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。
A series of transparent Ce^3＋/Sm^3＋ co-doped glass ceramics were prepared by high temperature melting, and their luminescence properties were studied. In the glass ceramics, Ce^3 ＋ ions have shown efficient broadband blue emission due to the 4f-5d transition, and Sm^3＋ 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 Ce^3＋ and Sm^3 ＋ ions, the chroma of the samples varied gradually. When the mole fraction of CeO2 and Sm2 03 was 1 ： 1, the white light lumines- cence glass ceramic with the chromaticity coordinate （0.315,0. 296） was prepared. The energy transfer from Ce^3＋ to Sm^3＋ 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 Ce^3＋/Sm^3- co-doped glass ceramics containing β-Zn2SiO4 are potential matrix materials for white LEDs.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2012年第4期371-376,共6页
Chinese Journal of Luminescence
基金
supported by the Project of the National Nature Science Foundation of China(GrantNo.51072190)
Program for the Nature Science Foundation of Zhejiang Province(Grant No.Z4100030 and Y4100571)~~
