Dibenzophenazine‐Based TADF Emitters as Dual Electrochromic and Electroluminescence Materials
Dibenzophenazine‐Based TADF Emitters as Dual Electrochromic and Electroluminescence Materials
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基于二苯并吩嗪的 TADF 发射体作为双电致变色和电致发光材料
DOI：
10.1002/chem.202200826
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Data Przemyslaw
中科院分区：
文献类型：
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作者：
Zimmermann Crocomo Paola;Okazaki Masato;Hosono Takumi;Minakata Satoshi;Takeda Youhei;Data Przemyslaw
以前的工作报道了基于二苯并吩嗪受体基团的给体-受体-给体分子的合成，呈现出热激活延迟荧光（TADF）性质及其在高效电致发光器件组装中的应用。在这里，我们专注于通过UV-维斯-NIR光谱电化学和恒电位EPR技术的电荷载体物种的表征，除了在这项研究中描述的一些化合物的电聚合性能的调查。小分子和共轭聚合物的有前途的电致变色特性导致电致变色器件的组装和研究，证明了材料的多功能性，应用于电致变色窗和电致发光器件等不同的方法。此外，组装的OLED提供了高效率，具有小滚降，EQE高达20.5%，亮度值高达85 000 cd/m2。
Previous work has reported the synthesis of donor–acceptor–donor molecules based on dibenzophenazine acceptor group, presenting thermally activated delayed fluorescent (TADF) properties and their application in the assembly of highly efficient electroluminescent devices. Herein, we focus on the characterisation of charge carrier species through UV‐Vis‐NIR spectroelectrochemical and potentiostatic EPR techniques, in addition to the investigation of electropolymerisation properties of some compounds depicted in this study. The promising electrochromic features of both small molecules and conjugated polymers led to the assembly and investigation of electrochromic devices, evidencing the materials’ versatility, applied in such different approaches as electrochromic windows and electroluminescent devices. Furthermore, the assembled OLEDs provided high efficiencies, with small roll‐off, EQEs up to 20.5 % and luminance values up to 85 000 cd/m2.