Size-dependent single-particle energy levels and interparticle Coulomb interactions in CdSe quantum dots measured by scanning tunneling spectroscopy
- 3 March 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 73 (11) , 115305
- https://doi.org/10.1103/physrevb.73.115305
Abstract
We report on tunneling spectroscopy measurements on colloidal CdSe quantum dots of different sizes. The size-dependent energy level structure and electron-hole Coulomb attraction in CdSe quantum dots are obtained by a combination of shell-tunneling spectroscopy and optical spectroscopy. The results are in good agreement with tight-binding calculations. The electron-electron interactions are investigated by shell-filling spectroscopy. The tunneling spectra in this regime are analyzed by solving the master equation for the electron and hole occupancy of the quantum dot.Keywords
This publication has 28 references indexed in Scilit:
- Small Is Different: Shape-, Size-, and Composition-Dependent Properties of Some Colloidal Semiconductor NanocrystalsAccounts of Chemical Research, 2004
- Wave-Function Mapping of InAs Quantum Dots by Scanning Tunneling SpectroscopyPhysical Review Letters, 2003
- Tunneling and Optical Spectroscopy of Semiconductor NanocrystalsAnnual Review of Physical Chemistry, 2003
- Imaging and Spectroscopy of Artificial-Atom States in Core/Shell Nanocrystal Quantum DotsPhysical Review Letters, 2001
- The Electronic Structure of Semiconductor NanocrystalsAnnual Review of Materials Science, 2000
- Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal AssembliesAnnual Review of Materials Science, 2000
- Imaging the Wave-Function Amplitudes in Cleaved Semiconductor Quantum BoxesPhysical Review Letters, 2000
- Identification of atomic-like electronic states in indium arsenide nanocrystal quantum dotsNature, 1999
- Semiconductor Clusters, Nanocrystals, and Quantum DotsScience, 1996
- Electron–electron and electron-hole interactions in small semiconductor crystallites: The size dependence of the lowest excited electronic stateThe Journal of Chemical Physics, 1984