publication . Article . Other literature type . 2018 . Embargo end date: 15 Jan 2019

Contribution of TADF and exciplex emission for efficient “warm-white” OLEDs

Vladyslav Cherpak; Pavlo Turyk; Dmytro Volyniuk; Khrystyna Ivaniuk; Zenon Hotra; Zenon Hotra; Gintautas Bagdziunas; Hans Ågren; Hans Ågren; Pavlo Stakhira; ...
Open Access English
  • Published: 01 Jan 2018
Abstract
The bicarbazole derivative 4,4′-(9 ,9′ -[3,3′-bicarbazole]-9,9′-diyl)bis(3-(trifluoromethyl)benzonitrile), denoted as CNBCz CF <sub>3</sub> , was synthesized and tested for white OLED applications. CNBCz CF <sub>3</sub> demonstrated an extremely small value of the singlet–triplet energy gap that caused intensive thermally activated delayed fluorescence (TADF). In addition, this compound is able to form exciplex-type excited states at the interface with star-shaped 4,4′,4′′-tris[phenyl( -tolyl)amino]triphenylamine ( -MTDATA). Combining the TADF emission of CNBCz CF <sub>3</sub> with the exciplex emission from the CNBCz CF <sub>3</sub> / -MTDATA interface, we fabr...
Subjects
free text keywords: Aromatic compounds ; Electroluminescence ; Fluorescence ; Interface states, Light-Emitting-Diodes, Activated Delayed Fluorescence, Highly Efficient, Host Material, Derivatives, Carbazole, Electroluminescence, Enhancement, Conversion, Mechanism, Materials Chemistry, Materialkemi, General Chemistry, Excimer, Trifluoromethyl, chemistry.chemical_compound, chemistry, Solid-state chemistry, Photochemistry, OLED, Benzonitrile, Materials science
Funded by
EC| PHEBE
Project
PHEBE
New paradigms for high efficiency blue emitters for white OLEDS
  • Funder: European Commission (EC)
  • Project Code: 641725
  • Funding stream: H2020 | RIA
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