An efficient aggregation-enhanced delayed fluorescence luminogen created with spiro donors and carbonyl acceptor for applications as an emitter and sensitizer in high-performance organic light-emitting diodes

作     者：Hao Chen Jiajie Zeng Ruishan Huang Jianghui Wang Junchu He Hao Liu Dezhi Yang Dongge Ma Zujin Zhao Ben Zhong Tang 

作者机构：State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhouChina School of Science and EngineeringShenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenGuangdongChina AIE InstituteGuangzhou Development DistrictHuangpuGuangzhouChina 

出 版 物：《Aggregate》 (聚集体（英文）)

年 卷 期：2023年第4卷第2期

页      面：146-155页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 

基　　金：National Natural Science Foundation of China,Grant/Award Number:21788102 Natural Science Foundation of Guangdong Province,Grant/Award Number:2019B030301003 

主　　题：aggregation-enhanced emission bipolar carrier transport organic light-emitting diode sensitizer thermally activated delayed fluorescence 

摘      要：Organic light-emitting diodes(OLEDs)fabricated using organic thermally activated delayed fluorescence materials as sensitizers have recently achieved significant advancements,but the serious efficiency roll-offs are still troublesome in most ***,a tailor-made multifunctional luminogen SBF-BP-SFAC containing 9,9′-spirobifluorene(SBF)and spiro[acridine-9,9-fluorene](SFAC)as electron donors and carbonyl as an electron acceptor is synthesized and ***-BPSFAC has the advantages of high thermal stability,aggregation-enhanced delayed fluorescence,and balanced carrier transport ability,and prefers horizontal dipole *** efficient OLEDs employing SBF-BP-SFAC as an emitter radiate intense cyan light with outstanding external quantum efficiencies(ηexts)of up to 30.6%.SBF-BP-SFAC can also serve as an excellent sensitizer for orange fluorescence,phosphorescence,and delayed fluorescence materials,providing excellent η exts of up to 30.3% with very small efficiency roll-offs due to the fast Förster energy transfer as well as exciton annihilation suppression by bulky spiro *** outstanding performances demonstrate the great potential of SBF-BP-SFAC as an emitter and sensitizer for OLEDs.