Braveenth Ramanaskanda, Chai Kyu Yun
Division of Bio-Nanochemistry, College of Natural Sciences, Wonkwang University, Iksan City 570-749, Chonbuk, Korea.
Materials (Basel). 2019 Aug 20;12(16):2646. doi: 10.3390/ma12162646.
High-efficiency thermally activated delayed fluorescence (TADF) is leading the third-generation technology of organic light-emitting diodes (OLEDs). TADF emitters are designed and synthesized using inexpensive organic donor and acceptor derivatives. TADF emitters are a potential candidate for next-generation display technology when compared with metal-complex-based phosphorescent dopants. Many studies are being conducted to enhance the external quantum efficiencies (EQEs) and photoluminescent quantum yield of green TADF devices. Blue TADF reached an EQE of over 35% with the support of suitable donor and acceptor moieties based on a suitable molecular design. The efficiencies of green TADF emitters can be improved when an appropriate molecular design is applied with an efficient device structure. The triazine acceptor has been identified as a worthy building block for green TADF emitters. Hence, we present here a review of triazine with various donor molecules and their device performances. This will help to design more suitable and efficient green TADF emitters for OLEDs.
高效热激活延迟荧光（TADF）引领着有机发光二极管（OLED）的第三代技术。TADF发光体是使用廉价的有机供体和受体衍生物设计合成的。与基于金属配合物的磷光掺杂剂相比，TADF发光体是下一代显示技术的潜在候选者。目前正在进行许多研究以提高绿色TADF器件的外量子效率（EQE）和光致发光量子产率。基于合适的分子设计，在合适的供体和受体部分的支持下，蓝色TADF的EQE达到了35%以上。当采用合适的分子设计和高效的器件结构时，绿色TADF发光体的效率可以得到提高。三嗪受体已被确定为绿色TADF发光体的一个有价值的构建单元。因此，我们在此对三嗪与各种供体分子及其器件性能进行综述。这将有助于设计出更适合、更高效的用于OLED的绿色TADF发光体。
