Zhang Yan, Zhang Cai'e, Zhang Andong, Wu Hongbo, Ran Guangliu, Zhou Yuanyuan, Wang Xiaodong, Li Cuihong, Liu Yahui, Yang Chuluo, Tang Zheng, Zhang Wenkai, Bo Zhishan
Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China.
College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.
ACS Appl Mater Interfaces. 2022 May 11;14(18):21287-21294. doi: 10.1021/acsami.2c01190. Epub 2022 Apr 28.
Three nonfused ring electron acceptors, , , and , are designed and synthesized. Unlike , with two sterically hindered 2,4,6-triisopropyl-phenyl groups is highly soluble, which provides a good opportunity for solution processability. Compared with , with fluorinated end-groups exhibits red-shifted absorption. Due to these synergistic adjustment, -based devices displayed a high power conversion efficiency of 12.55%, higher than that of (9.49%). The result demonstrates that the introduction of large steric substituents in the π-bridge units and electron-withdrawing end-groups plays a positive role in the construction of high-efficiency nonfused ring electron acceptors.
设计并合成了三种非稠环电子受体，即[受体名称1]、[受体名称2]和[受体名称3]。与[对比受体名称]不同，带有两个空间位阻较大的2,4,6-三异丙基苯基的[受体名称2]具有高溶解性，这为溶液加工性提供了良好的机会。与[对比受体名称]相比，带有氟化端基的[受体名称3]表现出红移吸收。由于这些协同调节作用，基于[受体名称]的器件显示出12.55%的高功率转换效率，高于[对比器件]的（9.49%）。结果表明，在π桥单元中引入大的空间位阻取代基和吸电子端基在构建高效非稠环电子受体中起积极作用。
