Title

P3Ht Chain Morphology In Composite P3Ht/Pcbm Nanoparticles Studied By Single Particle Fluorescence Excitation Polarization Spectroscopy

Keywords

anisotropy; Conjugated polymer; fullerene; morphology; nanoparticle; OPV; polarization; polythiophene

Abstract

The use of conjugated polymers such as poly(3-hexylthiophene) (P3HT) in the active layers of plastic electronic devices could provide a more practical and accessible form of energy production and storage. The efficiency of these devices is intimately connected to the morphology of the polymer chains in the active layer materials, as polymer folding affects mesoscale material morphology. The latter in turn influences electronic structure and thus performance of the active layer. It is, however, highly challenging to determine molecular structure and folding properties in a bulk material. Here, it is shown that through the use of nanoparticles as a model system for the bulk material insight in molecular morphology can be gained through single particle fluorescence excitation spectroscopy. The study of P3HT chain morphologies was accomplished through the investigation of neat (0 wt% PCBM) P3HT nanoparticles and 25, 50 and 75 wt% PCBM blended P3HT nanoparticles. A striking discontinuous trend in P3HT chain morphology as a function of PCBM blending ratio was observed, where P3HT morphologies at 25 wt% and 75 wt% blending ratios appear to be more disordered than those observed for the 50 wt% blending ratio. These data suggest that at least from the morphological perspective, the 1:1 blending ratio appears to yield the better P3HT chain alignment. Special Issue Comment: This paper about solving single molecule conformations is related to the papers in this Special Issue on mathematical models for treatment of single molecule trajectories,1 nonblinking inorganic nanocrystals,2 and hybrid quantom dot-fullerence composite nanoparticles.3 © 2013 World Scientific Publishing Company.

Publication Date

12-1-2013

Publication Title

Biophysical Reviews and Letters

Volume

8

Issue

3-4

Number of Pages

243-253

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1142/S1793048013500082

Socpus ID

84893097098 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84893097098

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