Journal
ADVANCED MATERIALS
Volume 29, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201605987
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Funding
- Department of Physics (University of Cambridge)
- KACST-Cambridge University Joint Centre of Excellence
- Singapore Agency for Science, Technology and Research (A*STAR)
- Engineering and Physical Sciences Research Council (EPSRC)
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Solution-processed polymer organic light-emitting diodes (OLEDs) doped with triplet-triplet annihilation (TTA)upconversion molecules, including 9,10-diphenylanthracene, perylene, rubrene and TIPS-pentacene, are reported. The fraction of triplet-generated electroluminescence approaches the theoretical limit. Record-high efficiencies in solution-processed OLEDs based on these materials are achieved. Unprecedented solid-state TTA-upconversion quantum yield of 23% (TTA-upconversion reaction efficiency of 70%) at electrical excitation well below one-sun equivalent is observed.
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