Boosting photoluminescence quantum yields of triarylboron/phenoxazine hybrids via incorporation of cyano groups and their applications as TADF emitters for high-performance solution-processed OLEDs
| Autor: | Tao Zhou, Jie Yu, Kailong Wu, Guohua Xie, Minrong Zhu, Hong Huang, Chuluo Yang, Yuan Liu |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Photoluminescence business.industry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence 0104 chemical sciences Solution processed chemistry.chemical_compound chemistry Materials Chemistry OLED Optoelectronics 0210 nano-technology business Quantum Phenoxazine Diode |
| Zdroj: | Journal of Materials Chemistry C. 7:4778-4783 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c9tc00538b |
| Popis: | Cyano groups were introduced into the triarylboron/phenoxazine hybrids, and the resulting emitters not only exhibited distinct thermally activated delayed fluorescence (TADF) characteristics but also achieved a remarkable improvement in the photoluminescence quantum yields (PLQYs). The PLQYs of TB-1PXZ2CN and TB-2PXZ1CN are 0.67 and 0.75, which are 5.6 and 1.6 times higher than those of the respective non-cyano counterparts. Employing the two TADF emitters in solution-processed organic light-emitting diodes external quantum efficiencies (EQEs) of 9.7% and 11.4%, respectively, were achieved. Notably, the EQEs remained as high as 8.9% and 10.2% at a luminance of 2000 cd m−2 with slight efficiency roll-offs of 8% and 11%, respectively. |
| Databáze: | OpenAIRE |
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