Efficient Triplet Exciton Fusion in Molecularly Doped Polymer Light-Emitting Diodes
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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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Dawei Di, Le Yang, Johannes M. Richter, Lorenzo Meraldi, Rashid M. Altamimi, Ahmed Y. Alyamani, Dan Credgington, Kevin P. Musselman, Judith L. MacManus-Driscoll, Richard H. Friend (2017). Efficient Triplet Exciton Fusion in Molecularly Doped Polymer Light-Emitting Diodes. UWSpace. http://hdl.handle.net/10012/13250
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