Abstract
We designed and synthesized a new organic light-emitting diode (OLED) emitter, SBABz4, containing spiro-biacridine donor (D) in the core surrounded by two benzonitrile acceptors (A). The dual A-DxD-A structure is shown to provide pure-blue emission in relation to its single A-D counterpart. Time-resolved photoluminescence (TRPL) recorded in the broad dynamic range from solutions and solid films revealed three emission components: prompt fluorescence, phosphorescence, and efficient thermally activated delayed fluorescence (TADF). The last is independently proven by temperature-dependent TRPL and oxygen-quenching PL experiment. From the PL lifetimes and quantum yield, we estimated maximum external quantum efficiency of 7.1% in SBABz4-based OLEDs and demonstrated 6.8% in a working device.
Original language | English |
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Pages (from-to) | 22796-22801 |
Number of pages | 6 |
Journal | Journal of Physical Chemistry C |
Volume | 122 |
Issue number | 39 |
DOIs | |
State | Published - Oct 4 2018 |
Bibliographical note
Publisher Copyright:© 2018 American Chemical Society.
Funding
L.G.K., A.S., and V.D. acknowledge the EU H2020 for funding through the Grant SEPOMO (Marie Skłodowska-Curie Grant Agreement 722651). S.W. acknowledges the funding from DFG FOR1809.
Funders | Funder number |
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DFG FOR1809 | FOR1809 |
SEPOMO | |
Horizon 2020 Framework Programme | 722651 |
H2020 Euratom |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- General Energy
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films