Organic photovoltaic cell with 17％ efficiency and superior processability

• 作者: Baojun Lin Bowei Gao Cunbin An Huifeng Yao Jianhui Hou Kaihu Xian Ling Hong Pengqing Bi Tao Zhang Wei Ma Yabing Tang Yong Cui
• 来源期刊: 国家科学评论（英文版）
• 关键词: organic photovoltaic cells power conversion efficiency scalable large-area production processability non-fugerene acceptor
• 年，卷（期）: 2020,（7）
• 页码范围: 1239-1246
• 页数: 8页
• 语种: 英文
• DOI: 10.1093/nsr/nwz200

摘要

The development of organic photoactive materials,especially the newly emerging non-fuilerene electron acceptors (NFAs),has enabled rapid progress in organic photovoltaic (OPV) cells in recent years.Although the power conversion efficiencies (PCEs) of the top-performance OPV cells have surpassed 16％,the devices are usually fabricated via a spin-coating method and are not suitable for large-area production.Here,we demonstrate that the fine-modification of the flexible side chains of NFAs can yield 17％ PCE for OPV cells.More crucially,as the optimal NFA has a suitable solubility and thus a desirable morphology,the high efficiencies of spin-coated devices can be maintained when using scalable blade-coating processing technology.Our results suggest that optimization of the chemical structures of the OPV materials can improve device performance.This has great significance in larger-area production technologies that provide important scientific insights for the commercialization of OPV cells.