Imperial College London

ProfessorThomasAnthopoulos

Faculty of Natural SciencesDepartment of Physics

Visiting Professor
 
 
 
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Contact

 

+44 (0)20 7594 6669thomas.anthopoulos Website

 
 
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Assistant

 

Mrs Carolyn Dale +44 (0)20 7594 7579

 
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Location

 

1111Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

315 results found

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-co-benzothiadiazole Copolymers for High Performance Solar Cells or Transistors via Alkyl Chain Optimization, MACROMOLECULES, Vol: 44, Pages: 6649-6652, ISSN: 0024-9297

Journal article

Goetz KP, Li Z, Ward JW, Bougher C, Rivnay J, Smith J, Conrad BR, Parkin SR, Anthopoulos TD, Salleo A, Anthony JE, Jurchescu ODet al., 2011, Effect of Acene Length on Electronic Properties in 5-, 6-, and 7-Ringed Heteroacenes, ADVANCED MATERIALS, Vol: 23, Pages: 3698-+, ISSN: 0935-9648

Journal article

Labram JG, Kirkpatrick J, Bradley DDC, Anthopoulos TDet al., 2011, Measurement of the diffusivity of fullerenes in polymers using bilayer organic field effect transistors, PRB, Vol: 84

Journal article

Al-Hashimi M, Baklar MA, Colleaux F, Watkins SE, Anthopoulos TD, Stingelin N, Heeney Met al., 2011, Synthesis, Characterization, and Field Effect Transistor Properties of Regioregular Poly(3-alkyl-2,5-selenylenevinylene), MACROMOLECULES, Vol: 44, Pages: 5194-5199, ISSN: 0024-9297

Journal article

Agostinelli T, Lilliu S, Labram JG, Campoy-Quiles M, Hampton M, Pires E, Rawle J, Bikondoa O, Bradley DDC, Anthopoulos TD, Nelson J, Macdonald JEet al., 2011, Real-Time Investigation of Crystallization and Phase-Segregation Dynamics in P3HT:PCBM Solar Cells During Thermal Annealing, Adv. Funct. Mater., Vol: 21, Pages: 1701-1708, ISSN: 1616-3028

Journal article

Woebkenberg PH, Eda G, Leem D-S, de Mello JC, Bradley DDC, Chhowalla M, Anthopoulos TDet al., 2011, Reduced Graphene Oxide Electrodes for Large Area Organic Electronics, ADVANCED MATERIALS, Vol: 23, Pages: 1558-1562, ISSN: 0935-9648

Journal article

Adamopoulos G, Stuart T, Bradley DDC, McLachlan MA, Anthopoulos TDet al., 2011, High-mobility low-voltage ZnO transistors based on ZrO2 high-kdielectric grown by spray pyrolysis in ambient air, Advanced Materials, 2011, Vol: 23

Journal article

Adamopoulos G, Thomas S, Bradley DDC, McLachlan MA, Anthopoulos TDet al., 2011, Low-voltage ZnO thin-film transistors based on Y2O3 and Al2O3 high-kdielectrics deposited by spray pyrolysis in air, Applied Physics letters, 2011, Vol: 98

We report the application of ambient spray pyrolysis for the deposition of high-k polycrystalline Y2O3 and amorphous Al2O3 dielectrics and their use in low-voltage ZnO thin-film transistors. The films are studied by means of atomic force microscopy, UV-visible absorption spectroscopy, impedance spectroscopy, and field-effect measurements. ZnO transistors based on spray pyrolysed Y2O3 and Al2O3 dielectrics show low leakage currents, low voltage 6 V , and hysteresis-free operation with a maximum electron mobility of 34 cm2 / V s and current on/off ratio on the order of 105. This work is a significant step toward high-performance oxide electronics manufactured using simple and scalable processing methods

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-b]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

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

Journal article

Adamopoulos G, Bashir A, Gillin WP, Georgakopoulos S, Shkunov M, Baklar MA, Stingelin N, Bradley DDC, Anthopoulos TDet al., 2011, Structural and Electrical Characterization of ZnO Films Grown by Spray Pyrolysis and Their Application in Thin-Film Transistors, ADVANCED FUNCTIONAL MATERIALS, Vol: 21, Pages: 525-531, ISSN: 1616-301X

Journal article

Labram JG, Domingo EB, Stingelin N, Bradley DDC, Anthopoulos TDet al., 2011, In-Situ Monitoring of the Solid-State Microstructure Evolution of Polymer:Fullerene Blend Films Using Field-Effect Transistors, Adv. Funct. Mater., Vol: 21, Pages: 356-363, ISSN: 1616-3028

Journal article

Fei Z, Kim JS, Smith J, Domingo EB, Anthopoulos TD, Stingelin N, Watkins SE, Kim J-S, Heeney Met al., 2011, A low band gap co-polymer of dithienogermole and 2,1,3-benzothiadiazole by Suzuki polycondensation and its application in transistor and photovoltaic cells, JOURNAL OF MATERIALS CHEMISTRY, Vol: 21, Pages: 16257-16263, ISSN: 0959-9428

