Benzobisthiazole Polymer with Resonance-assisted Hydrogen Bonds for High-performance Transistor and Solar Cell Applications

• 作者: Bing-Yong Liu Cong Xie Cong-Wu Ge Meng-Meng Cui Wei Yang Zai-Fei Ma Xi-Ke Gao Yin-Hua Zhou Qing Zhang
• 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: 147-156
• 页数: 10页
• 语种: 英文

摘要

Benzobisthiazole polymer with resonance-assisted hydrogen bonds (RAHBs) has been synthesized for both organic field-effect transistor and polymer solar cell applications.The properties of the hydrogen bonded polymer are compared with the reference polymer without RAHBs.Single-crystal X-ray diffraction analyses of the building block reveal that the RAHB interactions are formed between the carbamate hydrogen and imine nitrogen of the thiazoles.The hydrogen donor and acceptor are connected by π-conjugated molecular framework and the hydrogen-bridged quasi aromatic rings lock the conformation of the building block.The building block adopted a layered sandwich packing in crystal instead of slipped herringbone stacking which was often found in the crystal of benzobisthiazole derivatives.The polymer PCBTZ-TT with RAHBs showed deeper HOMO/LUMO energy level (about 0.2 eV) than reference polymer.The PCBTZ-TT demonstrated the hole mobility of 0.96 cm2·V-1·s-1 in field-effect transistor devices and achieved power conversion efficiency of 13.6％ in solar cell devices with Y6 as acceptor without any additive.