A novel naphthalene diimide-based conjugated polymer as an electron transport material for non-fullerene organic solar cells. (18th May 2022)

• Record Type: Journal Article
• Authors: Gong, Shuai; Yin, Zhipeng; Zhang, Xinxin; He, Xiang; Zhang, Wenjun; Yang, Shangfeng; Song, Weijie
• Is Part Of: New journal of chemistry. Volume 46:Number 22(2022)
• Page Start: 10611
• Page End: 10617
• Publication Date: 2022-05-18
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj00895e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The only aliphatic amino side chains at the N-position of naphthalene diimide endow novel electron transport materials with good film-forming and interface modification properties, which improves the device efficiency and stability. Abstract : Electron transport materials (ETMs) play an important role in organic solar cells (OSCs) and the rapidly evolving non-fullerene acceptors have higher demands for ETMs. A novel naphthalene diimide-based conjugated polymer (PNDI-NN) with aliphatic amino side chains at the N-position of naphthalene diimide was synthesized and introduced as an ETM in non-fullerene OSCs. The only N-substituted aliphatic amino side chains endow PNDI-NN with good solubility in alcohol and an intense self-doping effect, which can not only reduce the work function of the metal electrode (Ag), but also have a good coverage on the active layer and promote electron transport. The device with PNDI-NN showed the best power conversion efficiency of 15.6% with an improved open-circuit voltage ( V OC ) and fill factor (FF). The device also exhibited good long-term stability in an inert atmosphere, in a humid environment and under continuous heating.