Exciplex-forming derivatives of 2,7-di-tert-butyl-9,9-dimethylacridan and benzotrifluoride for efficient OLEDs
| Autor: | Edgaras Narbutaitis, Chia-Hsun Chen, Tien-Lung Chiu, Chi-Feng Lin, Rasa Keruckiene, Pei-Hsi Lee, Matas Guzauskas, Jiun-Haw Lee, Juozas V. Grazulevicius, Dmytro Volyniuk, Uliana Tsiko |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Trifluoromethyl 02 engineering and technology General Chemistry Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Excimer Photochemistry 01 natural sciences Fluorescence 0104 chemical sciences Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound chemistry Materials Chemistry OLED Molecule Electrical and Electronic Engineering 0210 nano-technology Benzene Phosphorescence |
| Zdroj: | Organic Electronics. 78:105576 |
| ISSN: | 1566-1199 |
| Popis: | Strongly medium dependent capability to exhibit not only prompt/delayed thermally-activated fluorescence but also aggregation-induced phosphorescence or exciplex emission is demonstrated either for solutions or for solid samples of acridan-based luminophores. Multicolour emissions of different nature were detected and studied for donor-acceptor derivatives of 2- or 4-(trifluoromethyl)benzene and 2,7-di-tert-butyl-9,9-dimethylacridine containing trifluoromethyl groups in ortho and para positions. For the demonstration of one of possible applications, both compounds were tested in the emissive layers of exciplex-based OLEDs. In the best case, their high maximum current, power and external quantum efficiences of 29.5 cd/A, 29.1 lm/W and 8.2% respectively were achieved for the device based on exciplex electroluminescence resulting from recombination of intermolecular charge transfer states formed on the interface of electron-donating and electron-accepting molecules used. |
| Databáze: | OpenAIRE |
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