期刊
ADVANCED ENERGY MATERIALS
卷 4, 期 5, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201300739
关键词
thick active layers; diketopyrrolopyrrole; thienylbenzodithiophene; polymer side chains; high carrier mobility
类别
资金
- Office of Naval Research [N00014-11-1-0250]
- National Science Foundation [DMR-1210893]
- UCLA Henry Samueli School of Engineering and Applied Science
- NSF [DGE-0903720]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1210893] Funding Source: National Science Foundation
A series of low-bandgap polymers based on thienyl benzodithiophene (BDTT) and furan-substituted diketopyrrolopyrrole (FDPP) units with different side chains are presented. By replacing the branched ethylhexyl group on the FDPP unit with linear side chains, the structural order and carrier mobility of the modified polymers are enhanced accordingly. The power conversion efficiencies (PCE) of single-junction devices based on polymers of this series are improved from approximate to 5% to approximate to 7%. More importantly, devices made from the modified polymers show excellent photovoltaic performance with a thick active layer of up to 360 nm, a very promising characteristic for the industrial implementation of polymer solar cell devices.
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