Resonance hosts for high efficiency solution-processed blue and white electrophosphorescent devices  

作　　者：Huanhuan Li Jibiao Jin Yuan Xiang Ying Zhang Ye Tao Mingguang Li Qin Xue Guohua Xie Wei Huang Runfeng Chen 

机构地区：[1]Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors,Institute of Advanced Materials(IAM),Nanjing University of Posts&Telecommunications,Nanjing 210023,China [2]Sauvage Center for Molecular Sciences,Hubei Key Lab on Organic and Polymeric Optoelectronic Materials,Department of Chemistry,Wuhan University,Wuhan 430072,China [3]Frontiers Science Center for Flexible Electronics(FSCFE),Shaanxi Institute of Flexible Electronics(SIFE)&Shaanxi Institute of Biomedical Materials and Engineering(SIBME),Northwestern Polytechnical University(NPU),Xi’an 710072,China

出　　处：《Science China Chemistry》2020年第11期1645-1651,共7页中国科学（化学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(21704042,21604039,61875090,51873159,91833306,21674049);the Six Talent Plan of Jiangsu Province(XCL-049);1311 Talents Program of Nanjing University of Posts and Telecommunications(Dingfeng);the Natural Science Fund for Colleges and Universities in Jiangsu Province(17KJB150017);China Postdoctoral Science Foundation Funded Project(2018M642284);the Nanjing University of Posts and Telecommunications Start-up Fund(NUPTSF)(NY219007,NY217140);the Science and Technology Innovation Project for Overseas Students in Nanjing.

摘　　要：The exploration of high-performance solution-processible host materials for blue and white electrophosphorescent devices is a key and fundamental challenge in the ongoing development of organic semiconductors.Herein,two solution-processible resonance host materials with self-adaptive characteristics are delicately designed and constructed.Because of the dynamic tautomerization upon resonance variation,these smart hosts show self-adaptive and selectively enhanced charge carrier flux at high triplet energy levels.Conferred by the resonance molecules,solution-processed blue and white devices exhibit excellent maximum current efficiencies(CEs)of 29.8 and 57.3 cd A−1,and external quantum efficiencies(EQEs)up to 14.5%and 23.5%,respectively.Our works highlight the significant progress of the solution-processed phosphorescent organic light-emitting diodes(PhOLEDs)using resonance host molecules,potentially furnishing a leap forward in constructing advanced organic semiconductors for next-generation optoelectronic devices.

关 键 词：solution-processed resonance hosts dynamic self-adaptation high-efficiency electrophosphorescence 

分 类 号：TB34[一般工业技术—材料科学与工程] TN312.8[电子电信—物理电子学]