Size Dependent Electronic Level Structure of InAs Nanocrystal Quantum Dots: Test of Multiband Effective Mass Theory

Published

August 1, 1998

Author(s)

U Banin, J C. Lee, A A. Guzelian, A V. Kadavanich, A P. Alivastos, Garnett W. Bryant, A L. Efros, M Rose, W Jaskolski

Abstract

The size dependence of the electronic spectrum of InAs nanocrystals ranging in radius from 10 to 35 Angstrom} has been studied by size-selective spectroscopy. An eight-band effective mass theory of the quantum size levels has been developed which describes the observed absorption level structure and transition intensities very well down to smallest crystal size using bulk band parameters. This model generalizes the six-band model which works well in CdSe nanocrystals and should adequately describe most direct semiconductor nanocrystals with band edge at the γ-point of the Brillouin zone.

Citation

Journal of Chemical Physics

Volume

109

Issue

No. 6

Pub Type

Journals

Keywords

effective mass theory, energy bands, InAs, nanocrystals, nonparabolicity, photoluminescence excitation, quantum confinement, size-selective spectroscopy

Citation

Banin, U. , Lee, J. , Guzelian, A. , Kadavanich, A. , Alivastos, A. , Bryant, G. , Efros, A. , Rose, M. and Jaskolski, W. (1998), Size Dependent Electronic Level Structure of InAs Nanocrystal Quantum Dots: Test of Multiband Effective Mass Theory, Journal of Chemical Physics (Accessed July 27, 2024)