有机发光二极管
电致发光
磷光
光化学
荧光
发光
并五苯
磷光有机发光二极管
激发态
量子效率
单重态
材料科学
化学
光电子学
纳米技术
原子物理学
图层(电子)
物理
量子力学
薄膜晶体管
作者
Mengke Li,Wenjie Xie,Xinyi Cai,Xiaomei Peng,Kunkun Liu,Qing Gu,Jiadong Zhou,Weidong Qiu,Zijian Chen,Yiyang Gan,Shi‐Jian Su
标识
DOI:10.1002/ange.202209343
摘要
Abstract Highly efficient organic thermally activated delayed fluorescence (TADF) and room‐temperature phosphorescence (RTP) emitters for organic light‐emitting diodes (OLEDs) generally consist of a twisted donor–acceptor skeleton with aromatic amine donors. Herein, through introducing sulfur atoms into isomeric pentaphene and pentacene frameworks, we demonstrate a set of polycyclic luminophores exhibiting efficient TADF and RTP characters. The incorporation of sulfur atoms confirms a folded molecular plane, while intensifies singlet–triplet spin‐orbit coupling. Further, the isomeric effect has a significant effect on the electronic structure of excited state, giving rise to the investigated compounds tunable luminescence mechanisms of TADF and RTP. With efficient triplet harvesting ability, maximum external quantum efficiencies up to 25.1 % and 8.7 % are achieved for the corresponding TADF and RTP OLEDs, verifying the great potential of sulfur‐bridged frameworks for highly efficient devices.
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