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Highly efficient blue organic light-emitting diodes from pyrimidine-based thermally activated delayed fluorescence emitters
| Content Provider | Semantic Scholar |
|---|---|
| Author | Li, Bowen Li, Zhiyi Hu, Taiping Zhang, Yong Wang, Ying Yi, Yuanping Guo, Fengyun Zhao, Liancheng |
| Copyright Year | 2018 |
| Abstract | Three highly efficient blue thermally activated delayed fluorescence (TADF) emitters, 2SPAc-HPM, 2SPAc-MPM and 2SPAc-PPM, have been synthesised based on pyrimidine (PM), 2-methylpyrimidine (MPM) and 2-phenylpyrimidine (PPM) as the acceptor and 10H-spiro[acridan-9,9′-fluorene] (2SPAc) as the donor moiety. With their appropriate molecular design, these emitters successfully achieve small singlet–triplet splitting energies for efficient reverse intersystem crossing, and exhibit high photoluminescence quantum yields. As a result, TADF OLEDs based on 2SPAc-HPM, 2SPAc-MPM and 2SPAc-PPM emit blue light peaking at 479–489 nm and generate very high external quantum efficiencies of 25.56%, 24.34% and 31.45%, respectively. The 2SPAc-PPM-based TADF OLED is also one of the very few blue TADF emitters with an external quantum efficiency of more than 30%, and it has the best OLED performance among the pyrimidine-based TADF emitters. |
| Starting Page | 2351 |
| Ending Page | 2359 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C7TC05746F |
| Volume Number | 6 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c7/tc/c7tc05746f/c7tc05746f1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C7TC05746F |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
