在热激活的延迟荧光发射器中使用次级电子接受单元管理热激活的延迟荧光<a href="#fn1" title="提供电子补充信息（ESI）。参见DOI：10.1039 / c9tc01354g">†</a>,Journal of Materials Chemistry C

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在热激活的延迟荧光发射器中使用次级电子接受单元管理热激活的延迟荧光 †
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2019-05-01 00:00:00 , DOI: 10.1039/c9tc01354g
Ha Lim Lee _{1,

2,

3,

4} , Kyung Hyung Lee _{1,

2,

3,

4} , Jun Yeob Lee _{1,

2,

3,

4} , Wan Pyo Hong _{4,

5,

6,

7}

Affiliation

研究了一种分子设计方法，该方法除主电子受体外还采用了次级电子接受单元，以此作为管理发射器热激活延迟荧光（TADF）性能的策略。主要骨架具有苯并呋喃咔唑供体，苯基接头和t丁基化二苯基三嗪受体是TADF装置中高效分子结构的平台，CN单元连接到苯基连接基上作为次级受体。引入一个或两个CN单元来检查二次电子接受单元数量对TADF特性的影响。二次电子接受单元的数目与TADF发射体的发射性质的相关性表明，就发射体的TADF性能而言，引入一个CN二次电子接受单元是理想的。通过引入t值，在没有CN二级受体的TADF发射器中，y色坐标低于0.10的深蓝色TADF器件实现了19.0％的最高效率。丁基化二苯基三嗪受体。而具有一个CN二次电子接受单元的TADF发射体显示出更高的外部量子效率，为26.6％。

"点击查看英文标题和摘要"

Management of thermally activated delayed fluorescence using a secondary electron accepting unit in thermally activated delayed fluorescent emitters†

A molecular design approach adopting secondary electron accepting units in addition to a main electron acceptor was investigated as a strategy to manage the thermally activated delayed fluorescent (TADF) performance of the emitters. A main skeleton possessing a benzofurocarbazole donor, a phenyl linker and a t-butylated diphenyltriazine acceptor was the platform of the molecular structures for high efficiency in TADF devices and CN units were attached to the phenyl linker as the secondary accepting unit. Either one or two CN units were introduced to examine the effect of the number of secondary electron accepting units on the TADF characteristics. Correlation of the number of secondary electron accepting units with the emission properties of the TADF emitters revealed that the introduction of one CN secondary electron accepting unit is ideal in terms of the TADF performance of the emitters. The TADF emitter without the CN secondary acceptor realized one of the highest efficiencies of 19.0% in deep blue TADF devices with a y color coordinate below 0.10 by introducing the t-butylated diphenyltriazine acceptor. Whereas, the TADF emitter with one CN secondary electron accepting unit displayed an even higher external quantum efficiency of 26.6%.

更新日期：2019-05-01

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