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• Conference paper
  Ballantyne AM, Wilson JS, Nelson J, Bradley DDC, Durrant JR, Heeney M, Duffy W, McCulloch Iet al., 2006,

  TOF mobility measurements in pristine films of P3HT: control of hole injection and influence of film thickness

  , Conference on Organic Photovoltaics VII, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
  • Author Web Link
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  • Citations: 5
• Journal article
  Kreouzis T, Poplavskyy D, Tuladhar SM, Campoy- Quiles M, Nelson J, Campbell AJ, Bradley DDCet al., 2006,

  Temperature and field dependence of hole mobility in poly(9,9-dioctylfluorene)

  , Phys Rev B 73, Vol: 73, Pages: 235201-1-235201-15, ISSN: 1098-0121
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• Journal article
  Peiró AM, Ravirajan P, Govender K, Boyle DS, O'Brien P, Bradley DDC, Nelson J, Durrant JRet al., 2005,

  The effect of zinc oxide nanostructure on the performance of hybrid polymer/zinc oxide solar cells

  , Proceedings of SPIE - The International Society for Optical Engineering, Vol: 5938, Pages: 1-8, ISSN: 0277-786X

  Solar cells fabricated from composites of conjugated polymers with nanostructured metal oxides are gaining interest on account of the stability, low cost and electron transport properties of metal oxides. Zinc oxide (ZnO)/polymer solar cells are promising compared to other metal oxide/polymer combinations, on account of the possibility of low temperature synthesis, as well as the potential for controlling interface morphology through simple processing from solution. Here, we focus on the effect of surface morphology of ZnO films on photovoltaic device performance. We have successfully grown ZnO nanorods standing almost perpendicular to the electrodes on a flat, dense ZnO "backing" layer. We studied structures consisting of a conjugated polymer in contact with three different types of ZnO layer: a flat ZnO backing layer alone; ZnO nanorods on a ZnO backing layer; and ZnO nanoparticles on a ZnO backing layer. We use scanning electron microscopy, steady state and transient absorption spectroscopies and photovoltaic device measurements to study the morphology, charge separation and recombination behaviour and device performance of the three types of structures. We find that charge recombination in the structures containing vertically aligned ZnO nanorods is remarkably slow, with a half life of over 1 ms, over two orders of magnitude slower than for randomly oriented ZnO nanoparticles. A photovoltaic device based on the nanorod structure which has been treated with an ambiphilic dye before deposition of poly(3-hexyl thiophene) (P3HT) polymer shows a power conversion efficiency over four times greater than for a similar device based on the nanoparticle structure. The best ZnO nanorods: P3HT device yields a short circuit current density of 2 mAcm -2 under AM 1.5 illumination (100mWem-2) and peak external quantum efficiency over 14%, resulting in a power conversion efficiency of 0.20%.

  • Abstract
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  • Citations: 6
• Journal article
  Kirkpatrick J, Nelson J, 2005,

  Theoretical study of the transfer integral and density of states in spiro-linked triphenylamine derivatives

  , JOURNAL OF CHEMICAL PHYSICS, Vol: 123, ISSN: 0021-9606
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  • Citations: 33
• Journal article
  Tuladhar SM, Poplavskyy D, Choulis SA, Durrant JR, Bradley DDC, Nelson Jet al., 2005,

  Ambipolar charge transport in films of methanofullerene and poly(phenylenevinylene)/methanofullerene blends

  , ADVANCED FUNCTIONAL MATERIALS, Vol: 15, Pages: 1171-1182, ISSN: 1616-301X
  • Author Web Link
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  • Citations: 229
• Journal article
  Ravirajan P, Bradley DDC, Nelson J, Haque SA, Durrant JR, Smit HJP, Kroon JMet al., 2005,

  Efficient charge collection in hybrid polymer/TiO₂ solar cells using poly(ethylenedioxythiophene) polystyrene sulphonate as hole collector -: art. no. 143101

  , APPLIED PHYSICS LETTERS, Vol: 86, ISSN: 0003-6951
  • Author Web Link
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  • Citations: 88
• Journal article
  Ravirajan P, Haque SA, Durrant JR, Bradley DDC, Nelson Jet al., 2005,

  The effect of polymer optoelectronic properties on the performance of multilayer hybrid polymer/TiO₂ solar cells

  , ADVANCED FUNCTIONAL MATERIALS, Vol: 15, Pages: 609-618, ISSN: 1616-301X
  • Author Web Link
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  • Citations: 159
• Conference paper
  Kim Y, Choulis SA, Nelson J, Bradley DDC, Cook S, Durrant JRet al., 2005,

