☆ 4.5 Article

Comparative study: The effects of solvent on the morphology, optical and structural features of regioregular poly(3-hexylthiophene):fullerene thin films

SYNTHETIC METALS (2010)

Journal

SYNTHETIC METALS

Volume 160, Issue 9-10, Pages 876-882

Publisher

ELSEVIER SCIENCE SA

DOI: 10.1016/j.synthmet.2010.01.038

Keywords

Poly-3-hexylthiophene; Fullerene; Polymer solar cells; Morphology; Quenching; Crystallinity

Categories

Materials Science, Multidisciplinary Physics, Condensed Matter Polymer Science

Funding

Department of Science and Technology of South Africa
Council for Scientific Industrial Research (CSIR), South Africa [HGERA7S]

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Abstract

In this report the effect of solvent to control the degree of mixing of the polymer and fullerene components, as well as the domain size and charge transport properties of the blends were investigated in detail using P3HT:C-60 films. The polymer blend films spin coated from faster evaporating, non-aromatic solvents demonstrated an improved ordering and optical absorption in P3HT and blended films, indicating that the limited solubility of P3HT:C-60 in a marginal solvent can lead directly to optimal morphologies on the films. The PL quenched by a factor of 3 after blending the P3HT with C-60 in a 1:1 wt. ratio using CB, xylene. DCB, and toluene as solvents, indicating a partially charge transfer from P3HT to C-60. A complete reduction in the PL intensity was observed in the film spin-coated from chloroform. (C) 2010 Elsevier B.V. All rights reserved.

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