Synthesis of Thieno[3,4-b]pyrazine-based Alternating Conjugated Polymers via Direct Arylation for Near-infrared OLED Applications  

作　　者：Ze-Wang He Qiang Zhang Chen-Xi Li Hong-Ting Han Yan Lu 

机构地区：[1]School of Materials Science&Engineering,Tianjin Key Laboratory for Photoelectric Materials and Devices,Key Laboratory of Display Materials&Photoelectric Devices,Ministry of Education,Tianjin University of Technology,Tianjin 300384,China [2]College of Chemistry,Nankai University,Tianjin 300071,China

出　　处：《Chinese Journal of Polymer Science》2022年第2期138-146,共9页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21604063 and 52173010);the Program for Prominent Young College Teachers of Tianjin Educational Committee。

摘　　要：Three alternating conjugated polymers,namely PFTP,PCz TP,and PSi TP,which combine a thieno[3,4-b]pyrazine(TP)unit with different benzene-based donor units such as 9,9-dioctylfluorene,9-heptadecyl-9H-carbazole and 5,5-dioctyl-5H-dibenzo[b,d]silole,were synthesized in good yield(>85%)and high molecular weight up to Mn=5.82×10^(4) via direct arylation polymerization(DAr P).All the resultant polymers exhibit moderate bandgap of about 1.80 e V and strong deep red/near-infrared emitting in the solid state.Among them,the PSi TP-based electroluminescence(EL)devices with an architecture of ITO/PEDOT:PSS/PTAA/emitting layer/TPBi/Li F/Al give the best performance with a maximum luminance of 2543 cd/m^(2) at 478 m A/cm^(2).This work expands the application scope of high-performance conjugated polymers which can be synthesized by DAr P.

关 键 词：Thieno[3 4-b]pyrazine Alternating D-A structure Direct arylation polymerization Conjugated polymer Organic light-emitting diodes 

分 类 号：TQ317[化学工程—高聚物工业] TN383.1[电子电信—物理电子学]