Professor Jenny Clark
School of Mathematical and Physical Sciences
Head of Materials and Biological Physics Research Cluster
Professor of Materials Physics
jenny.clark@sheffield.ac.uk
D16, Hicks Building
Full contact details
Professor Jenny Clark
School of Mathematical and Physical Sciences
D16
Hicks Building
Hounsfield Road
Sheffield
S3 7RH
School of Mathematical and Physical Sciences
D16
Hicks Building
Hounsfield Road
Sheffield
S3 7RH
- Profile
-
My research interests involve understanding the photophysics of carbon-based materials such as biological materials, organic semiconductors and graphene.
I do this using a variety of spectroscopic techniques. For more information see my personal webpage or contact me.
Research Experience
- 2009-2013 Royal Society Dorothy Hodgkin Fellow, Cambridge University, UK.
- 2009 Visiting Scholar, Hyderabad University, India.
- 2007-2009 Postdoctoral Research Fellow, Politecnico di Milano, Italy.
Supervisor: Prof. Guglielmo Lanzani
Fellowships and Awards
- 2014 University of Sheffield Vice-Chancellor's Fellowship (5 years).
- 2010 Charles and Catherine Darwin Research Fellowship (3 years).
- 2009 Royal Society Dorothy Hodgkin Fellowship (4 years).
- 2004 European Materials Research Society (E-MRS) student award.
- 2003 EPSRC PhD studentship and Industrial Case Award (Seiko Epson UK, 3 years).
Career Breaks
- 2012 Maternity leave (9 months)
- 2013 Maternity leave (13 months)
- Qualifications
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- 2003-2007 PhD in Physics, Cambridge University, UK. Supervisor: Prof. C. Silva.
- 1999-2003 MSci in Physics with a Year in Europe, Imperial College, London, UK. (First Class Degree)
- Research interests
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Time-resolved spectroscopy of carbon-based materials
To study organic semiconductors and biological samples, we use transient absorption and emission spectroscopy.
Transient absorption spectroscopy uses laser pulses as short as 7 femtoseconds (7 millionths of a billionth of a second) to take snapshots of the electronic and vibrational state of the molecules after they have absorbed light. By delaying the time at which the 'probe' pulse arrives to take a snapshot of the molecule, we can track the dynamics of the electrons in the molecule as a function of time.
Transient emission spectroscopy is similar, but measures the photons emitted from the sample.
We measure materials and biological samples as a function of temperature (down to 4K) and magnetic field (up to 700mT).
- Publications
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Show: Featured publications All publications
Featured publications
Journal articles
- Spin Statistics for Triplet–Triplet Annihilation Upconversion: Exchange Coupling, Intermolecular Orientation, and Reverse Intersystem Crossing. JACS Au, 1(12), 2188-2201.
- Emissive spin-0 triplet-pairs are a direct product of triplet–triplet annihilation in pentacene single crystals and anthradithiophene films. Nature Chemistry, 13(2), 163-171.
- Manipulating molecules with strong coupling: harvesting triplet excitons in organic exciton microcavities. Chemical Science, 11(2), 343-354. View this article in WRRO
- Triplet-pair states in organic semiconductors. Annual Review of Physical Chemistry, 70(1), 323-351.
- The Nature of Singlet Exciton Fission in Carotenoid Aggregates. Journal of the American Chemical Society, 137(15), 5130-5139.
- Triplet Dynamics in Pentacene Crystals: Applications to Fission-Sensitized Photovoltaics. Advanced Materials, 26(6), 919-924.
- Ultrafast Long-Range Charge Separation in Organic Semiconductor Photovoltaic Diodes. Science, 343(6170), 512-516.
