A Y6-based polymerized small-molecule acceptor with non-conjugated alkyl linkages for efficient all-polymer solar cells. (December 2021)

• Record Type: Journal Article
• Authors: Wu, Xiaomin; Hao, Xiangyu; Deng, Ping; Chen, Huipeng
• Is Part Of: Dyes and pigments. Volume 196(2022)
• Publication Date: 2021-12
• Subjects: Polymer acceptor -- Polymerized small-molecule acceptor -- Polymer semiconductor -- Non-conjugated polymer -- All-polymer solar cells; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2021.109824
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: A polymerized small-molecule acceptor, NC-PY6, has been newly designed and successfully synthesized. NC-PY6 contains a rigid conjugated Y6-derived fused-ring small acceptor SY6 and a non-conjugated alkyl chain as the linkage. Similar to SY6, NC-PY6 exhibits the narrow bandgap of 1.44 eV and the low-lying lowest unoccupied molecular orbital energy level (−3.92 eV), which match with the known wide-bandgap polymer donor D18. The D18:SY6 based polymer solar cells showed a power conversion efficiency (PCE) of 13.1% with a voltage loss of 0.58 V. The all-polymer solar cells (all-PSCs) based on D18:NC-PY6 blend film gave an encouraging PCE of 12.3% with a voltage loss of 0.57 V. The results demonstrate the potential of molecular design strategy of polymerizing small-molecule acceptor with the non-conjugated alkyl chain as the linkage for new type of polymer acceptors for high-performance all-PSCs. Graphical abstract: Image 1 Highlights: A polymerized small-molecule acceptor, NC-PY6, has been newly designed and successfully synthesized. NC-PY6 contains a rigid conjugated Y6-derived fused-ring small acceptor SY6 and a non-conjugated alkyl chain as the linkage. The D18:NC-PY6 based all-PSCs achieves a PCE of 12.3%.