Journal article

Eda G, Ball J, Mattevi C, Acik M, Artiglia L, Granozzi G, Chabal Y, Anthopoulos TD, Chhowalla Met al., 2011, Partially oxidized graphene as a precursor to graphene, JOURNAL OF MATERIALS CHEMISTRY, Vol: 21, Pages: 11217-11223, ISSN: 0959-9428

Journal article

Colleaux F, Ball JM, Woebkenberg PH, Hotchkiss PJ, Marder SR, Anthopoulos TDet al., 2011, Bias-stress effects in organic field-effect transistors based on self-assembled monolayer nanodielectrics, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 13, Pages: 14387-14393, ISSN: 1463-9076

Journal article

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

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

Journal article

Dalgleish S, Labram JG, Li Z, Wang J, McNeill CR, Anthopoulos TD, Greenham NC, Robertson Net al., 2011, Indole-substituted nickel dithiolene complexes in electronic and optoelectronic devices, Journal of Materials Chemistry, Vol: 21, Pages: 15422-15430, ISSN: 0959-9428

The synthesis and full characterisation of a novel indole-substituted nickel dithiolene [Ni(mi-5edt)2] (3) is reported, and compared to its alkyl-substituted analogue [Ni(mi-5hdt)2] (4) that has been previously communicated [Dalgleish et al., Chem. Commun., 2009, 5826] [mi-5edt = 1-(N-methylindol-5-yl)-ethene-1,2-dithiolate; mi-5hdt = 1-(N-methylindol-5-yl)-hex-1-ene-1,2-dithiolate)]. Both complexes are shown to undergo oxidative electropolymerisation, yielding polymer films that retain the redox and optical properties of the monomer. The more soluble analogue 4 is shown to form high quality thin films by spin coating, which have been utilised to fabricate field-effect transistors (FETs) and bulk heterojunction photovoltaic devices (BHJ-PVs). From FET studies, the material shows ambipolar charge transport behaviour, with a maximum carrier mobility of [similar]10-6 cm2 V-1 s-1 for electrons. By using 4 simultaneously as the electron acceptor as well as a NIR sensitiser in BHJ-PVs, the complex is shown to contribute to the photocurrent, extending light harvesting into the NIR region.

Journal article

McEntee GJ, Vilela F, Skabara PJ, Anthopoulos TD, Labram JG, Tierney S, Harrington RW, Clegg Wet al., 2011, Self-assembly and charge transport properties of a benzobisthiazole end-capped with dihexyl thienothiophene units, Journal of Materials Chemistry, Vol: 21, Pages: 2091-2097, ISSN: 0959-9428

The synthesis of a new conjugated material is reported; BDHTT-BBT features a central electron-deficient benzobisthiazole capped with two 3,6-dihexyl-thieno[3,2-b]thiophenes. Cyclic voltammetry was used to determine the HOMO (-5.7 eV) and LUMO (-2.9 eV) levels. The solid-state properties of the compound were investigated by X-ray diffraction on single-crystal and thin-film samples. OFETs were constructed with vacuum deposited films of BDHTT-BBT. The films displayed phase transitions over a range of temperatures and the morphology of the films affected the charge transport properties of the films. The maximum hole mobility observed from bottom-contact, top-gate devices was 3 [times] 10-3 cm2 V-1 s-1, with an on/off ratio of 104-105 and a threshold voltage of -42 V. The morphological and self-assembly characteristics versus electronic properties are discussed for future improvement of OFET devices.

Journal article

Schroeder BC, Nielsen CB, Kim YJ, Smith J, Huang Z, Durrant J, Watkins SE, Song K, Anthopoulos TD, McCulloch Iet al., 2011, Benzotrithiophene Co-polymers with High Charge Carrier Mobilities in Field-Effect Transistors, Chemistry of Materials, Vol: 23, Pages: 4025-4031, ISSN: 0897-4756

Journal article

Keyworth CW, Chan KL, Labram JG, Anthopoulos TD, Watkins SE, McKiernan M, White AJP, Holmes AB, Williams CKet al., 2011, The tuning of the energy levels of dibenzosilole copolymers and applications in organic electronics, Journal of Materials Chemistry, Vol: 21, Pages: 11800-11814, ISSN: 0959-9428

An understanding of the structure-function relationships of conjugated polymers is an invaluable resource for the successful design of new materials for use in organic electronics. To this end, we report the synthesis, characterisation and optoelectronic properties of a range of new alternating copolymers of dibenzosilole. Suzuki polycondensation reactions were used to afford a series of eight conjugated materials by the respective combination of either a 3,6- or 2,7-linked 9,9-dioctyldibenzosilole with 3,6-linked-N-octylcarbazole, triarylamine, oxadiazole and triazole monomers. The copolymers were fully characterised using 1H, 13C{1H} NMR spectroscopy, size exclusion chromatography (SEC), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The photophysical properties were determined using UV-Vis spectroscopy, photoluminescence (PL) measurements, cyclic voltammetry (CV) and photoelectron emission spectroscopy in air (PESA). The spectroscopic and electrochemical measurements were used to determine the materials' HOMO and LUMO energies and the values were correlated with the copolymer composition and structure. A selection of the copolymers (P4, P5 and P8) were evaluated as the active layer within single-layer polymer light emitting diodes (PLEDs), with the configuration: glass/ITO/PEDOT:PSS/emissive layer/Ba/Al, which gave low intensity electroluminescence. The selected copolymers were also evaluated as the organic semiconductor in bottom-gate, bottom-contact organic field effect transistors (OFETs). The best performing devices gave a maximum mobility of 3 [times] 10-4 cm2 V-1 s-1 and on/off current ratios of 105.

