title: Solution-processed small-molecule solar cells: breaking the 10% power conversion efficiency.
abstract: A two-dimensional conjugated small molecule (SMPV1) was designed and synthesized for high performance solution-processed organic solar cells. This study explores the photovoltaic properties of this molecule as a donor, with a fullerene derivative as an acceptor, using solution processing in single junction and double junction tandem solar cells. The single junction solar cells based on SMPV1 exhibited a certified power conversion efficiency of 8.02% under AM 1.5 G irradiation (100 mW cm(-2)). A homo-tandem solar cell based on SMPV1 was constructed with a novel interlayer (or tunnel junction) consisting of bilayer conjugated polyelectrolyte, demonstrating an unprecedented PCE of 10.1%. These results strongly suggest solution-processed small molecular materials are excellent candidates for organic solar cells.
authors.affiliation: 1] Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, USA [2] California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, USA [3].
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Liu
authors.forename: Chun-Chao
authors.initials: CC
authors.lastname: Chen
authors.forename: Ziruo
authors.initials: Z
authors.lastname: Hong
authors.forename: Jing
authors.initials: J
authors.lastname: Gao
authors.forename: Yang Michael
authors.initials: YM
authors.lastname: Yang
authors.forename: Huanping
authors.initials: H
authors.lastname: Zhou
authors.forename: Letian
authors.initials: L
authors.lastname: Dou
authors.forename: Gang
authors.initials: G
authors.lastname: Li
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang