Optical properties of core/multishell CdSe/Zn(S,Se) nanocrystals |
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| Authors: | Joël Bleuse Sophie Carayon Peter Reiss |
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| Institution: | a CEA-Grenoble, Département de Recherche Fondamentale sur la Matière Condensée, 17 rue des Martyrs, F-38054, Grenoble, CEDEX 9, France;b Service de Physique des Matériaux et Microstructures / CEA-CNRS-UJF Group “Nanophysique et Semiconducteurs”, France;c Service des Interfaces et des Matériaux Moléculaires et Macromoléculaires, Laboratoire de Physique des Métaux Synthétiques, France |
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| Abstract: | 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. |
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| Keywords: | Author Keywords: Nanocrystal CdSe Shell ZnSe |
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