Thermal stability of Mn2+ ion luminescence in Mn-doped core-shell quantum dots

	Thermal stability of Mn2+ ion luminescence in Mn-doped core-shell quantum dots
	Yuan X.; Zheng J. J.; Zeng R. S.; Jing P. T.; Ji W. Y.; Zhao J. L.; Yang W. Y.; Li H. B.
	2014
发表期刊	Nanoscale
ISSN	ISBN/2040-3364
卷号	6 期号:1 页码:300-307
摘要	The thermal stability of luminescence is important for the application of quantum dots (QDs) in lightemitting devices. The temperature-dependent photoluminescence (PL) intensities and decay times of Mn-doped ZnS, ZnSe, and ZnSeS alloyed core-shell QD films were studied in the temperature range from 80 to 500 K by steady-state and time-resolved PL spectroscopy. It was found that the thermal stability of Mn-doped QD emissions was significantly dependent on the shell thickness and the host bandgap, which was higher than that of workhorse CdSe QDs. Nearly no PL quenching took place in Mn: ZnS QDs with a thick ZnS shell, which kept a high PL quantum yield (QY) of similar to 50% even at 500 K; and the thermally stable PL was also observed in highly luminescent Mn: ZnSe and Mn: ZnSeS QDs with a quenching temperature over 200 degrees C. Further, the stability of Mn-doped QDs with different shell thickness at high temperature was also examined through heating-cooling cycling experiments. The PL quenching in the thick shell-coated Mn-doped QDs was almost totally recovered. The PL quenching mechanisms of the Mn2+ ion emissions were discussed.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/44470
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Yuan X.,Zheng J. J.,Zeng R. S.,et al. Thermal stability of Mn2+ ion luminescence in Mn-doped core-shell quantum dots[J]. Nanoscale,2014,6(1):300-307.
APA	Yuan X..,Zheng J. J..,Zeng R. S..,Jing P. T..,Ji W. Y..,...&Li H. B..(2014).Thermal stability of Mn2+ ion luminescence in Mn-doped core-shell quantum dots.Nanoscale,6(1),300-307.
MLA	Yuan X.,et al."Thermal stability of Mn2+ ion luminescence in Mn-doped core-shell quantum dots".Nanoscale 6.1(2014):300-307.

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