Changchun Institute of Optics,Fine Mechanics and Physics,CAS
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
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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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