Abstract
We study inverted core/shell nanocrystals (NCs) in which a core of a wide gap semiconductor (ZnSe) is overcoated with a shell of a semiconductor of a narrower gap (CdSe). By monitoring radiative recombination lifetimes for a series of these NCs with a fixed core radius and progressively increasing shell thickness, we observe a continuous transition from Type-I (both electron and hole wave functions are distributed over the entire NC) to Type-II (electron and hole are spatially separated between the shell and the core) and back to Type-I (both electron and hole primarily reside in the shell) localization regimes. These observations are in good agreement with the calculated dependence of the electron-hole overlap integral on shell thickness.
| Original language | English |
|---|---|
| Pages (from-to) | 1485-1488 |
| Number of pages | 4 |
| Journal | Nano letters |
| Volume | 4 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 1 2004 |
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering
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Cite this
Balet, L. P., Ivanov, S. A., Piryatinski, A., Achermann, M., & Klimov, V. I. (2004). Inverted core/shell nanocrystals continuously tunable between type-I and type-II localization regimes. Nano letters, 4(8), 1485-1488. https://doi.org/10.1021/nl049146c