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Re-dispersible Li+ and Eu3+ co-doped CdS nanoparticles:: Luminescence studies
被引:36
作者:
Gajbhiye, N. S.
[2
]
Ningthoujam, Raghumani Singh
[1
]
Ahmed, Asar
[2
]
Panda, D. K.
[2
]
Umare, S. S.
[3
]
Sharma, S. J.
[4
]
机构:
[1] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India
[2] Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India
[3] Visvesvaraya Natl Inst Technol, Dept Chem, Nagpur 440011, Maharashtra, India
[4] SK Porwal Coll, Dept Elect, Nagpur 441002, Maharashtra, India
来源:
PRAMANA-JOURNAL OF PHYSICS
|
2008年
/
70卷
/
02期
关键词:
semiconductor;
luminescence;
lanthanide ions;
nanoparticles;
re-dispersible;
D O I:
10.1007/s12043-008-0050-z
中图分类号:
O4 [物理学];
学科分类号:
0702 ;
摘要:
Re-dispersible CdS, 5 at.% Eu3+-doped CdS, 2 at.% Li+ and 5 at.% Eu3+ co-doped CdS nanoparticles in organic solvent are prepared by urea hydrolysis in ethylene glycol medium at a low temperature of 170 degrees C. CdS nanoparticles have spherical shape with a diameter of similar to 80 nm. The asymmetric ratio (A(21)) of the integrated intensities of the electrical dipole transition to the magnetic dipole transition for 5 at.% Eu3+-doped CdS is found to be 3.8 and this ratio is significantly decreased for 2 at.% Li+ and 5 at.% Eu3+ co-doped CdS (A(21) = 2.6). It establishes that the symmetry environment of Eu3+ ion is more favored by Li-doping. Extra peak at 550 nm (green emission) could be seen for 2 and 5 at.% Eu3+ co-doped CdS. Also, the significant energy transfer from host CdS to Eu3+ is found for 5 at.% Eu3+-doped CdS compared to that for 2 at.% Li+ and 5 at.% Eu3+ co-doped CdS.
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页码:313 / 321
页数:9
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