Tuning the emissive characteristics of TADF emitters by fusing heterocycles with acridine as donors: highly efficient orange to red organic light-emitting diodes with EQE over 20%
| Autor: | Jie Gao, Weixuan Zeng, Tianheng Chen, Chen-Han Lu, Xuan Zeng, Zhanxiang Chen, Chih-Wei Huang, Shaolong Gong, Chuluo Yang, Chung-Chih Wu, Yepeng Xiang, Zhongyan Huang |
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| Rok vydání: | 2019 |
| Předmět: |
Photoluminescence
Materials science business.industry Benzothiophene 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence 0104 chemical sciences chemistry.chemical_compound chemistry Acridine Materials Chemistry OLED Optoelectronics Quantum efficiency 0210 nano-technology business |
| Zdroj: | Journal of Materials Chemistry C. 7:9087-9094 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c9tc01973a |
| Popis: | The development of highly efficient orange-red organic thermally activated delayed fluorescence (TADF) emitters is currently challenging. Herein, we reported two new emitters, namely, BTDMAc-NAI and BFDMAc-NAI with benzofuran and benzothiophene fused to the acridine frame. Inspiringly, the target emitters showed very different emissions from orange to pure red, with the emission peak of BTDMAc-NAI red-shifting to 650 nm. Meanwhile, these two emitters showed distinct TADF characteristics and high photoluminescence quantum yields (PLQYs). As a result, the orange-red OLED based on BFDMAc-NAI demonstrated an excellent performance with external quantum efficiency (EQE) beyond 20%. This work unveils the great potential of the fused polycycle molecular design in exploiting new orange-red TADF emitters for high-performance OLEDs. |
| Databáze: | OpenAIRE |
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