One-shot synthesis of heavy-atom-modified carbazole-fused multi-resonance thermally activated delayed fluorescence materials

作     者：Jia-Jun Hu Jia-Qi Liang Zhi-Ping Yan Hua-Xiu Ni Xiang-Ji Liao You-Xuan Zheng 胡家俊;梁佳琪;晏志平;倪华秀;廖湘骥;郑佑轩

作者机构：State Key Laboratory of Coordination ChemistryJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Green Catalysis Centerand College of ChemistryZhengzhou UniversityZhengzhou450001China 

基　　金：supported by the National Natural Science Foundation of China(92256304,U23A20593) the Fundamental Research Funds for the Central Universities(020514380294) 

出 版 物：《Science China Materials》 (中国科学（材料科学）（英文版）)

年 卷 期：2024年第67卷第9期

页      码：2789-2795页

摘      要：Efficient multi-resonance thermally activated delayed fluorescence(MR-TADF)materials hold significant potential for applications in organic light-emitting diodes(OLEDs)and ultra-high-definition ***,the stringent synthesis conditions and low yields typically associated with these materials pose substantial challenges for their practical *** this study,we introduce an innovative strategy that involves peripheral modification with sulfur and selenium atoms for two materials,CFDBNS and *** approach enables a directed one-shot borylation process,achieving synthesis yields of 66%and 25%,respectively,while also enhancing reverse intersystem crossing *** emitters exhibit ultra-narrowband sky-blue emissions centered around 474 nm,with full width at half maximum(FWHM)values as narrow as 19 nm in dilute toluene solutions,along with high photoluminescence quantum yields of 98%and 99%in doped films,*** OLEDs based on CFDBNS and CFDBNSe display sky-blue emissions with peaks at 476 and 477 nm and exceptionally slender FWHM values of 23 ***,the devices demonstrate remarkable performances,achieving maximum external quantum efficiencies of 24.1%and 27.2%.This work presents a novel and straightforward approach for the incorporation of heavy atoms,facilitating the rapid construction of efficient MR-TADF materials for OLEDs.

主 题 词：one-shot synthesis multi-resonance thermally activated delayed fluorescence carbazole-fused dual-boron embedded framework ultra-narrowband emission organic light-emitting diode 

学科分类：08[工学] 080501[080501] 0805[工学-能源动力学] 0803[工学-仪器类] 

核心收录：

D　O　I：10.1007/s40843-024-3008-8

馆 藏 号：203131103...