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Highly Efficient Solution-Processed Bluish-Green Thermally Activated Delayed Fluorescence Compounds Using Di(pyridin-3-yl)methanone as Acceptor.
- Source :
- Photonics; Apr2023, Vol. 10 Issue 4, p456, 9p
- Publication Year :
- 2023
-
Abstract
- Solution-processed devices with thermally activated delayed fluorescence (TADF) compounds have gained great attention due to their low cost and high performance. Here, two solution-processable TADF emitters named ACCz-DPyM and POxCz-DPyM were synthesized by coupled 9,10-dihydro-9,9-dimethylacridine or phenoxazine modified carbazole as donor with di(pyridin-3-yl)methanone as acceptor. Both TADF compounds show same small ΔΕ<subscript>ST</subscript> of 0.04 eV and high PLQY of 66.2% and 58.2%. The devices fabricated by ACCz-DPyM and POxCz-DPyM as emitters show excellent performance as solution-processed with low turn-on voltage of 4.0 and 3.4 V, high luminance of 6209 and 3248 cd m<superscript>−2</superscript> at 8 V, the maximum current efficiency of 9.9 and 15.9 cd A<superscript>−1</superscript>, the maximum external quantum efficiency of 6.6% and 6.5% and low efficiency roll-off. The solution-processed device based on ACCz-DPyM shows bluish-green emission. These results show that ACCz-DPyM and POxCz-DPyM are suitable for solution processing devices. [ABSTRACT FROM AUTHOR]
- Subjects :
- DELAYED fluorescence
PHOTOCATHODES
QUANTUM efficiency
PHOSPHORESCENCE
Subjects
Details
- Language :
- English
- ISSN :
- 23046732
- Volume :
- 10
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Photonics
- Publication Type :
- Academic Journal
- Accession number :
- 163454802
- Full Text :
- https://doi.org/10.3390/photonics10040456