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Article overview
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The Electronic Structure of CdSe/CdS Core/Shell Seeded Nanorods: Type-I or Quasi-Type-II? | Hagai Eshet
; Michael Grunwald
; Eran Rabani
; | Date: |
23 Jul 2013 | Abstract: | The electronic structure of CdSe/CdS core/shell seeded nanorods of
experimentally relevant size is studied using a combination of molecular
dynamics and semiempirical pseudopotential techniques, with the aim to address
the transition from type-I to a quasi-type-II band alignment. The hole is found
to be localized in the core region regardless of its size. When electron-hole
interactions are neglected, we observe little overlap of electron density with
the core region, consistent with type-II behavior. When electron-hole
interactions are taken into account, we find that the overlap of the electron
density with the core decreases with decreasing size, consistent with a
transition to quasi-type II. We attribute this transition to an interplay of
electron-hole interactions and volume effects, and not to band alignment. Our
results provide insight to both scanning tunneling and optical measurements. | Source: | arXiv, 1307.6097 | Services: | Forum | Review | PDF | Favorites |
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