Integrating TADF luminogens with AIE characteristics using a novel acridine–carbazole hybrid as donor for high-performance and low efficiency roll-off OLEDs
| Autor: | Shaofeng Ye, Qing Zhang, Lei Wang, Shuaiqiang Sun, Yaxiong Wang, Wei Liu, Shaoqing Zhuang, Panpan Leng, Xialei Lv, Hongting Chen |
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| Rok vydání: | 2019 |
| Předmět: |
Photoluminescence
Materials science Carbazole Quantum yield 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Acceptor 0104 chemical sciences chemistry.chemical_compound chemistry Acridine Materials Chemistry OLED Quantum efficiency 0210 nano-technology Triazine |
| Zdroj: | Journal of Materials Chemistry C. 7:9487-9495 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c9tc01329f |
| Popis: | A novel acridine–carbazole hybrid donor (34AcCz: 13,13-dimethyl-8-phenyl-8,13-dihydro-5H-indolo[3,2-a]acridine) was formed from two sophisticated donors of dimethyl acridine (DMAc) and carbazole (Cz). Based on this novel donor and the acceptors of pyrimidine and triazine, two new luminogens with both prominent TADF and AIE properties, namely, 5-(4-(2,6-diphenylpyrimidin-4-yl)phenyl)-13,13-dimethyl-8-phenyl-8,13-dihydro-5H-indolo[3,2-a]acridine (34AcCz-PM) and 5-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-13,13-dimethyl-8-phenyl-8,13-dihydro-5H-indolo[3,2-a]acridine (34AcCz-Trz), have been designed and synthesized. AIE characteristics in TADF emitters can be regulated by the selection of acceptor species, then 34AcCz-PM realized a higher photoluminescence quantum yield (PLQY) than that of 34AcCz-Trz. Finally, the maximum current efficiency (CEmax)/external quantum efficiency (EQEmax) of 73.3 cd A−1/22.6% for the doped OLEDs of 34AcCz-PM was demonstrated, which remained at 65.5 cd A−1/20.1% even at a high luminance of 5000 cd m−2. A highly efficient nondoped OLED based on 34AcCz-PM was also obtained, providing maximum EL efficiencies of 45.2 cd A−1/14.1%. |
| Databáze: | OpenAIRE |
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