Professor Jenny Nelson

Maurano A, Shuttle CC, Hamilton R, Ballantyne AM, Nelson J, Zhang W, Heeney M, Durrant JRet al., 2011, Transient Optoelectronic Analysis of Charge Carrier Losses in a Selenophene/Fullerene Blend Solar Cell, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 115, Pages: 5947-5957, ISSN: 1932-7447

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• Citations: 152

Kirchartz T, Pieters BE, Kirkpatrick J, Rau U, Nelson Jet al., 2011, Recombination via tail states in polythiophene: fullerene solar cells, PHYSICAL REVIEW B, Vol: 83, ISSN: 1098-0121

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• Citations: 325

Voigt MM, Mackenzie RCI, Yau CP, Atienzar P, Dane J, Keivanidis PE, Bradley DDC, Nelson Jet al., 2011, Gravure printing for three subsequent solar cell layers of inverted structures on flexible substrates, SOLAR ENERGY MATERIALS AND SOLAR CELLS, Vol: 95, Pages: 731-734, ISSN: 0927-0248

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• Citations: 95

Faist MA, Keivanidis PE, Foster S, Woebkenberg PH, Anthopoulos TD, Bradley DDC, Durrant JR, Nelson Jet al., 2011, Effect of Multiple Adduct Fullerenes on Charge Generation and Transport in Photovoltaic Blends with Poly(3-hexylthiophene-2,5-diyl), JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, Vol: 49, Pages: 45-51, ISSN: 0887-6266

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• Citations: 56

Ball JM, Bouwer RKM, Kooistra FB, Frost JM, Qi Y, Domingo EB, Smith J, de Leeuw DM, Hummelen JC, Nelson J, otherset al., 2011, Soluble fullerene derivatives: The effect of electronic structure on transistor performance and air stability, Journal of Applied Physics, Vol: 110, Pages: 014506-014506

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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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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

Clarke TM, Ballantyne A, Shoaee S, Soon YW, Duffy W, Heeney M, McCulloch I, Nelson J, Durrant JRet al., 2010, Analysis of Charge Photogeneration as a Key Determinant of Photocurrent Density in Polymer: Fullerene Solar Cells, Adv. Mater., Vol: 22, Pages: 5287-5291, ISSN: 1521-4095

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Keivanidis PE, Kamm V, Dyer-Smith C, Zhang W, Laquai F, McCulloch I, Bradley DDC, Nelson Jet al., 2010, Delayed Luminescence Spectroscopy of Organic Photovoltaic Binary Blend Films: Probing the Emissive Non-geminate Charge Recombination, ADVANCED MATERIALS, Vol: 22, Pages: 5183-+, ISSN: 0935-9648

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• Citations: 24

Maurano A, Hamilton R, Shuttle CG, Ballantyne AM, Nelson J, O'Regan B, Zhang W, McCulloch I, Azimi H, Morana M, Brabec CJ, Durrant JRet al., 2010, Recombination Dynamics as a Key Determinant of Open Circuit Voltage in Organic Bulk Heterojunction Solar Cells: A Comparison of Four Different Donor Polymers, ADVANCED MATERIALS, Vol: 22, Pages: 4987-+, ISSN: 0935-9648

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• Citations: 348

Jamieson FC, Agostinelli T, Azimi H, Nelson J, Durrant JRet al., 2010, Field-Independent Charge Photogeneration in PCPDTBT/PC70BM Solar Cells, The Journal of Physical Chemistry Letters, Vol: 1, Pages: 3306-3310, ISSN: 1948-7185

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Shuttle CG, Hamilton R, O'Regan BC, Nelson J, Durrant JRet al., 2010, Charge-density-based analysis of the current-voltage response of polythiophene/fullerene photovoltaic devices, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Vol: 107, Pages: 16448-16452, ISSN: 0027-8424

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• Citations: 246

Dyer-Smith C, Reynolds LX, Bruno A, Bradley DDC, Haque SA, Nelson Jet al., 2010, Triplet Formation in Fullerene Multi-Adduct Blends for Organic Solar Cells and Its Influence on Device Performance, ADVANCED FUNCTIONAL MATERIALS, Vol: 20, Pages: 2701-2708, ISSN: 1616-301X

