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
• 来源期刊: 高分子科学（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: RESEARCH ARTICLES
• 页码范围: 138-146
• 页数: 9页
• 语种: 英文

摘要

Three alternating conjugated polymers,namely PFTP,PCzTP,and PSiTP,which combine a thieno[3,4-b]pyrazine (TP) unit with different benzene-based donor units such as 9,9-dioctylfluorene,9-heptadecyl-gH-carbazole and 5,5-dioctyl-5H-dibenzo[b,d]silole,were synthesized in good yield (＞85％) and high molecular weight up to Mn=5.82×104 via direct arylation polymerization (DArP).All the resultant polymers exhibit moderate bandgap of about 1.80 eV and strong deep red/near-infrared emitting in the solid state.Among them,the PSiTP-based electroluminescence (EL) devices with an architecture of ITO/PEDOT:PSS/PTAA/emitting layer/TPBi/LiF/Al give the best performance with a maximum luminance of 2543 cd/m2 at 478 mA/cm2.This work expands the application scope of high-performance conjugated polymers which can be synthesized by DArP.