Design and Synthesis of Red Through-Space Charge Transfer Thermally Activated Delayed Fluorescence Emitters with Donor/Acceptor/Donor Stacking
You‐Jun Yu, Min Song, Xin‐Yue Meng, Yang‐Kun Qu, Xueqi Wang, Long Chen, Shengyi Yang, Dong‐Ying Zhou, Zuo‐Quan Jiang, Liang‐Sheng Liao
Abstract
Red through-space charge transfer thermally activated delayed fluorescence (TSCT TADF) materials named SAF36DCPP and SAF27DCPP with sandwiched structures were synthesized. Single crystals indicated that the intramolecular C-H···π interactions play a vital role in rigidifying the sandwiched structure, which results in a fluorescence yield of 63% for SAF36DCPP compared to 40% for SAF27DCPP. Organic light-emitting diodes with SAF36DCPP as the emitter realized a maximum external quantum efficiency of 16.12%.
Topics & Concepts
StackingIntramolecular forceFluorescenceChemistryQuantum yieldPhotochemistryAcceptorCommon emitterCharge (physics)Electron donorOptoelectronicsMaterials scienceStereochemistryOpticsOrganic chemistryCondensed matter physicsPhysicsQuantum mechanicsCatalysisOrganic Light-Emitting Diodes ResearchOrganic Electronics and PhotovoltaicsLuminescence and Fluorescent Materials