Achieving Highly Efficient Nonfullerene Organic Solar Cells with Improved Intermolecular Interaction and Open‐Circuit Voltage

• DOI: 10.1002/adma.201700254
• Publication Date: 2017-03-29T11:17:01Z
• Authors: Huifeng Yao; Long Ye; Junxian Hou; Bomee Jang; Guangchao Han; Yong Cui; Gregory M. Su; Cheng Wang; Bowei Gao; Runnan Yu; Hao Zhang; Yuanping Yi; Han Young Woo; Harald Ade; Jianhui Hou
• Keywords: Acceptor; Tandem; Open-circuit voltage; Electron acceptor; HOMO/LUMO

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. shows improved electron-transport properties a high-lying lowest unoccupied molecular orbital level. power conversion efficiency of 11.4% with an impressive V OC over 1 recorded in photovoltaic devices, suggesting that has great potential for applications tandem organic solar cells.