https://scholars.lib.ntu.edu.tw/handle/123456789/559054
標題: | Exciplex-forming derivatives of 2,7-di-tert-butyl-9,9-dimethylacridan and benzotrifluoride for efficient OLEDs | 作者: | Keruckiene, R. Guzauskas, M. Narbutaitis, E. Tsiko, U. Volyniuk, D. Lee, P.-H. Chen, C.-H. Chiu, T.-L. Lin, C.-F. Grazulevicius, J.V. JIUN-HAW LEE |
關鍵字: | Acridan; Exciplex; OLED; Room temperature phosphorescence; Thermally activated delayed fluorescence | 公開日期: | 2020 | 卷: | 78 | 來源出版物: | Organic Electronics | 摘要: | 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. © 2019 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85075874578&partnerID=40&md5=e5f06479f5caf4093129d366a61f18d3 https://scholars.lib.ntu.edu.tw/handle/123456789/559054 |
DOI: | 10.1016/j.orgel.2019.105576 | SDG/關鍵字: | Charge transfer; Fluorescence; Interface states; Phosphorescence; Quantum theory; Acridan; Exciplexes; OLED; Room temperature phosphorescence; Thermally activated delayed fluorescences; Organic light emitting diodes (OLED) |
顯示於: | 電機工程學系 |
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