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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Komiyama, Hideaki Park, In Seob Yasuda, Takuma |
| Copyright Year | 2017 |
| Abstract | Deep-blue emitters that can harvest both singlet and triplet excited states to give high electron-to-photon conversion efficiencies are highly desired for applications in full-color displays and white lighting devices based on organic light-emitting diodes (OLEDs). Thermally activated delayed fluorescence (TADF) molecules based on highly twisted donor–acceptor (D–A) configurations are promising emitting dopants for the construction of efficient deep-blue OLEDs. In this study, a simple and versatile D–A system combining acridan-based donors and pyrimidine-based acceptors has been developed as a new platform for high-efficiency deep-blue TADF emitters. The designed pre-twisted acridan–pyrimidine D–A molecules exhibit small singlet–triplet energy splitting and high photoluminescence quantum yields, functioning as efficient deep-blue TADF emitters. The OLEDs utilizing these TADF emitters display bright blue electroluminescence with external quantum efficiencies of up to 20.4%, maximum current efficiencies of 41.7 cd A−1, maximum power efficiencies of 37.2 lm W−1, and color coordinates of (0.16, 0.23). The design strategy featuring such acridan–pyrimidine D–A motifs can offer great prospects for further developing high-performance deep-blue TADF emitters and TADF-OLEDs. |
| Starting Page | 953 |
| Ending Page | 960 |
| Page Count | 8 |
| File Format | HTM / HTML PDF |
| ISSN | 20416520 |
| Volume Number | 8 |
| Issue Number | 2 |
| Journal | Chemical Science |
| DOI | 10.1039/c6sc03793c |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Subscribed |
| Subject Keyword | Bright Blue Photoluminescence Fluorescence Electroluminescence |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry |
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