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Crystallization-Driven Enhancement in Photovoltaic Performance through Block Copolymer Incorporation into P3HT:PCBM Blends
Université de Bordeaux, France.ORCID iD: 0000-0002-2589-4667
Université de Bordeaux, France.
Université de Bordeaux, France.
Université de Bordeaux, France.
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2013 (English)In: Macromolecules, ISSN 0024-9297, E-ISSN 1520-5835, Vol. 46, no 8, 3015-3024 p.Article in journal (Refereed) Published
Abstract [en]

We report the increased crystallization of poly(3-hexylthiophene)(P3HT) in the donor−acceptor mixture of [6,6]-phenyl-C61-butyric acid methylester (PCBM) with P3HT by the addition of a block copolymer, P3HT-b-PI, where PI refers to polyisoprene. The photovoltaic performance of devices created using this blendis markedly improved by the addition of the diblock copolymer. We have characterizedthe structure of thin films of the P3HT-b-PI containing mixtures using opticalmicroscopy, scanning force microscopy, UV−vis absorption spectroscopy, neutronreflectometry, and grazing incidence X-ray diffraction (GIXD). The GIXD data providethe information on the crystallinity of the films, the absorption data were used toconfirm that the addition of the diblock was responsible for the increase in crystallization, neutron reflectometry data reveal a PCBM-rich region near the hole injection layer, and the two microscopy techniques revealed the structural effect of the crystallization at the surface of the films.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2013. Vol. 46, no 8, 3015-3024 p.
National Category
Natural Sciences
Research subject
Energy Technology
Identifiers
URN: urn:nbn:se:kau:diva-64605DOI: 10.1021/ma302128hISI: 000318143500014OAI: oai:DiVA.org:kau-64605DiVA: diva2:1147418
Available from: 2017-10-05 Created: 2017-10-05 Last updated: 2017-10-11Bibliographically approved

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