Tuning the structures of polypyridinium salts as bifunctional cathode interfacial layers for all-solution-processed red quantum-dot light-emitting diodes

作     者：Shuguang Fu Xiaojun Yin Yang Tang Guohua Xie Chuluo Yang Shuguang Fu;Xiaojun Yin;Yang Tang;Guohua Xie;Chuluo Yang

作者机构：Shenzhen Key Laboratory of New Information Display and Storage MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Hubei Key Lab on Organic and Polymeric Optoelectronic MaterialsDepartment of ChemistryWuhan UniversityWuhan 430072China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2023年第34卷第4期

页      面：484-488页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 

基　　金：the financial support from the National Natural Science Foundation of China (Nos. 51803124and 62175189) Shenzhen Science and Technology Program (Nos.KQTD20170330110107046 and JCYJ20170818143831242) the Instrumental Analysis Center of Shenzhen University for Analytical Support the funding support from the Open Project Program of Wuhan National Laboratory for Optoelectronics (No. 2019WNLOKF015) the Open Fund of Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province,Shantou University (No.KLPAOSM202003) 

主　　题：Self-doping Cathode interfacial layer QLED Pyridinium salts All-solution-processable 

摘      要：Self-doping cathode interfacial layers(CILs) with both favorable electron injection and transport characteristics meet the key requirement for realizing high-performance optoelectronic devices with simplified structures. Herein, four different polypyridinium salts with tunable backbones, side chains and counterions are elaborately designed to afford them desirable film-forming property, polarity, structural rigidity and self-doping feature. All-solution-processed red quantum dot light-emitting diodes(QLEDs) employing them as bifunctional CILs render remarkably improved device performances in contrast to the typical CIL material of poly[(9,9-bis(30-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)](PFN).The maximum external quantum efficiency of 2.74% achieved in this work represents one of the best values among the all-solution-processed QLEDs with individual organic CILs.