title: Improve the operational stability of the inverted organic solar cells using bilayer metal oxide structure.
abstract: Operational stability is a big obstacle for the application of inverted organic solar cells (OSCs), however, less talked about in the research reports. Due to photoinduced degradation of the metal oxide interlayer, which can cause shunts generation and degeneration in ZnO interlayer, a significant degradation of open circuit voltage (Voc) and fill factor (FF) has been observed by in situ periodic measurements of the device current density-voltage (J-V) curves with light illumination. By combining TiOx and ZnO to form bilayer structures on ITO, the photovoltaic performance is improved and the photoinduced degradation is reduced. It was found that the device based on ZnO/TiOx bilayer structure achieved better operational stability as compared to that with ZnO or TiOx interlayer.
authors.affiliation: Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Chang
authors.forename: Zhenhua
authors.initials: Z
authors.lastname: Lin
authors.forename: Changyun
authors.initials: C
authors.lastname: Jiang
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Zhu
authors.forename: Jishan
authors.initials: J
authors.lastname: Wu
keywords: TiOx; ZnO; bilayer structure; inverted solar cell; metal oxide; photoinduced degradation