Recent Progress in Photovoltaic Research of Non-Fused Ring-Based Non-Fullerene Acceptor Materials with the Aid of Intramolecular Noncovalent Interactions
GAO Yan1, XU Qian2, HUANG Hao1, LI Cui-Hong1**
1. College of Chemistry, Beijing Normal University, Beijing 100875,China;
2. Tsinghua University High School, Jiangtai District, Beijing 100015,China
Abstract Non-fullerene fused-ring electron acceptors for application in organic solar cells (OSCs) have attracted great research interests because of their easy structural modulation, broad and intense optical absorption and impressive power conversion efficiency (PCE). Fused-ring electron acceptors often possess a large central planar ladder-type fused-ring donor unit, which are synthesized by complicated and low-yield ring closure reactions. The multi-step synthesis of fused ring cores will inevitably increase the synthetic cost. Recently,intramolecular noncovalent interactions by introducing heteroatoms, such as O, F, N and Se into the molecular, have been utilized to lock the adjacent aromatic units to construct the planar ladder-like core by avoiding ring-closure reactions. The noncovalent interaction can enhance the molecule planarity, expand the absorption and reduce the synthesis cost. In this perspective, we review the recent development of non-fused ring electron acceptors with the aid of noncovalent interactions and discuss the effect of this interactions on molecular structure and its photovoltaic properties and look forward to its development trend and application prospect.
GAO Yan, XU Qian, HUANG Hao, LI Cui-Hong. Recent Progress in Photovoltaic Research of Non-Fused Ring-Based Non-Fullerene Acceptor Materials with the Aid of Intramolecular Noncovalent Interactions[J]. Chinese Journal of Chemical Education, 2022, 43(16): 99-109.