本文合成了掺Ce3+的M3MgSi2O8（M＝Sr，Ba）荧光粉，这两种荧光粉在UV光激发下发射出较强的蓝紫色光，报道了它们室温下的激发光谱和发射光谱以及77K低温下的荧光光谱．阐述了在这两种焦硅酸盐体系中，Ce3+均形成两个发光中心，且随Sr，Ba顺序，荧光体发射峰稍稍向短波移动．
The spectral properties of Ce3+ doped M3MgSi2O8(M=Sr, Ba) pyrosilicates at 298K and 77K were studied. Under UV light excitation, Ce3+ doped
M3MgSi2O8(M=Sr, Ba) pyrosilicates phosphors emit efficient bluish violet light. In the M3MgSi2O8(M=Sr,Ba) system the emission spectra of Ce3+ ions consist of the emission bands of
the transitions from the Ce3+ 5d→2F5/2 and 5d→2F7/2 levels, Ce3+ ions can substitute for Sr2+ or Ba2+ ions, and
then form two different emission centers, respectively. According to the order from Sr2+ to Ba2+ ion, with ionic radius increases,
the spectrum of this phosphor slightly shifts to short wavelength and the emission intensity decreases.
参考文献
| [1] | Tuan A D, Anthony F K, Charles F C. J. Electrochem. Soc., 1990, 137 (12): 3966--3969 2 Blasse G, Bril A. J. Chem. Phy., 1967, 47: 5139--5145 3 Land K R, Gibbon E F, Tien T Y, et al. J. Electrochem. Soc., 1971, 118: 918--923 4 Thomas L B. J. Electrochem. Soc., 1968, 15: 733--738 5 黄立辉, 王晓君, 张晓等. Ca3MgSi2O8中Ce3+的光谱性质. 第八届全国发光学术会议, 南昌: 1998. 10 |
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