| Literature DB >> 28370383 |
Huifeng Yao1,2, Long Ye3, Junxian Hou4, Bomee Jang5, Guangchao Han2,6, Yong Cui1,2, Gregory M Su7, Cheng Wang7, Bowei Gao1,2, Runnan Yu1,2, Hao Zhang1,2, Yuanping Yi2,6, Han Young Woo5, Harald Ade3, Jianhui Hou1,2.
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.Entities:
Keywords: end-group modification; intermolecular π-π stacking; molecular energy levels; nonfullerene acceptors; organic solar cells
Year: 2017 PMID： 28370383 DOI： 10.1002/adma.201700254
Source DB: PubMed Journal: Adv Mater ISSN： 0935-9648 Impact factor: 30.849