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Non-local density functional description of poly-para-phenylene vinylene

Zheng, G; Clark, SJ; Brand, S; Abram, RA

Authors

G Zheng

S Brand



Abstract

A fully non-local exchange-correlation formalism within the framework of density functional theory, known as the weighted density approximation (WDA), has been applied to the conjugated polymer poly-para-phenylene vinylene (PPV) and is shown to lead to a marked improvement in the agreement of theory and experiment for the electronic band structure of the conjugated polymer. In particular, some new model WDA functions are developed, which substantially increase the electronic band gap of the polymer relative to those obtained with the local density approximation and generalized gradient approximation. The calculated band gap of PPV is quantitatively or at least semiquantitatively in agreement with the experimental data.

Citation

Zheng, G., Clark, S., Brand, S., & Abram, R. (2007). Non-local density functional description of poly-para-phenylene vinylene. Chinese Physics Letters, 24(3), 807-810. https://doi.org/10.1088/0256-307x/24/3/061

Journal Article Type Article
Publication Date Mar 1, 2007
Deposit Date Sep 14, 2010
Journal Chinese Physics Letters
Print ISSN 0256-307X
Electronic ISSN 1741-3540
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 24
Issue 3
Pages 807-810
DOI https://doi.org/10.1088/0256-307x/24/3/061
Keywords Inhomogeneous electron-systems, Conjugated polymers, Hartree-Fock, Approximation, Exchange, 1st-principles, Formalism, Molecules, Semiconductors, Dynamics.