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1. 中国科学院长春应用化学研究所稀土化学与物理开放研究实验室,吉林 长春,130022
2. Division of Applied Science, Korea Institute of Science and Technology, P. O. Box 131,Seoul,Korea,130-650
纸质出版日期:2000-11-30,
收稿日期:2000-1-6,
修回日期:2000-6-13,
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尤洪鹏, 洪广言, 曾小青, Kim Chang-hong, Pyun Chong-hong, Park Cheol-hee. Zn<sub>2</sub>SiO<sub>4</sub>:Mn的VUV和UV光谱特性[J]. 发光学报, 2000,21(4): 349-352
YOU Hong-peng, HONG Guang-yan, ZENG Xiao-qing, Kim Chang-hong, Pyun Chong-hong, Park Cheol-hee. VUV and UV Spectral Properties of Zn<sub>2</sub>SiO<sub>4</sub>:Mn[J]. Chinese Journal of Luminescence, 2000,21(4): 349-352
尤洪鹏, 洪广言, 曾小青, Kim Chang-hong, Pyun Chong-hong, Park Cheol-hee. Zn<sub>2</sub>SiO<sub>4</sub>:Mn的VUV和UV光谱特性[J]. 发光学报, 2000,21(4): 349-352 DOI:
YOU Hong-peng, HONG Guang-yan, ZENG Xiao-qing, Kim Chang-hong, Pyun Chong-hong, Park Cheol-hee. VUV and UV Spectral Properties of Zn<sub>2</sub>SiO<sub>4</sub>:Mn[J]. Chinese Journal of Luminescence, 2000,21(4): 349-352 DOI:
采用高温固相反应法以硅酸为原料合成了等离子显示用荧光体Zn
2
SiO
4
:Mn
研究了Zn
2
SiO
4
:Mn的VUV和UV光谱特性
表明波长小于200nm的部分的基质吸收带主要是氧的2p轨道到锌的3d轨道跃迁产生的
波长大于200nm的部分的基质吸收带是氧的2p轨道到硅的3p轨道跃迁吸收。在VUV和UV激发下
Mn
2+
的浓度与发射强度的相关性研究表明
在不同区域激发时荧光体的发射强度随着Mn
2+
的浓度的变化存在明显不同。
Zn
2-x
SiO
4
:x Mn phosphors were synthesized at 1300℃ by high-temperature solid state reaction with silicic acid. X-ray powder diffraction data of Zn
2-x
SiO
4
:x Mn are in agreement with those of the JSPDS 37-1485 standard card
indicating that silicic acid is a good starting material for the synthesis of Zn
2
SiO
4
:Mn. Vacuum UV excitation and emission spectra were studied in detail. Considering the absorption from O
2-
2p orbital to Si
4+
3p orbital transition and that from O
2-
2p orbital to Zn
2+
3d orbital transition in the compounds
the absorption in the range from 200nm to 300nm may be mainly due to O
2-
2p orbital to Zn
2+
3d orbital transition
the absorption below 190nm may be mainly assigned to O
2-
2p orbital to Si
4+
3p orbital transition. The absorption peaks at about 346nm
386nm
420nm
440nm
and 480nm are due to
6
A
1
4
D
4
G transition
respectively. The emission spectrum under 254nm excitation consists of a band peak at about 525nm
this band is attributed to
4
T
1
6
A
1
transition. Considering the positions of Mn
2+
emission in different hosts
it reveals that Mn
2+
ions occupy tetrahedral sites. This result is in good agreement with surroundings of Zn
2+
ions
indicating that Mn
2+
ions replace Zn
2+
ions in the host. The relationship between the emission intensity and the concentration of Mn
2+
under VUV and UV excitation was also investigated. It was also found that the Mn
2+
concentration of the maximum emission under 147nm excitation is about 0.07
that of the maximum emission under 200nm excitation about 0.08
and that of the maximum emission under 254nm excitation about 0.10. This result shows that the mechanism on luminescent quench under VUV excitation is different from that of on luminescent quench under UV excitation. This result indirectly reveals that the absorption band peak at about 240nm is due to O
2-
2p orbital to Zn
2+
3d orbital transition.
Zn2SiO4:MnVUV光谱特性Mn2+的浓度
Zn2SiO4:MnVUV spectral propertyquenching concentration of Mn2+ ions
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