Investigating the Mechanism of Post-Treatment on PEDOT:PSS via Single-Particle Absorption Spectroscopy

24 June 2019, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The conductive polymer PEDOT:PSS, widely used in optoelectronic devices, exhibits improved conductivity upon post-treatment, but the mechanism of this improvement is difficult to fully ascertain. The effects of thermal annealing and DMSO post-treatment on PEDOT:PSS, from the nano- to mesoscale, are studied using single-particle absorption spectroscopy. An average decrease in size and apparent increase in rotational order of individual particles are observed with both treatments, including unexpected correlations between change in rotational order and initial properties. Simulation of these transformations and correlations occurring during the annealing process reveal that the effects of DMSO-post treatment can be explained by oligomer depletion and do not explicitly require conformational changes including oligomer rotation.

Keywords

single particle
PEDOT:PSS
post-treatment
conductive polymer
microresonator

Supplementary materials

Title
Description
Actions
Title
PEDOTPSSS DMSO SI v10
Description
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