Intrinsically inert hyperbranched interlayer for enhanced stability of organic solar cells

• 作者: Yawen Li Tengfei Li Jiayu Wang Xiaowei Zhan Yuze Lin
• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: ARTICLES
• 页码范围: 171-177
• 页数: 7页
• 语种: 英文

摘要

Device stability becomes one of the most crucial issues for the commercialization of organic solar cells(OSCs) after high power conversion efficiencies have been achieved.Besides the intrinsic stability of pho-toactive materials,the chemical/catalytic reaction between interfacial materials and photoactive materi-als is another critical factor that determines the stability of OSC devices.Herein,we design and synthesize a reaction-inert rylene diimide-embedded hyperbranched polymer named as PDIEIE,which effectively reduces the work function of indium tin oxide electrode from 4.62 to 3.65 eV.Meanwhile,PDIEIE shows negligible chemical reaction with high-performance photoactive materials and no catalytic effect under strong ultraviolet illumination,resulting in much better photo-stability of OSCs with PDIEIE cathode interlayer (CIL),relative to the traditional CILs,including most-widely used metal oxides and polyethyle-neimine derivatives.