Dye‐Incorporated Polynaphthalenediimide Acceptor for Additive‐Free High‐Performance All‐Polymer Solar Cells. (13th March 2018)

• Record Type: Journal Article
• Authors: Chen, Dong; Yao, Jia; Chen, Lie; Yin, Jingping; Lv, Ruizhi; Huang, Bin; Liu, Siqi; Zhang, Zhi‐Guo; Yang, Chunhe; Chen, Yiwang; Li, Yongfang
• Is Part Of: Angewandte Chemie. Volume 130:Number 17(2018)
• Page Start: 4670
• Page End: 4674
• Publication Date: 2018-03-13
• Subjects: Copolymerisation -- Organische Farbstoffe -- Organische Halbleiter -- Polymerakzeptoren -- Polymersolarzellen; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201800035
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: All‐polymer solar cells (all‐PSCs) can offer unique advantages for applications in flexible devices, and naphthalene diimide (NDI)‐based polymer acceptors are the widely used polymer acceptors. However, their power conversion efficiency (PCE) still lags behind that of state‐of‐the‐art polymer solar cells, due to low light absorption, suboptimal energy levels and the strong aggregation of the NDI‐based polymer acceptor. Herein, a rhodanine‐based dye molecule was introduced into the NDI‐based polymer acceptor by simple random copolymerization and showed an improved light absorption coefficient, an up‐shifted lowest unoccupied molecular orbital level and reduced crystallization. Consequently, additive‐free all‐PSCs demonstrated a high PCE of 8.13 %, which is one of the highest performance characteristics reported for all‐PSCs to date. These results indicate that incorporating a dye into the n‐type polymer gives insight into the precise design of high‐performance polymer acceptors for all‐PSCs. Abstract : Ein Rhodamin‐Farbstoff wurde in einen Naphthalendiimid‐haltigen Polymerakzeptor mittels statistischer Copolymerisation integriert, wodurch der Lichtabsorptionskoeffizent gesteigert, das LUMO angehoben und die Kristallisation reduziert wurde. Polymersolarzellen mit diesem Akzeptor erreichen einen Wirkungsgrad (PCE) von 8.13 %.