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Organic semiconductor spintronics: Utilising triplet excitons in organic electronics.









The Royal Society, London, 6-9 Carlton House Terrace, London, SW1Y 5AG


Scientific discussion meeting organised by Professor Andrew Monkman and Professor Sir Richard Friend FREng FRS

Image copyright: Professor F Castellano

Event details

Organic electronics now supports a rapidly growing industry, including organic light-emitting diode, OLED, displays as used in cell phone displays and up-market TVs.  This has been enabled both by successful engineering of materials and devices, and also, through the design of new device architectures that allow control of electron spin.  This is a rapidly moving field, and some recent advances in the basic semiconductor science are likely to enable new applications.

This meeting will focus on the role of the spin state of the bound electron-hole pairs (excitons) that provide light emission in LEDs or separate to give free charge in solar cells.  It is centred on two recent developments.  Using materials engineered to reduce the spin exchange energy, spin triplet excitons can be harnessed for efficient light generation in LEDs.  Conversely, large exchange energies can allow splitting of singlet excitons to pairs of spin-entangled triplet excitons that can be harnessed in solar cell architectures that may exceed the single-junction Shockley-Queisser limit.

View the draft meeting programme

Biographies of the organisers and speakers will be made available shortly. The recorded audio of the presentations can be found below, and the papers relating to the meeting have been published in Philosophical Transactions A.

Attending this event

This event is intended for researchers in relevant fields and is free to attend. There are a limited number of places and registration is essential. An optional lunch is offered and should be booked during registration (all major credit cards accepted).

Enquiries: Contact the events team

Event organisers

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Schedule of talks


15 talks Show detail Hide detail

SF and triplet charge generation

Dr Akshay Rao, University of Cambridge, UK

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Triplet fusion and triplet harvesting

Professor Dr Anna Köhler, University of Bayreuth, Germany

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Multiple Exciton Generation in Quantum Dots, QD Arrays, and Via Molecular Singlet Fission: Applications to Solar Photon Conversion

Professor Arthur J Nozik, University of Colorado and NREL, USA

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High-efficiency organic light-emitting diodes with fluorescent emitters via TADF process

Professor Chihaya Adachi, Kyushu University, Japan

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Triplet-triplet annihilation: another route to 100% efficient fluorescent OLEDs?

Dr Denis Kondakov, DuPont OLEDs, USA

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Photophysics of TADF materials

Dr Fernando Dias, University of Durham, UK

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Spin pumping into organic semiconductors

Professor Henning Sirringhaus FRS, University of Cambridge, UK

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Triplet excitons in organic solar cells: charge recombination, oxygen quenching and photodegradation

Professor James Durrant, Imperial College, UK

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Singlet exciton fission

Professor Marc Baldo, MIT, USA

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Singlet-to-triplet conversion utilizing hyperfine as well as ferromagnetic fringe fields

Dr Markus Wohlgenannt, University of Iowa, USA

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Photochemical up-conversion

Professor Felix N Castellano, North Carolina State University, USA

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Theory of intersystem crossing in organic emitters

Professor Dr Reinder Coehoorn, Philips Research Laboratories, The Netherlands

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Excitons for OLEDs: You can’t live with them and you can’t operate without them

Professor Stephen Forrest, University of Michigan, USA

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Utilising triplet excitons in OLEDs - a hot exciton path

Professor Yuguang Ma, South China University of Technology, China

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Optical and magnetic properties of triplet excitons in Pt-rich pi-conjugated polymers

Professor Z Valy Vardeny, University of Utah, USA

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Organic semiconductor spintronics: Utilising triplet excitons in organic electronics. The Royal Society, London 6-9 Carlton House Terrace London SW1Y 5AG UK