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Int. J. Mol. Sci. 2010, 11(4), 1471-1508; doi:10.3390/ijms11041471

Acetylene-Based Materials in Organic Photovoltaics

Department of Materials Science, University of Milan–Bicocca, via Cozzi, 53, I-20125, Milan, Italy
Department of Chemistry, University of Perugia, via Elce di Sotto, 8, I-06123 Perugia, Italy
Present address: Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, HCI G 304 Wolfgang-Pauli-Straβe 10, CH-8093 Zürich, Switzerland; E-Mail:
Author to whom correspondence should be addressed.
Received: 15 March 2010 / Accepted: 29 March 2010 / Published: 8 April 2010
(This article belongs to the Special Issue Solar Cells)


Fossil fuel alternatives, such as solar energy, are moving to the forefront in a variety of research fields. Organic photovoltaic systems hold the promise of a lightweight, flexible, cost-effective solar energy conversion platform, which could benefit from simple solution-processing of the active layer. The discovery of semiconductive polyacetylene by Heeger et al. in the late 1970s was a milestone towards the use of organic materials in electronics; the development of efficient protocols for the palladium catalyzed alkynylation reactions and the new conception of steric and conformational advantages of acetylenes have been recently focused the attention on conjugated triple-bond containing systems as a promising class of semiconductors for OPVs applications. We review here the most important and representative (poly)arylacetylenes that have been used in the field. A general introduction to (poly)arylacetylenes, and the most common synthetic approaches directed toward making these materials will be firstly given. After a brief discussion on working principles and critical parameters of OPVs, we will focus on molecular arylacetylenes, (co)polymers containing triple bonds, and metallopolyyne polymers as p-type semiconductor materials. The last section will deal with hybrids in which oligomeric/polymeric structures incorporating acetylenic linkages such as phenylene ethynylenes have been attached onto C60, and their use as the active materials in photovoltaic devices.
Keywords: acetylenes; triple-bond; conjugated polymers; poly(arylene ethynylenes); solar cells; organic photovoltaics acetylenes; triple-bond; conjugated polymers; poly(arylene ethynylenes); solar cells; organic photovoltaics

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Silvestri, F.; Marrocchi, A. Acetylene-Based Materials in Organic Photovoltaics. Int. J. Mol. Sci. 2010, 11, 1471-1508.

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