All publications
Journal articles
- Intersystem crossing outcompetes triplet-pair separation from 1(TT) below 270 K in anthradithiophene films. Journal of the American Chemical Society. View this article in WRRO
- Fast, slow and reverse polymorph transformations in thin films of a 5,10-dihydroindolo[3,2-b]indole derivative. Journal of Materials Chemistry C. View this article in WRRO
- The importance of accounting for non-radiative decay when screening materials for singlet fission: the case of Pigment Red 254. Journal of Materials Chemistry C. View this article in WRRO
- Microstructure determines crystallinity-driven singlet fission efficiency in diF-TES-ADT. Scientific Reports, 15(1). View this article in WRRO
- Conjugation length dependence of intramolecular singlet fission in a series of regioregular oligo 3-alkyl(thienylene-vinylene)s. Journal of the American Chemical Society, 147(1), 662-668. View this article in WRRO
- Macrocyclic Parallel Dimer Showing Quantum Coherence of Quintet Multiexcitons at Room Temperature. Journal of the American Chemical Society, 146(37), 25527-25535.
- Radiative pumping in a strongly coupled microcavity filled with a neat molecular film showing excimer emission. Physical Chemistry Chemical Physics, 26(20), 14745-14753. View this article in WRRO
- Exploring the versatile uses of triplet states: working principles, limitations, and recent progress in phosphorescence, TADF, and TTA. ACS Applied Optical Materials, 2(12), 2476-2500. View this article in WRRO
- Singlet fission is incoherent in pristine orthorhombic single crystals of rubrene: no evidence of triplet-pair emission. Faraday Discussions, 250, 162-180. View this article in WRRO
- Twisted carotenoids do not support efficient intramolecular singlet fission in the orange carotenoid protein. The Journal of Physical Chemistry Letters, 14(26), 6135-6142. View this article in WRRO
- Author Correction: Emissive spin-0 triplet-pairs are a direct product of triplet–triplet annihilation in pentacene single crystals and anthradithiophene films. Nature Chemistry, 15(7), 1040-1040.
- Metal‐organic framework nanosheets as templates to enhance performance in semi‐crystalline organic photovoltaic cells. Advanced Science, 9(21). View this article in WRRO
- In optimized rubrene-based nanoparticle blends for photon upconversion, singlet energy collection outcompetes triplet-pair separation, not singlet fission. Journal of Materials Chemistry C, 10(12), 4684-4696. View this article in WRRO
- Spin Statistics for Triplet–Triplet Annihilation Upconversion: Exchange Coupling, Intermolecular Orientation, and Reverse Intersystem Crossing. JACS Au, 1(12), 2188-2201.
- Spin statistics for triplet-triplet annihilation upconversion: exchange coupling, intermolecular orientation and reverse intersystem crossing.
- Emissive spin-0 triplet-pairs are a direct product of triplet–triplet annihilation in pentacene single crystals and anthradithiophene films. Nature Chemistry, 13(2), 163-171.
- A Thermostable Protein Matrix for Spectroscopic Analysis of Organic Semiconductors. Journal of the American Chemical Society, 142(32), 13898-13907.
- Metal–organic framework nanosheets for enhanced performance of organic photovoltaic cells. Journal of Materials Chemistry A, 8(12), 6067-6075. View this article in WRRO
- Manipulating molecules with strong coupling: harvesting triplet excitons in organic exciton microcavities. Chemical Science, 11(2), 343-354. View this article in WRRO
- A hybrid organic–inorganic polariton LED. Light: Science & Applications, 8(1). View this article in WRRO
- Heavy-atom effects on intramolecular singlet fission in a conjugated polymer. The Journal of Chemical Physics, 151(4).
- Triplet-pair states in organic semiconductors. Annual Review of Physical Chemistry, 70(1), 323-351.
- Strong coupling in a microcavity containing β-carotene. Optics Express, 26(3), 3320-3327. View this article in WRRO
- The entangled triplet pair state in acene and heteroacene materials. Nature Communications, 8(1). View this article in WRRO
- Intermolecular states in organic dye dispersions: excimers vs aggregates. Journal of Materials Chemistry C, 33(2017), 8380-8389. View this article in WRRO
- Efficient Radiative Pumping of Polaritons in a Strongly Coupled Microcavity by a Fluorescent Molecular Dye. Advanced Optical Materials. View this article in WRRO
- Polaritons: Efficient radiative pumping of polaritons in a strongly coupled microcavity by a fluorescent molecular dye (Advanced Optical Materials 10/2016). Advanced Optical Materials, 4(10), 1614-1614. View this article in WRRO
- The Nature of Singlet Exciton Fission in Carotenoid Aggregates. Journal of the American Chemical Society, 137(15), 5130-5139.
