Crystalline Cooperativity of Donor and Acceptor Segments in Double‐Cable Conjugated Polymers toward Efficient Single‐Component Organic Solar Cells. (18th September 2019)

• Record Type: Journal Article
• Authors: Li, Cheng; Wu, Xianxin; Sui, Xinyu; Wu, Hongbo; Wang, Chao; Feng, Guitao; Wu, Yonggang; Liu, Feng; Liu, Xinfeng; Tang, Zheng; Li, Weiwei
• Is Part Of: Angewandte Chemie. Volume 131:Number 43(2019)
• Page Start: 15678
• Page End: 15686
• Publication Date: 2019-09-18
• Subjects: Konjugierte Polymere -- Kristalline Kooperativität -- Nanophasentrennung -- Perylenbisimid -- Solarzellen; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201910489
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The crystalline cooperativity of the donor and acceptor segment in double‐cable conjugated polymers plays an important role in the nanophase separation and photovoltaic performance in single‐component organic solar cells (SCOSCs). Two double‐cable conjugated polymers with the same conjugated backbone and perylene bisimide (PBI) side units were designed in which PBIs were positioned symmetrically and perpendicularly (P1 ) and asymmetrically and slantingly (P2 ) along the conjugated backbones. After thermal annealing, both conjugated backbones and PBI side units in P1 tend to form ordered nanostructures, while PBI side units in P2 dominated the crystallization and hamper the crystallization of conjugated backbones. P1 showed good crystalline cooperativity between conjugated backbones and PBI side units, resulting in improved power conversion efficiencies (PCEs) up to 3.43 % in SCOSCs, while P2 with poor crystalline cooperativity exhibited PCEs below 2.42 %. Abstract : Als wichtiger Parameter zum Studium der Nanophasentrennung in konjugierten Doppelkabel‐Polymeren wird kristalline Kooperativität vorgeschlagen. Eine gute kristalline Kooperativität mit dem konjugierten Rückgrat und Akzeptor‐Seiteneinheiten sollte einen effizienten Ladungstransport für den Einsatz in leistungsstarken organischen Einkomponenten‐Solarzellen ermöglichen.