Journal article

Donaghey JE, Ashraf RS, Kim Y, Huang ZG, Nielsen CB, Zhang W, Schroeder B, Grenier CRG, Brown CT, D'Angelo P, Smith J, Watkins S, Song K, Anthopoulos TD, Durrant JR, Williams CK, McCulloch Iet al., 2011, Pyrroloindacenodithiophene containing polymers for organic field effect transistors and organic photovoltaics, Journal of Materials Chemistry, Vol: 21, Pages: 18744-18752, ISSN: 0959-9428

The synthesis of the novel electron-rich pyrroloindacenodithiophene (NIDT) unit is reported. Stille copolymerization of the distannylated NIDT unit, with the electron-deficient dibrominated benzothiadiazole (BT), difluorobenzothiadiazole (ffBT), thienopyrrolodione (TPD) and 1,1[prime or minute]-bithienopyrrolodione (biTPD) units afforded a series of low band gap semiconducting polymers. Initial testing shows promise for the use of these materials as p-type semiconductors in organic field effect transistors (OFETs) with mobilities as high as 0.07 cm2V-1s-1 being measured. These materials have also been tested as the donor polymer in polymer/fullerene bulk heterojunction organic photovoltaics (OPVs) giving maximum efficiencies of 2.5%.

Journal article

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

Journal article

Al-Hashimi M, Labram JG, Watkins S, Motevalli M, Anthopoulos TD, Heeney Met al., 2010, Synthesis and Characterization of Fused Pyrrolo[3,2-d:4,5-d′]bisthiazole-Containing Polymers, Organic Letters, Vol: 12, Pages: 5478-5481, ISSN: 1523-7060

Journal article

Kim YM, Credgingtom DJN, Labram JG, Anthopoulos TD, Durrant JRet al., 2010, Combining vacuum deposited with solution processed layers in organic solar cell, Pages: 693-695

Heterojunction cells are the subject of much current research. They can be differentiated by their production processes: solution processing and vacuum processing. Both production processes have advantages and disadvantages. Solution processed devices have the advantages of monodisperity and simple synthesis, but the use of solution processing is limited to soluble conjugated polymers due to their ability to form a smooth film on spin coated materials and the devices are characterised by lower mobilities due to their disordered structures. Vacuum processing can lead to relatively high throughput and sequential stacking of well-defined layers and extraction of exciton diffusion lengths can be performed. Vacuum processed devices, however, tend to suffer from lower efficiencies. Our approach is based on combining vacuum deposited active layers with solution processed layers in organic photovoltaic cells using pentacene and buckminsterfullerene.

Conference paper

Adamopoulos G, Bashir A, Thomas S, Gillin WP, Georgakopoulos S, Shkunov M, Baklar MA, Stingelin N, Maher RC, Cohen LF, Bradley DDC, Anthopoulos TDet al., 2010, Spray-Deposited Li-Doped ZnO Transistors with Electron Mobility Exceeding 50 cm(2)/Vs, ADVANCED MATERIALS, Vol: 22, Pages: 4764-+, ISSN: 0935-9648

Journal article

Baklar MA, Koch F, Kumar A, Domingo EB, Campoy-Quiles M, Feldman K, Yu L, Wobkenberg P, Ball J, Wilson RM, McCulloch I, Kreouzis T, Heeney M, Anthopoulos T, Smith P, Stingelin Net al., 2010, Solid-State Processing of Organic Semiconductors, ADVANCED MATERIALS, Vol: 22, Pages: 3942-+, ISSN: 0935-9648

Journal article

Gelinck G, Heremans P, Nomoto K, Anthopoulos TDet al., 2010, Organic Transistors in Optical Displays and Microelectronic Applications, ADVANCED MATERIALS, Vol: 22, Pages: 3778-3798, ISSN: 0935-9648

Journal article

Anant P, Lucas NT, Ball JM, Anthopoulos TD, Jacob Jet al., 2010, Synthesis and characterization of pyrene-centered oligothiophenes, SYNTHETIC METALS, Vol: 160, Pages: 1987-1993, ISSN: 0379-6779

Journal article

Smith J, Bashir A, Adamopoulos G, Anthony JE, Bradley DDC, Hamilton R, Heeney M, McCulloch I, Anthopoulos TDet al., 2010, Air-Stable Solution-Processed Hybrid Transistors with Hole and Electron Mobilities Exceeding 2 cm(2) V-1 s(-1), ADVANCED MATERIALS, Vol: 22, Pages: 3598-+, ISSN: 0935-9648

Journal article

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