhang Q T 2012 J. Nanjing Univ. Tec. 34 16 (in Chinese) [杨浩, 张乐, 韩鹏德, 张其土 2012 南京工业大学学报 34 16]
[12] Yang F, Liang Y J, Liu M Y, Li X J, Wang N, Xia Z G 2012 Ceram. Int. 38 6197
[13] Liu H L, Hao Y Y, Wang H, Zhao J F, Huang P, Xu B S 2011 J. Lumin. 131 2422
[14] Zhai Y Q, You Z J, Wang X, Xing R S, L J P 2011 J. Chin. Ceram. Soc. 39 1887 (in Chinese) [翟永清, 游志江, 王欣, 邢瑞思, 吕佳佩 2011 硅酸盐学报 39 1887]
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