期刊
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
卷 21, 期 2-4, 页码 331-335出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physe.2003.11.044
关键词
nanocrystal; CdSe; shell; ZnSe
CdSe nanocrystals are now known as highly efficient fluorescent light sources. Their efficiency is however strongly dependent on the quality of the passivation layers. We show here that using a ZnSe/ZnS bi-layer shell leads to a larger photoluminescence yield than both ZnSe and ZnS simple shells. The intermediate ZnSe layer acts as a lattice parameter adaptation layer to improve on the core/shell interface quality, while the ZnS outer shell maximizes the exciton confinement. (C) 2003 Elsevier B.V. All rights reserved.
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