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• Journal article
  Bronstein H, Ashraf RS, Kim Y, White AJP, Anthopoulos T, Song K, James D, Zhang W, McCulloch Iet al., 2011,

  Synthesis of a Novel Fused Thiophene-thieno[3,2-b]thiophene-thiophene Donor Monomer and Co-polymer for Use in OPV and OFETs

  , MACROMOLECULAR RAPID COMMUNICATIONS, Vol: 32, Pages: 1664-1668, ISSN: 1022-1336
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  • Citations: 39
• Journal article
  Zhang XR, Richter LJ, DeLongchamp DM, Kline RJ, Hammond MR, McCulloch I, Heeney M, Ashraf RS, Smith JN, Anthopoulos TD, Schroeder B, Geerts YH, Fischer DA, Toney MFet al., 2011,

  Molecular Packing of High-Mobility Diketo Pyrrolo-Pyrrole Polymer Semiconductors with Branched Alkyl Side Chains

  , J AM CHEM SOC, Vol: 133, Pages: 15073-15084, ISSN: 0002-7863
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• Journal article
  Chen Z, Bird M, Lemaur V, Radtke G, Cornil J, Heeney M, McCulloch I, Sirringhaus Het al., 2011,

  Origin of the different transport properties of electron and hole polarons in an ambipolar polyselenophene-based conjugated polymer

  , PHYSICAL REVIEW B, Vol: 84, ISSN: 2469-9950
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  • Citations: 40
• Journal article
  Bronstein H, Leem DS, Hamilton R, Woebkenberg P, King S, Zhang W, Ashraf RS, Heeney M, Anthopoulos TD, de Mello J, McCulloch Iet al., 2011,

  Indacenodithiophene-<i>co</i>-benzothiadiazole Copolymers for High Performance Solar Cells or Transistors via Alkyl Chain Optimization

  , MACROMOLECULES, Vol: 44, Pages: 6649-6652, ISSN: 0024-9297
  • Author Web Link
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  • Citations: 158
• Conference paper
  Donaghey JE, Ashraf S, Zhang W, Schroeder B, Smith J, Anthopoulos T, Williams C, McCulloch Iet al., 2011,

  Pyrroloindacenodithiophene containing polymers: Synthesis and characterization

  , 242nd National Meeting of the American-Chemical-Society (ACS), Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
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• Journal article
  Miller NC, Gysel R, Miller CE, Verploegen E, Beiley Z, Heeney M, McCulloch I, Bao Z, Toney MF, McGehee MDet al., 2011,

  The Phase Behavior of a Polymer-Fullerene Bulk Heterojunction System that Contains Bimolecular Crystals

  , JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, Vol: 49, Pages: 499-503, ISSN: 0887-6266
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  • Citations: 68
• Journal article
  Bronstein H, Chen Z, Ashraf RS, Zhang W, Du J, Durrant JR, Tuladhar PS, Song K, Watkins SE, Geerts Y, Wienk MM, Janssen RAJ, Anthopoulos T, Sirringhaus H, Heeney M, McCulloch Iet al., 2011,

  Thieno[3,2-<i>b</i>]thiophene-Diketopyrrolopyrrole-Containing Polymers for High-Performance Organic Field-Effect Transistors and Organic Photovoltaic Devices

  , JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 133, Pages: 3272-3275, ISSN: 0002-7863
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  • Citations: 817
• Journal article
  George WN, Giles M, McCulloch I, Steinke JHG, deMello JCet al., 2011,

  Efficient Quenching of a Guanidinium-Containing Fluorescence Sensor

  , CHEMPHYSCHEM, Vol: 12, Pages: 765-768, ISSN: 1439-4235
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  • Citations: 6
• Journal article
  Lee MJ, Gupta D, Zhao N, Heeney M, McCulloch I, Sirringhaus Het al., 2011,

  Anisotropy of Charge Transport in a Uniaxially Aligned and Chain-Extended, High-Mobility, Conjugated Polymer Semiconductor

  , ADVANCED FUNCTIONAL MATERIALS, Vol: 21, Pages: 932-940, ISSN: 1616-301X
  • Author Web Link
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  • Citations: 159
• Journal article
  Ashraf RS, Chen ZY, Leem DS, Bronstein H, Zhang WM, Schroeder B, Geerts Y, Smith J, Watkins S, Anthopoulos TD, Sirringhaus H, de Mello JC, Heeney M, McCulloch Iet al., 2011,

