期刊
ACS CENTRAL SCIENCE
卷 3, 期 7, 页码 769-777出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscentsci.7b00183
关键词
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资金
- JST ERATO,Japan [JPMJER1305]
- Kyushu University Platform of Inter/Transdisciplinary Energy Research
- young researcher/doctor student support program
- Grants-in-Aid for Scientific Research [16K17972] Funding Source: KAKEN
Thermally activated delayed fluorescence (TADF) [GRAPHIC] materials have shown great potential for highly efficient organic light-emitting diodes (OLEDs). While the current molecular design of TADF materials primarily focuses on combining donor and acceptor units, we present a novel system based on the use of excited-state intramolecular proton transfer (ESIPT) to achieve efficient TADF without relying on the well-established donor-acceptor scheme. In an appropriately designed acridone-based compound with intramolecular hydrogen bonding, ESIPT leads to separation of the highest occupied and lowest unoccupied molecular orbitals, resulting in TADF emission with a photoluminescence quantum yield of nearly 60%. High external electroluminescence quantum efficiencies of up to 14% in OLEDs using this emitter prove that efficient triplet harvesting is possible with ESIPT-based TADF materials. This work will expand and accelerate the development of a wide variety of TADF materials for high performance OLEDs.
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