ePrints

Increased Electronic Coupling in Silicon Nanocrystal Networks Doped with F₄-TCNQ

Lookup NU author(s): Dr Alexandra Carvalho, Dr Mark Rayson, Professor Patrick Briddon

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.

Abstract

The modification of the electronic structure of silicon nanocrystals using an organic dopant, 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F-4-TCNQ), is investigated using first-principles calculations. It is shown that physisorbed F-4-TCNQ molecules have the effect of oxidizing the nanocrystal, attracting the charge density towards the F-4-TCNQ-nanocrystal interface, and decreasing the excitation energy of the system. In periodic F-4-TCNQ/nanocrystal superlattices, F-4-TCNQ is suggested to enhance exciton separation, and in the presence of free holes, to serve as a bridge for electron/hole transfer between adjacent nanocrystals.

Publication metadata

Author(s): Carvalho A, Oberg S, Rayson MJ, Briddon PR

Publication type: Article

Publication status: Published

Journal: Journal of Nanoscience and Nanotechnology

Year: 2013

Volume: 13

Issue: 2

Pages: 1035-1038

Print publication date: 01/02/2013

ISSN (print): 1533-4880

ISSN (electronic): 1533-4899

Publisher: American Scientific Publishers

URL: http://dx.doi.org/10.1166/jnn.2013.6129

DOI: 10.1166/jnn.2013.6129

Altmetrics

Funding

Share