title: Microcavity-enhanced light-trapping for highly efficient organic parallel tandem solar cells.
abstract: A high-performance parallel tandem solar cell employing ultra-thin Ag as the intermediate anode is demonstrated, which comprises a semitransparent front sub-cell and a microcavity assisted back sub-cell. In addition to the extended optical field as a result of the tandem architecture, the prominent microcavity resonance formed in the back sub-cell enables such a parallel tandem configuration to possess high light utilization efficiency (the peak EQE value is over 80%) and a high photovoltaic performance of 9.2%. This study establishes an effective architecture that can be generally applicable to all organic materials for improving their performance.
authors.affiliation: Department of Materials Science and Engineering, University of Washington, Seattle, USA; State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Lijian
authors.initials: L
authors.lastname: Zuo
authors.forename: Chu-Chen
authors.initials: CC
authors.lastname: Chueh
authors.forename: Yun-Xiang
authors.initials: YX
authors.lastname: Xu
authors.forename: Kung-Shih
authors.initials: KS
authors.lastname: Chen
authors.forename: Yue
authors.initials: Y
authors.lastname: Zang
authors.forename: Chang-Zhi
authors.initials: CZ
authors.lastname: Li
authors.forename: Hongzheng
authors.initials: H
authors.lastname: Chen
authors.forename: Alex K-Y
authors.initials: AK
authors.lastname: Jen
keywords: efficient light absorption; micro-cavity effect; organic photovoltaics; parallel tandem solar cells; semitransparent electrode