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| Type |
Poster Presentation |
| Area |
Organic Chemistry |
| Room No. |
Event Hall |
| Time |
4월 19일 (목요일) 11:00~12:30 |
| Code |
ORGN.P-506 |
| Subject |
Development of Blue Thermally Activated Delayed Fluorescence Emitters Using a D-A Structure with a Bridging m-Xylyl Group |
| Authors |
Youngnam Lee, JONG-IN HONG*
Division of Chemistry, Seoul National University, Korea
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| Abstract |
The development of organic light emitting diodes (OLEDs) for display devices has attracted significant attention over the past decade. In recent years, thermally activated delayed fluorescence (TADF) has attracted a lot of interest because TADF enables ultimate internal quantum efficiency (IQE) through reverse intersystem crossing (RISC) from the triplet state (T1) to the singlet state (S1). Nonetheless, in contrast to red and green emitters, blue emitters require a wide band gap, so only a few examples of blue TADF emitters have been reported. Herein, we report new donor-Bridge-acceptor blue TADF emitters using triphenylamine as an electron donor and quinoxaline (1)/quinazoline (2) as electron acceptors along with a bridging m-xylyl group. These two emitters showed blue fluorescence with the emission maxima near 450 nm in solution and film. The transient photoluminescence (PL) clearly showed both prompt PL and delayed PL, confirming that the emitters are able to harvest both singlet and triplet states. Details of synthesis, photophysical properties and device data will be presented. |
| E-mail |
youngnam0305@snu.ac.kr |
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121st General Meeting of the KCS