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SICCSU

银虫 (小有名气)

[交流] 【交流】外行求助,Ce3+ 掺杂SiAlON荧光粉发光机理?

外行,看文献,遇到不懂之处,求指导.
“The longer-wavelength emission observed in cerium-doped α-SiAlON is due to the nephelauxetic effect and the increase of the ligand-field splitting of the 5d band, because the coordination of Ce3+ is enriched in nitrogen.”

1.为什么Ce3+ enriched in nitrogen 会导致ligand-field splitting of the 5d band?
2.nephelauxetic effect 如何使cerium-doped α-SiAlON发射长光学波?
3.the ligand-field splitting of the 5d band是指5d由什么状态变至什么状态?
4.the ligand-field splitting of the 5d band如何使cerium-doped α-SiAlON发射长光学波?

[ Last edited by SICCSU on 2010-10-27 at 19:44 ]
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SICCSU

银虫 (小有名气)

“掺杂后由于分子场能量发生了变化,所以导致5d 能带解简并。解简并后能及间隔变小,向长波方向偏移。”----十分感谢,但这个答案对于我而言,太抽象啦.
2楼2010-10-27 22:58:14
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njutzl

至尊木虫 (正式写手)

★ ★ ★
小木虫:)(金币+3):3q 2010-10-29 09:46:21
SICCSU(金币+2):yz 2010-11-01 18:36:11
在氮氧化物中,Ce3+周围的共价性增强,其电子云扩展效应增大,5d能级的劈裂增大,光谱红移。
3楼2010-10-29 08:38:28
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SICCSU

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请楼下的继续
4楼2010-11-01 18:35:48
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