Temperature-Dependent Photoluminescence of CdSe-Core CdS/CdZnS/ZnS-Multishell Quantum Dots

	Temperature-Dependent Photoluminescence of CdSe-Core CdS/CdZnS/ZnS-Multishell Quantum Dots
其他题名	论文其他题名
	Jing P. T.; Zheng J. J.; Ikezawa M.; Liu X. Y.; Lv S. Z.; 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:31 页码:13545-13550
摘要	The photoluminescence (PL) spectra of CdSe-core CdS/CdZnS/ZtiS-multishell quantum dots (QDs) were studied to understand the radiative and nonradiative relaxation processes in the temperature range from 80 to 360 K. The mechanism of temperature-dependent nonradiative relaxation processes in the CdSe QDs with changing the shell structures was found to evolve from thermal activation of carrier trapping by surface defects/traps in CdSe core QDs to the multiple longitudinal-optical (LO) phonon-assisted thermal escape of carriers in the core/shell QDs. An increase in PL intensity with increasing temperature was clearly observed in the core/shell QDs with a thick US rnonoshell and a CdS/ZnCdS/ZnS multishell. The PL enhancement was considered to come from delocalization of charge carriers localized at the CdSe/CdS interface with the potential depth of similar to 30 meV. The experimental results indicated that the improvement of PL quantum efficiency in CdSe-core CdS/CdZnS/ZnS-multishell QDs could be understood in terms of the reduction of nonradiative recombination centers at the interfaces and on the surface of the multishell, as well as the confinement of electrons and holes into the QDs by an outer ZnS shell.
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/181722/26266
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Jing P. T.,Zheng J. J.,Ikezawa M.,et al. Temperature-Dependent Photoluminescence of CdSe-Core CdS/CdZnS/ZnS-Multishell Quantum Dots[J]. Journal of Physical Chemistry C,2009,113(31):13545-13550.
APA	Jing P. T..,Zheng J. J..,Ikezawa M..,Liu X. Y..,Lv S. Z..,...&Masumoto Y..(2009).Temperature-Dependent Photoluminescence of CdSe-Core CdS/CdZnS/ZnS-Multishell Quantum Dots.Journal of Physical Chemistry C,113(31),13545-13550.
MLA	Jing P. T.,et al."Temperature-Dependent Photoluminescence of CdSe-Core CdS/CdZnS/ZnS-Multishell Quantum Dots".Journal of Physical Chemistry C 113.31(2009):13545-13550.

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