Communication

Binary Organic Photovoltaic Blends: A Simple Rationale for Optimum Compositions†

  1. Christian Müller2,
  2. Toby A. M. Ferenczi3,
  3. Mariano Campoy-Quiles3,
  4. Jarvist M. Frost3,
  5. Donal D. C. Bradley3,
  6. Paul Smith1,2,
  7. Natalie Stingelin-Stutzmann1,2,*,
  8. Jenny Nelson3,*

Article first published online: 12 AUG 2008

DOI: 10.1002/adma.200800963

Issue

Advanced Materials

Advanced Materials

Volume 20, Issue 18, pages 3510–3515, September 17, 2008

Additional Information

How to Cite

Müller, C., Ferenczi, T. A. M., Campoy-Quiles, M., Frost, J. M., Bradley, D. D. C., Smith, P., Stingelin-Stutzmann, N. and Nelson, J. (2008), Binary Organic Photovoltaic Blends: A Simple Rationale for Optimum Compositions. Adv. Mater., 20: 3510–3515. doi: 10.1002/adma.200800963

Author Information

  1. 1

    Centre for Materials Research, Queen Mary University of London, London E1 4NS (UK)

  2. 2

    Department of Materials, Eidgenössische Technische Hochschule (ETH) Zürich 8093 Zürich (Switzerland)

  3. 3

    Department of Physics, Blackett Laboratory Imperial College London, London SW7 2AZ (UK)

*Centre for Materials Research, Queen Mary University of London, London E1 4NS (UK).

  1. †

    The authors would like to thank Prof. Iain McCulloch, Dr. Martin Heeney, and Maxim Shkunov (Merck Chemicals, UK) for supplying the P3HT homopolymer. P. S. wishes to express his profound gratitude to the Engineering, Materials and Physics (Emphysis) Consortium of Queen Mary, University of London for their invitation to participate in their Prestige Visiting Researcher Programme and to The Leverhulme Trust for granting a Visiting Professorship at Queen Mary, University of London. J. N. and D. D. C. B. acknowledge BP Solar (OSCER), the UK Department of Trade and Industry (Project No. TP/2/RT/6/I/10384) and the UK Engineering and Physical Sciences Research Council Excitonic Supergen Consortium for financial support. Supporting Information is available online from Wiley InterScience or from the author.

Publication History

  1. Issue published online: 5 SEP 2008
  2. Article first published online: 12 AUG 2008
  3. Manuscript Revised: 10 JUN 2008
  4. Manuscript Received: 8 APR 2008

Funded by

  • BP Solar (OSCER)
  • UK Department of Trade and Industry. Grant Number: TP/2/RT/6/I/10384
  • UK Engineering and Physical Sciences Research Council Excitonic Supergen Consortium

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Keywords:

  • Binary organic photovoltaic blends;
  • Eutectic solidification;
  • Phase behavior;
  • Organic solar cells;
  • Photovoltaic devices
Thumbnail image of graphical abstract

Polymer/small molecule binaries, such as P3HT:PC61BM display eutectic phase behavior with optimum photovoltaic performance at slightly hypoeutectic compositions (with respect to polymer content). Such hypoeutectic blends readily solidify into a finely phase-separated matrix surrounding primary crystals of the small-molecular species. The resulting large interfacial area and component connectivity is a desirable microstructure for bulk-heterojunction solar cells.

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