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Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
Published on: October 24, 2017
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Boron-based donor-spiro-acceptor compounds exhibiting thermally activated delayed fluorescence (TADF)
Marco Stanoppi1, Andreas Lorbach
1Universität Konstanz, Fachbereich Chemie, Universitätsstr. 10, 78464 Konstanz, Germany. andreas.lorbach@uni-konstanz.de.
Dalton Transactions (Cambridge, England : 2003)
|May 9, 2018
Summary
New boron-based compounds exhibit tunable solid-state photoluminescence and microsecond emission lifetimes, indicating potential for thermally activated delayed fluorescence (TADF) applications.
Area of Science:
- Materials Science
- Organic Chemistry
- Photophysics
Background:
- Organic light-emitting diodes (OLEDs) require efficient emissive materials.
- Thermally activated delayed fluorescence (TADF) offers a pathway to high internal quantum efficiencies.
- Boron-containing compounds are emerging as promising candidates for optoelectronic applications.
Purpose of the Study:
- To synthesize and characterize novel boron-based donor-spiro-acceptor compounds.
- To investigate the photophysical properties, including solid-state emission and lifetimes.
- To explore the potential of these compounds for TADF applications.
Main Methods:
- Synthesis of four distinct boron-based donor-spiro-acceptor molecules.
- Photoluminescence spectroscopy to analyze emission spectra and quantum yields.
- Time-resolved emission spectroscopy to determine excited-state lifetimes.
Main Results:
- Intense solid-state photoluminescence was observed for all synthesized compounds.
- Emission characteristics were tunable by modifying the donor moieties.
- Microsecond-scale emission lifetimes were measured, consistent with TADF behavior.
Conclusions:
- The studied boron-based donor-spiro-acceptor compounds demonstrate efficient solid-state emission.
- Tunable photoluminescence and long emission lifetimes suggest their suitability for TADF-based devices.
- These findings contribute to the development of advanced organic electronic materials.
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