Title

Localization Of Electronic Excitations In Conjugated Polymers Studied By Dft

Abstract

We present an extensive density functional theory (DFT) study on the neutral and charged electronic excitations in oligophenylene vinylenes including lowest singlet (S1) and triplet (T1) excitons and positive (P+) and negative (P-) polarons. We investigated the vibrational and electronic properties of molecules using five different DFT functionals from pure GGA to long-range-corrected hybrids and found an explicit correlation between the spatial extent of the state and the fraction of the orbital exchange. While solvent effects are found to be negligible for neutral (S1 and T1) excitons, they play an important role for charged (P+ and P-) species. S1 states are observed to be spatially less localized compared to the polaronic wave functions (P+ and P-). This is in contrast to the T1 states, which exhibit more spatial confinement in comparison to P+ and P- states. © 2011 American Chemical Society.

Publication Date

3-17-2011

Publication Title

Journal of Physical Chemistry Letters

Volume

2

Issue

6

Number of Pages

566-571

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/jz101740w

Socpus ID

79952808447 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79952808447

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