| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 609772 | Journal of Colloid and Interface Science | 2010 | 5 Pages |
New type-II structures of CdSe/InP and InP/CdSe core–shell nanocrystals which have staggered bandgap alignment were fabricated. Using a simple model for the wave function for electrons and holes in InP/CdSe and CdSe/InP core/shell nanocrystals showed the wave function of the electron and hole spread into the shell, respectively. The probability density of the InP/CdSe and CdSe/InP core/shell QDs also showed a similar tendency. As a result, the structure exhibits increased delocalization of electrons and holes, leading to a red-shift in absorption and emission. Quantum yield increased in the InP/CdSe, however decreased in the CdSe/InP. The reason may be due to the surface trap and high activation barrier for de-trapping in the InP shell.
Graphical abstractNew type-II structures of CdSe/InP and InP/CdSe core–shell nanocrystals which have staggered bandgap alignment were fabricated. The simply modeled wave function for electrons and holes in InP/CdSe and CdSe/InP core/shell nanocrystals showed the wave function of the electron and hole spread into the shell, respectively. As a result, the structure exhibits increased delocalization of electrons and holes, leading to a red-shift in absorption and emission.Figure optionsDownload full-size imageDownload high-quality image (99 K)Download as PowerPoint slide