  Composition and annealing effects in polythiophene/fullerene solar cells

  , International Conference on Physics, Chemistry and Engineering of Solar Cells, Publisher: SPRINGER, Pages: 1371-1376, ISSN: 0022-2461
  • Author Web Link
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  • Citations: 201
• Conference paper
  Chatten AJ, Tuladhar SM, Choulis SA, Bradley DDC, Nelson Jet al., 2005,

  Monte Carlo modelling of hole transport in MDMO-PPV: PCBM blends

  , International Conference on Physics, Chemistry and Engineering of Solar Cells, Publisher: SPRINGER, Pages: 1393-1398, ISSN: 0022-2461
  • Author Web Link
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  • Citations: 29
• Journal article
  Kim Y, Choulis SA, Nelson J, Bradley DDC, Cook S, Durrant JRet al., 2005,

  Device annealing effect in organic solar cells with blends of regioregular poly(3-hexylthiophene) and soluble fullerene

  , APPLIED PHYSICS LETTERS, Vol: 86, ISSN: 0003-6951
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  • Citations: 650
• Journal article
  Green ANM, Chandler RE, Haque SA, Nelson J, Durrant JRet al., 2005,

  Transient absorption studies and numerical modeling of iodine photoreduction by nanocrystalline TiO₂ films

  , JOURNAL OF PHYSICAL CHEMISTRY B, Vol: 109, Pages: 142-150, ISSN: 1520-6106
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  • Citations: 82
• Journal article
  Cabanillas-Gonzalez J, Virgili T, Lanzani G, Yeates S, Ariu M, Nelson J, Bradley DDCet al., 2005,

  Photophysics of charge transfer in a polyfluorene/violanthrone blend

  , PHYSICAL REVIEW B, Vol: 71, ISSN: 2469-9950
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  • Citations: 22
• Conference paper
  Kim Y, Cook S, Choulis SA, Nelson J, Durrant JRet al., 2005,

  Effect of electron transport polymer addition to polymer/fullerene blend solar cells

  , Proceedings ICSM 2004, Wollongong, Australia, July 2004
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• Journal article
  Corkish R, Kettemann S, Nelson J, 2005,

  Special issue - guest editors

  , Physica E - Low-Dimensional Systems & Nanostructures, Vol: 14, Pages: 1-288, ISSN: 1386-9477
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• Journal article
  Khodabakhsh S, Poplavskyy D, Heutz S, Nelson J, Bradley DDC, Murata F, Jones TSet al., 2004,

  Using self-assembling dipole molecules to improve hole injection in conjugated polymers

  , ADVANCED FUNCTIONAL MATERIALS, Vol: 14, Pages: 1205-1210, ISSN: 1616-301X
  • Author Web Link
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  • Citations: 145
• Journal article
  Pacios R, Nelson J, Bradley DDC, Virgili T, Lanzani G, Brabec CJet al., 2004,

  Ultrafast spectroscopic studies in polyfluorene:: [6,6]-phenyl C₆₁-butyric acid methyl ester blend films:: monitoring the photoinduced charge transfer process

  , JOURNAL OF PHYSICS-CONDENSED MATTER, Vol: 16, Pages: 8105-8116, ISSN: 0953-8984
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  • Citations: 13
• Journal article
  Kim Y, Cook S, Choulis SA, Nelson J, Durrant JR, Bradley DDCet al., 2004,

  Organic photovoltaic devices based on blends of regioregular poly(3-hexylthiophene) and poly(9.9-dioctylfluorene<i>-co</i>-benzothiadiazole)

  , CHEMISTRY OF MATERIALS, Vol: 16, Pages: 4812-4818, ISSN: 0897-4756
  • Author Web Link
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  • Citations: 223
• Journal article
  Choulis SA, Kim Y, Nelson J, Bradley DDC, Giles M, Shkunov M, McCulloch Iet al., 2004,

  High ambipolar and balanced carrier mobility in regioregular poly(3-hexylthiophene)

  , APPLIED PHYSICS LETTERS, Vol: 85, Pages: 3890-3892, ISSN: 0003-6951
  • Author Web Link
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  • Citations: 193
• Journal article
  Nelson J, Chandler RE, 2004,

  Random walk models of charge transfer and transport in dye sensitized systems

  , COORDINATION CHEMISTRY REVIEWS, Vol: 248, Pages: 1181-1194, ISSN: 0010-8545
  • Author Web Link
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  • Citations: 289
• Journal article
  Nelson J, Kirkpatrick J, 2004,

