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Efficient Triplet Exciton Fusion in Molecularly Doped Polymer Light‐Emitting Diodes
Author(s) -
Di Dawei,
Yang Le,
Richter Johannes M.,
Meraldi Lorenzo,
Altamimi Rashid M.,
Alyamani Ahmed Y.,
Credgington Dan,
Musselman Kevin P.,
MacManusDriscoll Judith L.,
Friend Richard H.
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201605987
Subject(s) - materials science , rubrene , oled , photon upconversion , perylene , optoelectronics , quantum yield , doping , electroluminescence , photochemistry , pentacene , diode , polymer , tetracene , anthracene , molecule , fluorescence , nanotechnology , optics , chemistry , organic chemistry , physics , layer (electronics) , composite material , thin film transistor
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.