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• Citations: 45

Said AJ, Poize G, Martini C, Ferry D, Marine W, Giorgio S, Fages F, Hocq J, Boucle J, Nelson J, Durrant JR, Ackermann Jet al., 2010, Hybrid Bulk Heterojunction Solar Cells Based on P3HT and Porphyrin-Modified ZnO Nanorods, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 114, Pages: 11273-11278, ISSN: 1932-7447

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• Citations: 95

Clarke TM, Ballantyne AM, Tierney S, Heeney M, Duffy W, McCulloch I, Nelson J, Durrant JRet al., 2010, Charge Photogeneration in Low Band Gap Polyselenophene/Fullerene Blend Films, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 114, Pages: 8068-8075, ISSN: 1932-7447

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• Citations: 58

Hamilton R, Shuttle CG, O'Regan B, Hammant TC, Nelson J, Durrant JRet al., 2010, Recombination in Annealed and Nonannealed Polythiophene/Fullerene Solar Cells: Transient Photovoltage Studies versus Numerical Modeling, JOURNAL OF PHYSICAL CHEMISTRY LETTERS, Vol: 1, Pages: 1432-1436, ISSN: 1948-7185

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• Citations: 142

Horie M, Shen I-W, Tuladhar SM, Leventis H, Haque SA, Nelson J, Saunders BR, Turner MLet al., 2010, Poly(thienylenevinylene) prepared by ring-opening metathesis polymerization: Performance as a donor in bulk heterojunction organic photovoltaic devices, POLYMER, Vol: 51, Pages: 1541-1547, ISSN: 0032-3861

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• Citations: 23

Haque SA, Nelson J, 2010, Toward Organic All-Optical Switching, SCIENCE, Vol: 327, Pages: 1466-1467, ISSN: 0036-8075

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• Citations: 52

Shuttle CG, Hamilton R, Nelson J, O'Regan BC, Durrant JRet al., 2010, Measurement of Charge-Density Dependence of Carrier Mobility in an Organic Semiconductor Blend, ADVANCED FUNCTIONAL MATERIALS, Vol: 20, Pages: 698-702, ISSN: 1616-301X

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• Citations: 147

Woebkenberg PH, Ishwara T, Nelson J, Bradley DDC, Haque SA, Anthopoulos TDet al., 2010, TiO₂ thin-film transistors fabricated by spray pyrolysis, APPLIED PHYSICS LETTERS, Vol: 96, ISSN: 0003-6951

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• Citations: 51

Atienzar P, Ishwara T, Illy BN, Ryan MP, O'Regan BC, Durrant JR, Nelson Jet al., 2010, Control of Photocurrent Generation in Polymer/ZnO Nanorod Solar Cells by Using a Solution-Processed TiO₂ Overlayer, JOURNAL OF PHYSICAL CHEMISTRY LETTERS, Vol: 1, Pages: 708-713, ISSN: 1948-7185

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• Citations: 62

Keivanidis PE, Clarke TM, Lilliu S, Agostinelli T, Macdonald JE, Durrant JR, Bradley DDC, Nelson Jet al., 2010, Dependence of Charge Separation Efficiency on Film Microstructure in Poly(3-hexylthiophene-2,5-diyl): [6,6]-Phenyl-C₆₁ Butyric Acid Methyl Ester Blend Films, JOURNAL OF PHYSICAL CHEMISTRY LETTERS, Vol: 1, Pages: 734-738, ISSN: 1948-7185

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• Citations: 98

Ballantyne AM, Ferenczi TAM, Campoy-Quiles M, Clarke TM, Maurano A, Wong KH, Zhang W, Stingelin-Stutzmann N, Kim J-S, Bradley DDC, Durrant JR, McCulloch I, Heeney M, Nelson J, Tierney S, Duffy W, Mueller C, Smith Pet al., 2010, Understanding the Influence of Morphology on Poly(3-hexylselenothiophene):PCBM Solar Cells, MACROMOLECULES, Vol: 43, Pages: 1169-1174, ISSN: 0024-9297

