发光学报, 2012, 33 (4): 371, 网络出版: 2012-04-16   

白光LED用Ce3+/Sm3+共掺玻璃和微晶玻璃的发光特性及能量传递研究

Luminescence and Energy Transfer of Ce3+/Sm3+ Co-doped Glass and Glass Ceramics Containing Zn2SiO4 Nanocrystals for White LEDs
作者单位
1 中国计量学院 光学与电子科技学院, 浙江 杭州310018
2 中国计量学院 材料科学与工程学院, 浙江 杭州310018
摘要
采用高温熔融法制备了一系列Ce3+/Sm3+共掺透明微晶玻璃,并研究了其发光特性。在微晶玻璃中Ce3+呈现出基于4f-5d跃迁的较强的宽带蓝光发射,通过调节Ce3+/Sm3+离子的掺杂浓度,Ce3+/Sm3+离子共掺微晶玻璃发光的色度逐渐发生变化,当CeO2/Sm2O3掺杂的量比为1∶1时,制得的微晶玻璃发光色坐标为(0.315, 0.296)。通过光谱和荧光衰减曲线,研究了Ce3+离子到Sm3+离子的能量传递,在SAZKNGC0.6S0.6微晶玻璃中,Ce3+离子向Sm3+离子传递能量效率约为20%。结果表明,Ce3+/Sm3+共掺微晶玻璃是白光LED的一种潜在基质材料。
Abstract
A series of transparent Ce3+/Sm3+ co-doped glass ceramics were prepared by high temperature melting, and their luminescence properties were studied. In the glass ceramics, Ce3+ ions have shown efficient broadband blue emission due to the 4f-5d transition, and Sm3+ ions have shown bright orange-red luminescence resulting from the 4G5/2→6HJ (J=5/2,7/2,9/2,11/2) transitions. By adjusting the doped concentration of Ce3+ and Sm3+ ions, the chroma of the samples varied gradually. When the mole fraction of CeO2 and Sm2O3 was 1∶1, the white light luminescence glass ceramic with the chromaticity coordinate (0.315, 0.296) was prepared. The energy transfer from Ce3+ to Sm3+ ions were investigated by spectra properties and fluorescence decay curves, energy transfer efficiency is about 20% in the SAZKNGC0.6S0.6 glass ceramics. The results indicate that Ce3+/Sm3+ co-doped glass ceramics containing β-Zn2SiO4 are potential matrix materials for white LEDs.

江青云, 李晨霞, 叶仁广, 陈鸿, 华有杰, 邓德刚, 赵士龙, 徐时清. 白光LED用Ce3+/Sm3+共掺玻璃和微晶玻璃的发光特性及能量传递研究[J]. 发光学报, 2012, 33(4): 371. JIANG Qing-yun, LI Chen-xia, YE Ren-guang, CHEN Hong, HUA You-jie, DENG De-gang, ZHAO Shi-long, XU Shi-qing. Luminescence and Energy Transfer of Ce3+/Sm3+ Co-doped Glass and Glass Ceramics Containing Zn2SiO4 Nanocrystals for White LEDs[J]. Chinese Journal of Luminescence, 2012, 33(4): 371.

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