Imperial College London

ProfessorMartinHeeney

Faculty of Natural SciencesDepartment of Chemistry

Professor of Organic Materials
 
 
 
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Contact

 

+44 (0)20 7594 1248m.heeney Website

 
 
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Location

 

401GMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Publication Type
Year
to

296 results found

Himmelberger S, Vandewal K, Fei Z, Heeney M, Salleo Aet al., 2014, Role of Molecular Weight Distribution on Charge Transport in Semiconducting Polymers, MACROMOLECULES, Vol: 47, Pages: 7151-7157, ISSN: 0024-9297

Journal article

Yaacobi-Gross N, Treat ND, Pattanasattayavong P, Faber H, Perumal AK, Stingelin N, Bradley DDC, Stavrinou PN, Heeney M, Anthopoulos TDet al., 2014, High-Efficiency Organic Photovoltaic Cells Based on the Solution-Processable Hole Transporting Interlayer Copper Thiocyanate (CuSCN) as a Replacement for PEDOT:PSS, Advanced Energy Materials, Vol: 5, ISSN: 1614-6840

The use of copper thiocyanate (CuSCN) as a universal solution-processable and highly transparent hole-transporting layer in organic bulk-heterojunction photo­voltaic cells is demonstrated. When CuSCN is employed as a replacement for the commonly used poly(3,4-ethyl­­enedioxythiophene):polystyrenesulfonate (PEDOT:PSS), organic solar cells with maximum power conversion efficiency of 8%, are realized; this value is 1.27 times higher than that for optimized control cells based on PEDOT:PSS.

Journal article

Kesava SV, Fei Z, Rimshaw AD, Wang C, Hexemer A, Asbury JB, Heeney M, Gomez EDet al., 2014, Domain Compositions and Fullerene Aggregation Govern Charge Photogeneration in Polymer/Fullerene Solar Cells, ADVANCED ENERGY MATERIALS, Vol: 4, ISSN: 1614-6832

Journal article

Kim JS, Fei Z, Wood S, James DT, Sim M, Cho K, Heeney M, Kim J-Set al., 2014, Germanium- and Silicon-Substituted Donor–Acceptor Type Copolymers: Effect of the Bridging Heteroatom on Molecular Packing and Photovoltaic Device Performance, Advanced Energy Materials

The effects of heteroatom substitution from a silicon atom to a germanium atom in donor-acceptor type low band gap copolymers, poly[(4,4′-bis(2-ethylhexyl)dithieno[3,2-b:2′,3′-d]silole)-2,6-diyl-alt-(2,1,3-benzothiadiazole)-4,7-diyl] (PSiBTBT) and poly[(4,4′-bis(2-ethylhexyl)dithieno[3,2-b:2′,3′-d]germole)-2,6-diyl-alt-(2,1,3-benzothiadiazole)-4,7-diyl] (PGeBTBT), are studied. The optoelectronic and charge transport properties of these polymers are investigated with a particular focus on their use for organic photovoltaic (OPV) devices in blends with phenyl-C70-butyric acid methyl ester (PC70BM). It is found that the longer C-Ge bond length, in comparison to C-Si, modifies the molecular conformation and leads to a more planar chain conformation in PGeBTBT than PSiBTBT. This increase in molecular planarity leads to enhanced crystallinity and an increased preference for a face-on backbone orientation, thus leading to higher charge carrier mobility in the diode configuration. These results provide important insight into the impact of the heavy atom substitution on the molecular packing and device performance of polymers based on the poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b]-dithiophene)-alt-4,7-(2,1,3-benzothiadiazole) (PCPDTBT) backbone.

Journal article

Dattani R, Bannock JH, Fei Z, MacKenzie RCI, Guilbert AAY, Vezie MS, Nelson J, de Mello JC, Heeney M, Cabral JT, Nedoma AJet al., 2014, A general mechanism for controlling thin film structures in all-conjugated block copolymer: fullerene blends, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 2, Pages: 14711-14719, ISSN: 2050-7488

Journal article

Bannock JH, Krishnadasan SH, Heeney M, de Mello JCet al., 2014, A gentle introduction to the noble art of flow chemistry, MATERIALS HORIZONS, Vol: 1, Pages: 373-378, ISSN: 2051-6347

Journal article

Taroni PJ, Hoces I, Stingelin N, Heeney M, Bilotti Eet al., 2014, Thermoelectric Materials: A Brief Historical Survey from Metal Junctions and Inorganic Semiconductors to Organic Polymers, ISRAEL JOURNAL OF CHEMISTRY, Vol: 54, Pages: 534-552, ISSN: 0021-2148

Journal article

Marsh HS, Reid OG, Barnes G, Heeney M, Stingelin N, Rumbles Get al., 2014, Control of Polythiophene Film Microstructure and Charge Carrier Dynamics Through Crystallization Temperature, JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, Vol: 52, Pages: 700-707, ISSN: 0887-6266

