A solution-processable near-infrared thermally activated delayed fluorescent dye with a fused aromatic acceptor and aggregation induced emission behavior
A solution-processable near-infrared thermally activated delayed fluorescent dye with a fused aromatic acceptor and aggregation induced emission behavior
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DOI：
10.1039/d1tc04753a
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发表时间：
2022-01-07
影响因子：
6.4
通讯作者：
Bronstein, Hugo
中科院分区：
文献类型：
--
作者：
Congrave, Daniel G.;Drummond, Bluebell H.;Bronstein, Hugo
一种高效且可加工的近红外热激活延迟荧光（NIR TADF）染料所提供的独特协同特性可能会在整个研究领域产生变革性影响。在此，展示了可溶液加工的NIR TADF材料（CAT-TPE）。良好的溶解性是通过使用一种新的四苯乙烯（TPE）为基础的三苯胺电子供体。TADF确认通过变温时间分辨测量在842 nm的峰值光致发光（PL）波长的溶液处理的膜。报道了用于溶液处理的NIR TADF器件的具有良好滚降特性的OLED，其电致发光λ（max）> 700 nm。CAT-TPE还表现出典型的聚集诱导发射（AIE）行为，当聚集时比在溶液中发射更多，所有PL > 700 nm。这项工作打开了大门，大大提高了结构多样性的解决方案可加工的近红外TADF，并将告知未来的高效率AIE近红外TADF材料的设计。
The unique synergy of properties offered by an efficient and processable near-infrared thermally activated delayed fluorescent (NIR TADF) dye could be transformative across research fields. Here, a solution-processable NIR TADF material is demonstrated (CAT-TPE). Good solubility is achieved through the use of a new tetraphenylethylene (TPE)-based triphenylamine electron donor. TADF is confirmed through variable temperature time-resolved measurements at a peak photoluminescence (PL) wavelength of 842 nm in a solution-processed film. An OLED with good roll-off characteristics for a solution-processed NIR TADF device is reported with electroluminescence lambda(max) > 700 nm. CAT-TPE also demonstrates classic aggregation induced emission (AIE) behavior, being more emissive when aggregated than in solution with all PL > 700 nm. This work opens the door to the considerably enhanced structural diversity of solution-processable NIR TADF and will inform the design of future high efficiency AIE NIR TADF materials.