Efficient Triplet Exciton Fusion in Molecularly Doped Polymer Light-Emitting Diodes
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Date
2017-04-04
Authors
Di, Dawei
Yang, Le
Richter, Johannes M.
Meraldi, Lorenzo
Altamimi, Rashid M.
Alyamani, Ahmed Y.
Credgington, Dan
Musselman, Kevin P.
MacManus-Driscoll, Judith L.
Friend, Richard H.
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley
Abstract
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.
Description
Keywords
Photon-Up-Conversion, Organic Electroluminescent Devices, Low-Power, Annihilation, Singlet, State, Photosensitizers, Photooxidation, Nanoparticles, Fluorescence