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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.

Advisor

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

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Citation