Efficient Photoluminescence of Mn2+ Ions in MnS/ZnS Core/Shell Quantum Dots

	Efficient Photoluminescence of Mn2+ Ions in MnS/ZnS Core/Shell Quantum Dots
其他题名	论文其他题名
	Zheng J. J.; Yuan X.; Ikezawa M.; Jing P. T.; Liu X. Y.; Zheng Z. H.; Kong X. G.; Zhao J. L.; Masumoto Y.
	2009
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	113 期号:39 页码:16969-16974
摘要	We have studied the mechanism of photoluminescence (PL) from MnS/ZnS core/shell quantum dots (QDs) synthesized via hot solution phase chemistry using a nucleation-doping strategy. Efficient PL of the Mn2+ ions with a quantum yield (QY) of over 35% is demonstrated in the resulting QDs coated with a thick ZnS shell oil the MnS core. The MnS/ZnS core/shell QDs with a thick shell exhibit PL enhancement with increasing temperature in the range between 140 and 300 K, resulting from the thermal activation of charge carriers localized at the interface between the MnS core and the ZnS shell. The PL decays of the Mn2+ ions in the core/shell QDs consist of three exponential components with time constants oil the scales of 1-2 ms, hundreds of mu s, and tens of mu s. Surprisingly, the PL lifetimes of Mn2+, ions show a very weak dependence on the shell thickness, which is clearly different from that of the PL QY of the QDs. The experimental results indicate that the mechanism for improving the PL QY in MnS/ZnS QDs can be understood in terms of a significantly enhanced energy transfer from the ZnS shell to Mn2+ ions and a slightly decreased nonradiative relaxation rate from Mn2+ ions to surface states/traps of the ZnS shell by the surface passivation of the QDs with a thick ZnS shell.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/24789
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zheng J. J.,Yuan X.,Ikezawa M.,et al. Efficient Photoluminescence of Mn2+ Ions in MnS/ZnS Core/Shell Quantum Dots[J]. Journal of Physical Chemistry C,2009,113(39):16969-16974.
APA	Zheng J. J..,Yuan X..,Ikezawa M..,Jing P. T..,Liu X. Y..,...&Masumoto Y..(2009).Efficient Photoluminescence of Mn2+ Ions in MnS/ZnS Core/Shell Quantum Dots.Journal of Physical Chemistry C,113(39),16969-16974.
MLA	Zheng J. J.,et al."Efficient Photoluminescence of Mn2+ Ions in MnS/ZnS Core/Shell Quantum Dots".Journal of Physical Chemistry C 113.39(2009):16969-16974.

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