Journal article

Casey A, Ashraf RS, Fei Z, Heeney Met al., 2014, Thioalkyl-Substituted Benzothiadiazole Acceptors: Copolymerization with Carbazole Affords Polymers with Large Stokes Shifts and High Solar Cell Voltages, MACROMOLECULES, Vol: 47, Pages: 2279-2288, ISSN: 0024-9297

Journal article

Soon YW, Shoaee S, Ashraf RS, Bronstein H, Schroeder BC, Zhang W, Fei Z, Heeney M, McCulloch I, Durrant JRet al., 2014, Material Crystallinity as a Determinant of Triplet Dynamics and Oxygen Quenching in Donor Polymers for Organic Photovoltaic Devices, ADVANCED FUNCTIONAL MATERIALS, Vol: 24, Pages: 1474-1482, ISSN: 1616-301X

Journal article

Buchaca-Domingo E, Ferguson AJ, Jamieson FC, McCarthy-Ward T, Shoaee S, Tumbleston JR, Reid OG, Yu L, Madec M-B, Pfannmoeller M, Hermerschmidt F, Schroeder RR, Watkins SE, Kopidakis N, Portale G, Amassian A, Heeney M, Ade H, Rumbles G, Durrant JR, Stingelin Net al., 2014, Additive-assisted supramolecular manipulation of polymer:fullerene blend phase morphologies and its influence on photophysical processes, MATERIALS HORIZONS, Vol: 1, Pages: 270-279, ISSN: 2051-6347

Journal article

Yau CP, Fei Z, Ashraf RS, Shahid M, Watkins SE, Pattanasattayavong P, Anthopoulos TD, Gregoriou VG, Chochos CL, Heeney Met al., 2014, Influence of the Electron Deficient Co-Monomer on the Optoelectronic Properties and Photovoltaic Performance of Dithienogermole-based Co-Polymers, ADVANCED FUNCTIONAL MATERIALS, Vol: 24, Pages: 678-687, ISSN: 1616-301X

Journal article

Marshall J, Schroeder BC, Bronstein H, Meager I, Rossbauer S, Yaacobi-Gross N, Buchaca-Domingo E, Anthopoulos TD, Stingelin N, Beavis P, Heeney Met al., 2014, Benzocarborano[2,1-b:3,4-b ']dithiophene Containing Conjugated Polymers: Synthesis, Characterization, and Optoelectronic Properties, MACROMOLECULES, Vol: 47, Pages: 89-96, ISSN: 0024-9297

Journal article

Marshall J, Hooton J, Han Y, Creamer A, Ashraf RS, Porte Y, Anthopoulos TD, Stavrinou PN, McLachlan MA, Bronstein H, Beavis P, Heeney Met al., 2014, Polythiophenes with vinylene linked ortho, meta and para-carborane sidechains, POLYMER CHEMISTRY, Vol: 5, Pages: 6190-6199, ISSN: 1759-9954

Journal article

Scarongella M, Paraecattil AA, Buchaca-Domingo E, Douglas JD, Beaupre S, McCarthy-Ward T, Heeney M, Moser J-E, Leclerc M, Frechet JMJ, Stingelin N, Banerji Net al., 2014, The influence of microstructure on charge separation dynamics in organic bulk heterojunction materials for solar cell applications, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 2, Pages: 6218-6230, ISSN: 2050-7488

Journal article

Marshall J, Fei Z, Yau CP, Yaacobi-Gross N, Rossbauer S, Anthopoulos TD, Watkins SE, Beavis P, Heeney Met al., 2014, Incorporation of benzocarborane into conjugated polymer systems: synthesis, characterisation and optoelectronic properties, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 2, Pages: 232-239, ISSN: 2050-7526

Journal article

Bannock JH, Al-Hashimi M, Krishnadasan SH, Halls JJM, Heeney M, de Mello JCet al., 2014, Controlled synthesis of conjugated random copolymers in a droplet-based microreactor, Materials Horizons

Journal article

Koch FPV, Rivnay J, Foster S, Mueller C, Downing JM, Buchaca-Domingo E, Westacott P, Yu L, Yuan M, Baklar M, Fei Z, Luscombe C, McLachlan MA, Heeney M, Rumbles G, Silva C, Salleo A, Nelson J, Smith P, Stingelin Net al., 2013, The impact of molecular weight on microstructure and charge transport in semicrystalline polymer Semiconductors poly(3-hexylthiophene), a model study, PROGRESS IN POLYMER SCIENCE, Vol: 38, Pages: 1978-1989, ISSN: 0079-6700

Journal article

Koch FPV, Heeney M, Smith P, 2013, Thermal and Structural Characteristics of Oligo(3-hexylthiophene)s (3HT)(n), n=4-36, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 135, Pages: 13699-13709, ISSN: 0002-7863

Journal article

Koch FPV, Smith P, Heeney M, 2013, "Fibonacci's Route" to Regioregular Oligo(3-hexylthiophene)s, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 135, Pages: 13695-13698, ISSN: 0002-7863