  Analysis of the photovoltaic efficiency of a molecular solar cell based on a two-level system

  , APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, Vol: 79, Pages: 15-20, ISSN: 0947-8396
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  • Citations: 8
• Journal article
  Clifford JN, Palomares E, Nazeeruddin MK, Grätzel M, Nelson J, Li X, Long NJ, Durrant JRet al., 2004,

  Molecular control of recombination dynamics in dye-sensitized nanocrystalline TiO₂ films:: Free energy vs distance dependence

  , JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 126, Pages: 5225-5233, ISSN: 0002-7863
  • Author Web Link
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  • Citations: 302
• Conference paper
  Poplavskyy D, Nelson J, Bradley DDC, 2004,

  Dispersive and non-dispersive hole transport in fluorene-arylamine copolymers

  , 9th International Conference on Electrical and Related Properties of Organic Solids, Publisher: WILEY-V C H VERLAG GMBH, Pages: 415-420, ISSN: 1022-1360
  • Author Web Link
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  • Citations: 15
• Conference paper
  Nelson J, Choulis SA, Durrant JR, 2004,

  Charge recombination in polymer/fullerene photovoltaic devices

  , Symposium on Thin Film and Nano-Structured Materials for Photovoltaics, Publisher: ELSEVIER SCIENCE SA, Pages: 508-514, ISSN: 0040-6090
  • Author Web Link
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  • Citations: 50
• Conference paper
  Ravirajan P, Haque SA, Poplavskyy D, Durrant JR, Bradley DDC, Nelson Jet al., 2004,

  Nanoporous TiO₂ solar cells sensitised with a fluorene-thiophene copolymer

  , Symposium on Thin Film and Nano-Structured Materials for Photovoltaics, Publisher: ELSEVIER SCIENCE SA, Pages: 624-629, ISSN: 0040-6090
  • Author Web Link
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  • Citations: 47
• Journal article
  Ravirajan P, Haque SA, Durrant JR, Poplavskyy D, Bradley DDC, Nelson Jet al., 2004,

  Hybrid nanocrystalline TiO₂ solar cells with a fluorene-thiophene copolymer as a sensitizer and hole conductor

  , JOURNAL OF APPLIED PHYSICS, Vol: 95, Pages: 1473-1480, ISSN: 0021-8979
  • Author Web Link
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  • Citations: 137
• Journal article
  Nelson J, Kirkpatrick J, Ravirajan P, 2004,

  Factors limiting the efficiency of molecular photovoltaic devices

  , PHYSICAL REVIEW B, Vol: 69, ISSN: 2469-9950
  • Author Web Link
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  • Citations: 170
• Conference paper
  Choulis SA, Nelson J, Tuladhar SM, Cook S, Kim Y, Durrant JR, Bradley DDCet al., 2004,

  Transport and recombination dynamics studies of polymer/fullerene based solar cells

  , 15th European Symposium on Polymer Spectroscopy (ESOPS 15), Publisher: WILEY-V C H VERLAG GMBH, Pages: 1-7, ISSN: 1022-1360
  • Author Web Link
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  • Citations: 4
• Conference paper
  Poplavskyy D, Nelson J, Bradley DDC, 2004,

  Ohmic hole injection into a polyfluorene homopolymer

  , Bellingham, Conference on organic light-emitting materials and devices VII, San Diego, CA, 4 - 6 August 2003, Publisher: SPIE - International Society for Optical Engineering, Pages: 197-206
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• Conference paper
  Chatten AJ, Tuladhar S, Bradley DDC, Nelson Jet al., 2004,

  Modelling hole transport in conjugated polymers for solar cell applications

  , Proceedings 19th European photovoltaic solar energy conference and exhibition, Paris, France, June 2004
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• Conference paper
  Pacios R, Nelson J, Durrant JR, Bradley DDC, Westerling M, Osterbacka R, Brabec CJ, Pacios R, Nelson J, Durrant JR, Bradley DDC, Westerling M, Osterbacka R, Brabec CJet al., 2004,

  Charge recombination studies in polyfluorene :[6,6]-Phenyl (C61)- butyric acid methyl ester blend photovoltaic cells

  , Bellingham, Conference on organic photovoltaics IV, San Diego, CA, 7 - 8 August 2003, Publisher: SPIE - International Society for Optical Engineering, Pages: 262-270
  • Cite

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