| Autor: |
Rafipoor, Mona, Tornatzky, Hans, Dupont, Dorian, Maultzsch, Janina, Tessier, Mickael D., Hens, Zeger, Lange, Holger |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 10/21/2019, Vol. 151 Issue 15, pN.PAG-N.PAG, 6p, 1 Black and White Photograph, 6 Graphs |
| Abstrakt: |
We investigate the buildup of strain in InP quantum dots with the addition of shells of the lower-lattice constant materials ZnSe and ZnS by Raman spectroscopy. Both materials induce compressive strain in the core, which increases with increasing shell volume. We observe a difference in the shell behavior between the two materials: the thickness-dependence points toward an influence of the material stiffness. ZnS has a larger Young's modulus and requires less material to develop stress on the InP lattice at the interface, while ZnSe requires several layers to form a stress-inducing lattice at the interface. This hints at the material stiffness being an additional parameter of relevance for designing strained core/shell quantum dots. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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