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Change of exciton energy in ultrafine particles with a charge on its surface
Author(s) -
Lai ZuYou,
Gu ShiWei,
Zhou Bingsuo,
Xiao Liangzhi,
Lee Tiejing
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221740211
Subject(s) - exciton , dipole , dielectric , surface charge , hamiltonian (control theory) , charge (physics) , condensed matter physics , materials science , atomic physics , molecular physics , physics , optoelectronics , quantum mechanics , mathematical optimization , mathematics
The Hamiltonian of the exciton in an ultrafine particle (UFP) with a charge on and a dipole at its surface is given. The exciton energy is calculated as a function of the charge number, the dielectric constant of the medium outside the UFP, and the strength of the dipole. The results for ZnO and CdS UFP indicate that the changes of the exciton energy due to the charge and the dielectric constant outside the UFP are of the same order.