Decoupling Charge Transport and Electroluminescence in a High Mobility Polymer Semiconductor.
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Peer-reviewed
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Abstract
Fluorescence enhancement of a high-mobility polymer semiconductor is achieved via energy transfer to a higher fluorescence quantum yield squaraine dye molecule on 50 ps timescales. In organic light-emitting diodes, an order of magnitude enhancement of the external quantum efficiency is observed without reduction in the charge-carrier mobility resulting in radiances of up to 5 W str(-1) m(-2) at 800 nm.
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Keywords
NIR, energy transfer, fluorescence, organic LEDs
Journal Title
Adv Mater
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Journal ISSN
0935-9648
1521-4095
1521-4095
Volume Title
28
Publisher
Wiley
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Sponsorship
EPSRC (via Imperial College London) (PHES_G01401)
Engineering and Physical Sciences Research Council (EP/M005143/1)
Engineering and Physical Sciences Research Council (EP/M005143/1)
We gratefully acknowledge funding from the Engineering and Physical Sciences Research Council (EPSRC) through a programme grant EP/M005143/1. We would like to thank the Doctoral Training Centre in Plastic Electronics EP/G037515/1. K. B. acknowledges financial support by the Deutsche Forschungsgemeinschaft (BR-4869/1-1). The group at Würzburg would like to acknowledge support from the Deutsche Forschungsgemeinschaft (DFG Research Unit FOR 1809) and from the SolTech Initiative of the Bavarian State Ministry of Science, Research and the Arts. D. H. and K.B. would like to thank Dr. Jiři Novak and Jakub Rozbořil (Central European Institute of Technology, Masaryk University, Czech Republic) and Dr. Tom Arnold (Diamond Light Source, Didcot, UK) for assistance during the synchrotron experiment and Diamond Light Source, Didcot, UK for financial support.