材料科学
电致发光
荧光
分子间力
量子效率
分子
激子
猝灭(荧光)
有机发光二极管
芯(光纤)
自旋(空气动力学)
发光
光电子学
光化学
纳米技术
光学
图层(电子)
凝聚态物理
化学
物理
有机化学
工程类
航空航天工程
复合材料
作者
Junhui Liu,Zhennan Zhao,Quanwei Li,Lei Hua,Haisong Zhao,Chengcheng Yu,Weiyu Cao,Zhongjie Ren
标识
DOI:10.1021/acsami.3c08770
摘要
Based on the tetraphenylsilane skeleton, a new class of thermally activated delayed fluorescence (TADF) molecules have been designed and synthesized. Benefiting from the unique tetrahedron architecture of tetraphenylsilane, the intermolecular distance between TADF units can be enlarged and thus weakened the aggregation-induced quenching of triplet excitons. By adjusting the numbers of TADF subunits, the spin–orbit coupling processes can be controlled, leading to efficient up-conversion processes. The related OLEDs are fabricated through the solution processing technology, and pure-blue and green electroluminescence were observed with maximum external quantum efficiencies (EQEmax) of 6.6 and 13.8% as well as Commission Internationale de l’Eclairage coordinates of (0.14, 0.15) and (0.25, 0.45), respectively. This study provides a new idea for designing color-tunable TADF emitters through spatial structure regulation.
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