Influence of dielectric environment on exciton and bi-exciton properties in colloidal, type II quantum dots
Miloszewski, JM, Walsh, TJE and Tomic, S 2015, 'Influence of dielectric environment on exciton and bi-exciton properties in colloidal, type II quantum dots' , Journal of Physics: Conference Series, 609 , 012003.
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We present theoretical calculations of type II CdSe/CdTe quantum dots systems. We use an 8-band k.p Hamiltonian that includes spin-orbit interaction, strain, and first order piezoelectric effects. Exciton and bi-exciton states are found using the configuration interaction (CI) method that explicitly includes the effects of the Coulomb interaction, as well as exchange and correlation effects between many-electron configurations. We study convergence of the CI Hamiltonian with respect to the number of single particle states used in creation of the Hamiltonian. We show that there is a very strong correlation between the dielectric constant of the environment and exciton and bi-exciton energies.
|Schools:||Schools > School of Computing, Science and Engineering|
|Journal or Publication Title:||Journal of Physics: Conference Series|
|Funders:||Engineering and Physical Sciences Research Council (EPSRC)|
|Depositing User:||Prof Stanko Tomic|
|Date Deposited:||05 Apr 2016 10:50|
|Last Modified:||05 Apr 2016 10:50|
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