Shell-dependent electroluminescence from colloidal CdSe quantum dots in multilayer light-emitting diodes

	Shell-dependent electroluminescence from colloidal CdSe quantum dots in multilayer light-emitting diodes
其他题名	论文其他题名
	Jing P. T.; Zheng J. J.; Zeng Q. H.; Zhang Y. L.; Liu X. M.; Liu X. Y.; Kong X. G.; Zhao J. L.
	2009
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	105 期号:4
摘要	We report electroluminescence (EL) of colloidal CdSe/CdS, CdSe/ZnS, and CdSe/CdS/CdZnS/ZnS core/shell quantum dots (QDs) in multilayer light-emitting diodes (LEDs) fabricated by spin coating a near monolayer of the core/shell QDs on cross-linkable hole transporting layers. It is found that CdSe/CdS QD-LEDs exhibit a faster decrease in EL quantum efficiency (similar to 2% at a brightness of 100 cd/m(2)) with increasing current density and lower maximum brightness than those of CdSe/ZnS QD-LEDs. A more significant redshift and spectral broadening of the EL observed in CdSe core/shell QDs with a CdS or CdS/CdZnS/ZnS shell than with a ZnS shell indicate that the electron wave function can penetrate into the shell under electric field. The difference in device performance and EL spectra results from conduction band offsets between the CdSe cores and CdS or ZnS shells, suggesting the existence of the exciton ionization in the QD-LEDs.
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/181722/26228
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.,Zeng Q. H.,et al. Shell-dependent electroluminescence from colloidal CdSe quantum dots in multilayer light-emitting diodes[J]. Journal of Applied Physics,2009,105(4).
APA	Jing P. T..,Zheng J. J..,Zeng Q. H..,Zhang Y. L..,Liu X. M..,...&Zhao J. L..(2009).Shell-dependent electroluminescence from colloidal CdSe quantum dots in multilayer light-emitting diodes.Journal of Applied Physics,105(4).
MLA	Jing P. T.,et al."Shell-dependent electroluminescence from colloidal CdSe quantum dots in multilayer light-emitting diodes".Journal of Applied Physics 105.4(2009).

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