Tuning the Exciton Diffusion Coefficient of Polyfluorene Based Semiconducting Polymers

Journal article

Sajjad, T., Ward, A. J, Ruseckas, A., Bansal, A. K, Allard, S., Scherf, U. and Samuel, I. DW (2018). Tuning the Exciton Diffusion Coefficient of Polyfluorene Based Semiconducting Polymers. physica status solidi (RRL)–Rapid Research Letters. 13 (3), pp. 1800500-1800500. https://doi.org/https://www.doi.org/10.1002/pssr.201800500
AuthorsSajjad, T., Ward, A. J, Ruseckas, A., Bansal, A. K, Allard, S., Scherf, U. and Samuel, I. DW
Abstract

Exciton diffusion plays an important role in functional materials used in organic optoelectronic devices, such as solar cells, organic light emitting diodes, and lasers. Here we explore how exciton diffusion can be controlled in highly fluorescent blue‐emitting polyfluorene materials by changing the length and type of side chains. We find that the exciton diffusion coefficient (D) decreases from 1.2 × 10−3 cm2 s−1 to 0.2×10−3 cm2 s−1 when the side chain length is increased from 8 to 12 carbon atoms. Other changes to the side chains led to enhancement of D up to 1.6 × 10−3 cm2 s−1. Our results show that small adjustments to the molecular structure can be helpful for the future development of high‐brightness organic light emitting devices.

Copyright © 2018 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1002/pssr.201800500

Year2018
Journalphysica status solidi (RRL)–Rapid Research Letters
Journal citation13 (3), pp. 1800500-1800500
PublisherWiley
ISSN1862-6254
Digital Object Identifier (DOI)https://doi.org/https://www.doi.org/10.1002/pssr.201800500
Publication dates
Print12 Dec 2018
Online08 Mar 2019
Publication process dates
Accepted31 Oct 2018
Deposited04 Feb 2020
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