Journal
NATURE COMMUNICATIONS
Volume 10, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-019-10277-y
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Funding
- Engineering and Physical Sciences Research Council (EPSRC) [EP/M005143/1]
- EPSRC
- Cambridge Commonwealth Trust
- Doctoral Training Centre in Plastic Electronics [EP/G037515/1]
- European Commission through a Marie-Curie Individual Fellowship [747461]
- Belgian National Science Foundation
- F.R.S.-FNRS
- F.R.S.-FNRS [2.5020.11]
- Walloon Region [n1117545]
- European Union's Horizon 2020 research and innovation program [646176]
- European Commission/Region Wallonne (FEDER-BIORGEL project)
- Marie Curie Actions (MSCA) [747461] Funding Source: Marie Curie Actions (MSCA)
- EPSRC [EP/R031894/1, EP/M005143/1] Funding Source: UKRI
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Efficient conjugated polymer optoelectronic devices benefit from concomitantly high luminescence and high charge carrier mobility. This is difficult to achieve, as interchain interactions, which are needed to ensure efficient charge transport, tend also to reduce radiative recombination and lead to solid-state quenching effects. Many studies detail strategies for reducing these interactions to increase luminescence, or modifying chain packing motifs to improve percolation charge transport; however achieving these properties together has proved elusive. Here, we show that properly designed amorphous donor-alt-acceptor conjugated polymers can circumvent this problem; combining a tuneable energy gap, fast radiative recombination rates and luminescence quantum efficiencies >15% with high carrier mobilities exceeding 2.4 cm(2)/Vs. We use photoluminescence from exciton states pinned to close-crossing points to study the interplay between mobility and luminescence. These materials show promise towards realising advanced optoelectronic devices based on conjugated polymers, including electrically-driven polymer lasers.
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