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• Citations: 86

Kim Y, Cook S, Tuladhar SM, Choulis SA, Nelson J, Durrant JR, Bradley DDC, Giles M, Mc Culloch I, Ha CS, Ree Met al., 2010, A strong regioregularity effect in self-organizing conjugated polymer films and high-efficiency polythiophene: Fullerene solar cells, Materials for Sustainable Energy: A Collection of Peer-Reviewed Research and Review Articles from Nature Publishing Group, Pages: 63-69, ISBN: 9789814317641

Low-cost photovoltaic energy conversion using conjugated molecular materials has become increasingly feasible through the development of organic ‘bulk heterojunction (BHJ)’ structures1−7, where efficient light-induced charge separation is enabled by a large-area donor–acceptor interface2,3. The highest efficiencies have been achieved using blends of poly(3-hexylthiophene) (P3HT) and a fullerene derivative8–12, but performance depends critically on the material properties and processing conditions. This variability is believed to be influenced by the self-organizing properties of P3HT, which means that both optical13,14and electronic15,16properties are sensitive to the molecular packing. However, the relationship between molecular nanostructure, optoelectronic properties of the blend material and device performance has not yet been demonstrated. Here we focus on the influence of polymer regioregularity (RR) on the molecular nanostructure, and hence on the resulting material properties and device performance.We find a strong influence of RR on solar-cell performance, which can be attributed to enhanced optical absorption and transport resulting from the organization of P3HT chains and domains. Further optimization of devices using the highest RR material resulted in a power conversion efficiency of 4.4%, even without optimization of electrodes7.

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• Citations: 20

Brabec CJ, Mcculloch I, Nelson J, 2010, Determination and Control of Microstructure in Organic Photovoltaic Devices, Functional Supramolecular Architectures: For Organic Electronics and Nanotechnology, Pages: 827-860, ISBN: 9783527326112

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MacKenzie RCI, Frost JM, Nelson J, 2010, A numerical study of mobility in thin films of fullerene derivatives, The Journal of chemical physics, Vol: 132, Pages: 064904-064904

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Frost JM, Faist MA, Nelson J, 2010, Energetic disorder in higher fullerene adducts: A quantum chemical and voltammetric study, Advanced Materials, Vol: 22, Pages: 4881-4884

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Svanstrom CMB, Rysz J, Bernasik A, Budkowski A, Zhang F, Inganas O, Andersson MR, Magnusson KO, Benson-Smith JJ, Nelson J, Moons Eet al., 2009, Device Performance of APFO-3/PCBM Solar Cells with Controlled Morphology, ADVANCED MATERIALS, Vol: 21, Pages: 4398-+, ISSN: 0935-9648

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• Citations: 50

Krebs FC, Gevorgyan SA, Gholamkhass B, Holdcroft S, Schlenker C, Thompson ME, Thompson BC, Olson D, Ginley DS, Shaheen SE, Alshareef HN, Murphy JW, Youngblood WJ, Heston NC, Reynolds JR, Jia S, Laird D, Tuladhar SM, Dane JGA, Atienzar P, Nelson J, Kroon JM, Wienk MM, Janssen RAJ, Tvingstedt K, Zhang F, Andersson M, Inganas O, Lira-Cantu M, de Bettignies R, Guillerez S, Aernouts T, Cheyns D, Lutsen L, Zimmermann B, Wuerfel U, Niggemann M, Schleiermacher H-F, Liska P, Graetzel M, Lianos P, Katz EA, Lohwasser W, Jannon Bet al., 2009, A round robin study of flexible large-area roll-to-roll processed polymer solar cell modules, SOLAR ENERGY MATERIALS AND SOLAR CELLS, Vol: 93, Pages: 1968-1977, ISSN: 0927-0248

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• Citations: 190

Kim Y, Nelson J, Zhang T, Cook S, Durrant JR, Kim H, Park J, Shin M, Nam S, Heeney M, McCulloch I, Ha C-S, Bradley DDCet al., 2009, Distorted Asymmetric Cubic Nanostructure of Soluble Fullerene Crystals in Efficient Polymer:Fullerene Solar Cells, ACS NANO, Vol: 3, Pages: 2557-2562, ISSN: 1936-0851

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• Citations: 64