Achieving Highly Efficient Nonfullerene Organic Solar Cells with Improved Intermolecular Interaction and Open‐Circuit Voltage. Issue 21 (29th March 2017)

• Record Type: Journal Article
• Authors: Yao, Huifeng; Ye, Long; Hou, Junxian; Jang, Bomee; Han, Guangchao; Cui, Yong; Su, Gregory M.; Wang, Cheng; Gao, Bowei; Yu, Runnan; Zhang, Hao; Yi, Yuanping; Woo, Han Young; Ade, Harald; Hou, Jianhui
• Is Part Of: Advanced materials. Volume 29:Issue 21(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-03-29
• Subjects: end‐group modification -- intermolecular π–π stacking -- molecular energy levels -- nonfullerene acceptors -- organic solar cells; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201700254
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract : A new acceptor–donor–acceptor‐structured nonfullerene acceptor ITCC (3, 9‐bis(4‐(1, 1‐dicyanomethylene)‐3‐methylene‐2‐oxo‐cyclopenta[ b ]thiophen)‐5, 5, 11, 11‐tetrakis(4‐hexylphenyl)‐dithieno[2, 3‐ d ′:2, 3‐ d′ ]‐s‐indaceno[1, 2‐ b :5, 6‐ b′ ]‐dithiophene) is designed and synthesized via simple end‐group modification. ITCC shows improved electron‐transport properties and a high‐lying lowest unoccupied molecular orbital level. A power conversion efficiency of 11.4% with an impressive V OC of over 1 V is recorded in photovoltaic devices, suggesting that ITCC has great potential for applications in tandem organic solar cells. Abstract : A new acceptor–donor–acceptor‐structured nonfullerene acceptor, ITCC, is designed and synthesized via simple end‐group modification. ITCC shows improved electron‐transport properties and a high‐lying lowest unoccupied molecular orbital level. A power conversion efficiency of 11.4% with an impressive V OC of over 1 V is recorded in photovoltaic devices, suggesting great potential for applications in tandem organic solar cells.