Polymer donors with phenylacetate pendants for efficient organic photovoltaics

• DOI: 10.1039/d4cc06652a
• Publication Date: 2025-01-28T14:00:53Z
• Authors: Youlin Zhang; Jiayu Wang; Yating Mo; Hongxiang Li; Fuqi Zhao; Hongbin Sun; Weibo Kong; Cenqi Yan; Hanlin Wang; Zhenjie Ni; Pei Cheng
• Keywords: Phenylacetate

Two polymer donors PPAF and PPAT with phenylacetates as pendant side chains were designed synthesized. The pendants of are furan thiophene, respectively. Relative to the sulfur in thiophene pendants, oxygen can induce more intermolecular interactions. Thus, neat films, shows ordered packing than PPAT; but blended over-interaction between BTP-eC9 acceptor mutually disturbs their packing, resulting reduced crystallinity thereby hindering device performance. power conversion efficiencies PPAF:BTP-eC9 PPAT:BTP-eC9 based devices 4.26% 15.6%, This work provides a new chain engineering strategy optimize performance donors.