Journal article

Musser AJ, Al-Hashimi M, Maiuri M, Brida D, Heeney M, Cerullo G, Friend RH, Clark Jet al., 2013, Activated Singlet Exciton Fission in a Semiconducting Polymer, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 135, Pages: 12747-12754, ISSN: 0002-7863

Journal article

Mei Y, Loth MA, Payne M, Zhang W, Smith J, Day CS, Parkin SR, Heeney M, McCulloch I, Anthopoulos TD, Anthony JE, Jurchescu ODet al., 2013, High Mobility Field-Effect Transistors with Versatile Processing from a Small-Molecule Organic Semiconductor, ADVANCED MATERIALS, Vol: 25, Pages: 4352-4357, ISSN: 0935-9648

Journal article

Meager I, Ashraf RS, Rossbauer S, Bronstein H, Donaghey JE, Marshall J, Schroeder BC, Heeney M, Anthopoulos TD, McCulloch Iet al., 2013, Alkyl Chain Extension as a Route to Novel Thieno[3,2-b]thiophene Flanked Diketopyrrolopyrrole Polymers for Use in Organic Solar Cells and Field Effect Transistors, MACROMOLECULES, Vol: 46, Pages: 5961-5967, ISSN: 0024-9297

Journal article

Heeney MJ, Al-Raqa SA, Auger A, Burnham PM, Cammidge AN, Chambrier I, Cook MJet al., 2013, Routes to some 3,6-disubstituted phthalonitriles and examples of phthalocyanines derived therefrom. An overview, JOURNAL OF PORPHYRINS AND PHTHALOCYANINES, Vol: 17, Pages: 649-664, ISSN: 1088-4246

Journal article

Zhang X, Bronstein H, Kronemeijer AJ, Smith J, Kim Y, Kline RJ, Richter LJ, Anthopoulos TD, Sirringhaus H, Song K, Heeney M, Zhang W, McCulloch I, DeLongchamp DMet al., 2013, Molecular origin of high field-effect mobility in an indacenodithiophene-benzothiadiazole copolymer, NATURE COMMUNICATIONS, Vol: 4, ISSN: 2041-1723

Journal article

Lee MJ, Chen Z, di Pietro R, Heeney M, Sirringhaus Het al., 2013, Electrooptical Spectroscopy of Uniaxially Aligned Polythiophene Films in Field-Effect Transistors, CHEMISTRY OF MATERIALS, Vol: 25, Pages: 2075-2082, ISSN: 0897-4756

Journal article

Nuccio L, Willis M, Schulz L, Fratini S, Messina F, D'Amico M, Pratt FL, Lord JS, McKenzie I, Loth M, Purushothaman B, Anthony J, Heeney M, Wilson RM, Hernandez I, Cannas M, Sedlak K, Kreouzis T, Gillin WP, Bernhard C, Drew AJet al., 2013, Importance of Spin-Orbit Interaction for the Electron Spin Relaxation in Organic Semiconductors, PHYSICAL REVIEW LETTERS, Vol: 110, ISSN: 0031-9007

Journal article

Tsoi WC, Zhang W, Hollis JR, Suh M, Heeney M, McCulloch I, Kim J-Set al., 2013, In-situ monitoring of molecular vibrations of two organic semiconductors in photovoltaic blends and their impact on thin film morphology, Applied Physics Letters, Vol: 102, ISSN: 1077-3118

We report in-situ simultaneous monitoring of molecular vibrations of two components in organic photovoltaic blends using resonant Raman spectroscopy. Blend films were composed of a low bandgap copolymer thieno[3,2-b]thiophene-diketopyrrolopyrrole (DPPTTT) and (6,6)-phenyl-C71-butyric acid ester (PC 70BM). Changes in Raman spectra associated with crystallization processes of each component and their impact on thin film morphology were studied during thermal annealing and cooling processes. Transition temperatures to crystalline phases in blends were measured at ∼150 °C and ∼170 °C for DPPTTT and PC 70BM, respectively. Such phase changes lead to modifications in local chemical composition reducing relative Raman peak intensities (IPC70BM/IDPPTTT) from ∼0.4 in PC 70BM-rich domains to ∼0.15 in homogeneous areas.

Journal article

Himmelberger S, Dacuna J, Rivnay J, Jimison LH, McCarthy-Ward T, Heeney M, McCulloch I, Toney MF, Salleo Aet al., 2013, Effects of Confinement on Microstructure and Charge Transport in High Performance Semicrystalline Polymer Semiconductors, ADVANCED FUNCTIONAL MATERIALS, Vol: 23, Pages: 2091-2098, ISSN: 1616-301X

Journal article

Marshall J, Heeney MJ, Beavis P, 2013, Development of fully conjugated polymers containing benzocarborane, 245th National Spring Meeting of the American-Chemical-Society (ACS), Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727

Conference paper

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