- Humidity, light and temperature dependent characteristics of Au/N-BuHHPDI/Au surface type multifunctional sensor. Sensors and Actuators B: Chemical, 192, 565-571.
- Triplet Dynamics in Pentacene Crystals: Applications to Fission-Sensitized Photovoltaics. Advanced Materials, 26(6), 919-924.
- Ultrafast Long-Range Charge Separation in Organic Semiconductor Photovoltaic Diodes. Science, 343(6170), 512-516.
- Temperature-Independent Singlet Exciton Fission in Tetracene. Journal of the American Chemical Society, 135(44), 16680-16688.
- Activated Singlet Exciton Fission in a Semiconducting Polymer. Journal of the American Chemical Society, 135(34), 12747-12754.
- Control of Intrachain Charge Transfer in Model Systems for Block Copolymer Photovoltaic Materials. Journal of the American Chemical Society, 135(13), 5074-5083.
- Femtosecond torsional relaxation. Nature Physics, 8(3), 225-231.
- Giant broadband nonlinear optical absorption response in dispersed graphene single sheets. Nature Photonics, 5(9), 554-560.
- Ultrafast Dynamics of Exciton Fission in Polycrystalline Pentacene. Journal of the American Chemical Society, 133(31), 11830-11833.
- Two-Photon Poly(phenylenevinylene) DFB Laser. Chemistry of Materials, 23(3), 805-809.
- Stimulated emission and ultrafast optical switching in a ter(9,9′‐spirobifluorene)‐co‐methylmethacrylate copolymer. Journal of Polymer Science Part B: Polymer Physics, 49(1), 52-61.
- Organic photonics for communications. Nature Photonics, 4(7), 438-446.
- Gain and ultrafast optical switching in PMMA optical fibers and films doped with luminescent conjugated polymers and oligomers. Frontiers of Optoelectronics in China, 3(1), 45-53.
- Femtosecond laser fabrication of microfluidic channels for organic photonic devices. Applied Optics, 48(31), G114-G114.
- Determining exciton bandwidth and film microstructure in polythiophene films using linear absorption spectroscopy. Applied Physics Letters, 94(16).
- Determining exciton coherence from the photoluminescence spectral line shape in poly(3-hexylthiophene) thin films. The Journal of Chemical Physics, 130(7).
- Ultrafast optofluidic gain switch based on conjugated polymer in femtosecond laser fabricated microchannels. Applied Physics Letters, 94(4).
- Charge recombination in distributed heterostructures of semiconductor discotic and polymeric materials.. Journal of Applied Physics, 103(12).
- Blue polymer optical fiber amplifiers based on conjugated fluorene oligomers. Journal of Nanophotonics, 2(1), 023504-023504.
- Excitonic organic materials for photochemical and optoelectronic applications: general discussion. Faraday Discussions, 250, 298-334.
- Conjugation-length dependence of regioregular oligo 3-alkyl(thienylene-vinylene)s demonstrates polyene-like behaviour with weak electron–electron correlations. Physical Chemistry Chemical Physics, 25(16), 11205-11215.
- Ultrafast optical gain switch in organic photonic devices. J. Mater. Chem., 20(3), 519-523.
- Role of Intermolecular Coupling in the Photophysics of Disordered Organic Semiconductors: Aggregate Emission in Regioregular Polythiophene. Physical Review Letters, 98(20).
- Molecular-weight dependence of interchain polaron delocalization and exciton bandwidth in high-mobility conjugated polymers. Physical Review B, 74(11).
Book chapters
- Pump-push-probe transient spectroscopy of isolated conjugated oligomers, Springer Series in Chemical Physics (pp. 463-465). Springer Berlin Heidelberg
Conference proceedings
- A tale of two triplets: manipulating and harvesting triplet pairs with strong light-matter coupling (Conference Presentation). Physical Chemistry of Semiconductor Materials and Interfaces XVII (pp 28-28), 19 August 2018 - 23 August 2018.