  Silaindacenodithiophene Semiconducting Polymers for Efficient Solar Cells and High-Mobility Ambipolar Transistors

  , CHEM MATER, Vol: 23, Pages: 768-770, ISSN: 0897-4756
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• Journal article
  Smith J, Heeney M, McCulloch I, Malik JN, Stingelin N, Bradley DDC, Anthopoulos TDet al., 2011,

  Percolation behaviour in high mobility p-channel polymer/small-molecule blend organic field-effect transistors

  , ORGANIC ELECTRONICS, Vol: 12, Pages: 143-147, ISSN: 1566-1199
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  • Citations: 42
• Journal article
  Nielsen CB, Schroeder BC, Hadipour A, Rand BP, Watkins SE, McCulloch Iet al., 2011,

  A benzotrithiophene-based low band gap polymer for polymer solar cells with high open-circuit voltage

  , Journal of Materials Chemistry, Vol: 21, Pages: 17642-17645, ISSN: 0959-9428

  A new benzotrithiophene-containing donor-acceptor type copolymer for polymer solar cells is reported. The promise of benzotrithiophene as a weak donor material is reflected in a polymer band gap of 1.75 eV affording a high Voc of 0.81 V and a moderate PCE of 2.2% in a polymer solar cell.

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• Journal article
  Brabec CJ, Heeney M, McCulloch I, Nelson Jet al., 2011,

  Influence of blend microstructure on bulk heterojunction organic photovoltaic performance

  , CHEMICAL SOCIETY REVIEWS, Vol: 40, Pages: 1185-1199, ISSN: 0306-0012
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  • Citations: 483
• Journal article
  Soon YW, Clarke TM, Zhang W, Agostinelli T, Kirkpatrick J, Dyer-Smith C, McCulloch I, Nelson J, Durrant JRet al., 2011,

  Energy versus electron transfer in organic solar cells: a comparison of the photophysics of two indenofluorene: fullerene blend films

  , Chemical Science, Vol: 2, Pages: 1111-1120, ISSN: 2041-6520

  In this paper, we compare the photophysics and photovoltaic device performance of two indenofluorene based polymers: poly[2,8-(6,6,12,12-tetraoctylindenofluorene)-co-4,7-(2,1,3-benzothiodiazole] (IF8BT) and poly[2,8-(6,6,12,12-tetraoctylindenofluorene)-co-5,5-(4[prime or minute],7[prime or minute]-di-2-thienyl-2[prime or minute],1[prime or minute],3[prime or minute]-benzothiodiazole] (IF8TBTT) blended with [6,6]-phenyl C61 butyric acid methyl ester (PCBM). Photovoltaic devices made with IF8TBTT exhibit greatly superior photocurrent generation and photovoltaic efficiency compared to those made with IF8BT. The poor device efficiency of IF8BT/PCBM devices is shown to result from efficient, ultrafast singlet Forster energy transfer from IF8BT to PCBM, with the resultant PCBM singlet exciton lacking sufficient energy to drive charge photogeneration. The higher photocurrent generation observed for IF8TBTT/PCBM devices is shown to result from IF8TBTT's relatively weak, red-shifted photoluminescence characteristics, which switches off the polymer to fullerene singlet energy transfer pathway. As a consequence, IF8TBTT singlet excitons are able to drive charge separation at the polymer/fullerene interface, resulting in efficient photocurrent generation. These results are discussed in terms of the impact of donor/acceptor energy transfer upon photophysics and energetics of charge photogeneration in organic photovoltaic devices. The relevance of these results to the design of polymers for organic photovoltaic applications is also discussed, particularly with regard to explaining why highly luminescent polymers developed for organic light emitting diode applications often give relatively poor performance in organic photovoltaic devices.

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• Journal article
  Nielsen CB, Fraser JM, Schroeder BC, Du JP, White AJP, Zhang WM, McCulloch Iet al., 2011,

  Benzotrithiophene - A Planar, Electron-Rich Building Block for Organic Semiconductors

  , Organic Letters, Vol: 13, Pages: 2414-2417, ISSN: 1523-7060

  Several functionalized benzo[1,2-b:3,4-b':5,6-d']trithiophenes have been synthesized and characterized. The fully planar and highly electron-rich material shows great promise as the donor constituent in donor-acceptor type copolymers for use in organic electronics. As a proof of concept, a copolymer with the electron acceptor, 2,1,3-benzothiadiazole, has been prepared. Side-chain modifications have been employed to adjust both the electron-rich character of the monomer and the solubility and processability of the polymer.

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