Elsevier

Tetrahedron Letters

Volume 55, Issue 32, 6 August 2014, Pages 4430-4432
Tetrahedron Letters

A solution-processable electron acceptor based on diketopyrrolopyrrole and naphthalenediimide motifs for organic solar cells

https://doi.org/10.1016/j.tetlet.2014.06.017Get rights and content

Abstract

A novel, solution-processable small molecular electron acceptor (HP1) based on diketopyrrolopyrrole and naphthalenediimide fragments was designed and synthesized via a Stille coupling reaction, characterized by spectroscopic means, and exhibited excellent solubility and thermal stability. HP1 exerted strong and very broad absorption tailing into the near infra-red region, with appropriate energy levels matching with the archetypal electron donor, poly(3-hexylthiophene) (P3HT), and afforded 1.02% power conversion efficiency with a high open-circuit voltage (1.05 V) when tested in solution-processable bulk-heterojunction devices.

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Acknowledgements

H.P. acknowledges the assistance of Dr Jegadesan Subbiah from Bio21 Institute, University of Melbourne VIC 3010 for providing support and guidance during the fabrication of BHJ devices. S.V.B. acknowledges financial support from the Australian Research Council, Australia under a Future Fellowship Scheme (FT110100152) and the School of Applied Sciences (RMIT University) for facilities. The RMIT University, Melbourne VIC 3001 and CSIRO Materials Science and Engineering (CMSE) Clayton is

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