- Ultrafast Long-Range Charge Separation in Organic Semiconductor Photovoltaic Diodes. 19th International Conference on Ultrafast Phenomena (pp 07.Mon.C.7-07.Mon.C.7), 2014.
- Plastic optical fibres dopants to obtain gain enlargement and ultrafast optical switching. SPIE Proceedings, Vol. 8001 (pp 800147-800147)
- Chip cracks during assembly: Finding and eliminating the critical defect. 2011 IEEE 61st Electronic Components and Technology Conference (ECTC) (pp 509-516), 31 May 2011 - 3 June 2011.
- Investigation of Local Dynamics on the Sub-micron Scale in Organic Blends Using an Ultrafast Confocal Microscope. MRS Proceedings, Vol. 1270
- Nanoscale Imaging of the Interface Dynamics in Polymer Blends by Femtosecond Pump‐Probe Confocal Microscopy. Advanced Materials, Vol. 22(28) (pp 3048-3051)
- Use of wafer backside inspection and SPR to address systemic tool and process issues. SPIE Proceedings, Vol. 7638 (pp 763818-763818)
- Nanoscale Imaging of the Interface Dynamics in Polymer Blends by Femtosecond Pump-Probe Confocal Microscopy. International Conference on Ultrafast Phenomena (pp FA3-FA3), 2010.
- Organic optofluidic devices produced by femtosecond laser micromachining. 2009 International Symposium on Optomechatronic Technologies (pp 414-418), 21 September 2009 - 23 September 2009.
- Polymer-based Optofluidic devices in microchannels fabricated by femtosecond laser irradiation and chemical etching (FLICE). 2009 3rd ICTON Mediterranean Winter Conference (ICTON-MW) (pp 1-1), 10 December 2009 - 12 December 2009.
- Ultrafast confocal microscope for time-resolved imaging of thin films. CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference (pp 1-1), 14 June 2009 - 19 June 2009.
- Microfluidic channels fabricated by femtosecond laser irradiation and chemical etching for optofluidic devices.. CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference (pp 1-1), 14 June 2009 - 19 June 2009.
- Ultrafast Confocal Microscope for Functional Imaging of Organic Thin Films (pp 161-165)
- Ultrafast Confocal Microscope for Functional Imaging of Organic Thin Films. Conference on Lasers and Electro-Optics/International Quantum Electronics Conference (pp CME3-CME3), 2009.
- Ultrafast confocal microscope for time-resolved imaging of thin films. Optics Infobase Conference Papers
- Microfluidic channels fabricated by femtosecond laser irradiation and chemical etching for optofluidic devices. Optics Infobase Conference Papers
- Organic optofluidic devices produced by femtosecond laser micromachining. ISOT: 2009 INTERNATIONAL SYMPOSIUM ON OPTOMECHATRONIC TECHNOLOGIES (pp 404-408)
- Polyfluorene-PMMA copolymers for plastic optical fibers with gain. SPIE Proceedings, Vol. 6999 (pp 69990M-69990M)
- Ultrafast Photonics in Polymers. Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing (pp LWC2-LWC2), 2008.
- Ultrafast photonics in polymers. Optics InfoBase Conference Papers
- Ultrafast resonant optical switching in organic materials doped in matrix. Materials Research Society Symposium Proceedings, Vol. 1003 (pp 142-146)
Preprints
- A Macrocyclic Parallel Dimer Showing Quantum Coherence of Quintet Multiexcitons at Room Temperature, American Chemical Society (ACS).
- Twisted carotenoids do not support efficient intramolecular singlet fission in the orange carotenoid protein, arXiv.
- Spin statistics for triplet-triplet annihilation upconversion: exchange coupling, intermolecular orientation and reverse intersystem crossing, American Chemical Society (ACS).
- Band-edge Excitation of Carotenoids Removes S* Revealing Triplet-pair
Contributions to the S1 Absorption Spectrum.
- Manipulating matter with strong coupling: harvesting triplet excitons in organic exciton microcavities, arXiv.
- Spin Statistics for Triplet–Triplet Annihilation Upconversion: Exchange Coupling, Intermolecular Orientation, and Reverse Intersystem Crossing. JACS Au, 1(12), 2188-2201.