title: Neutral-Color Semitransparent Organic Solar Cells with All-Graphene Electrodes.
abstract: Graphene has been considered as a promising material for transparent electrodes due to its advantages including ultrahigh carrier mobilities, high optical transmittance, excellent mechanical flexibility, and good stability. Solar cells with all-graphene electrodes are potentially low-cost, high-performance, and environmental friendly, which however have not been realized until now. Here, we report the fabrication of semitransparent organic photovoltaics (OPVs) with graphene transparent electrodes as both cathode and anode, which can absorb light from both sides with the power conversion efficiency up to 3.4%. Meanwhile, the OPVs have a neutral color and show the transmittance of ∼40% in the visible region, making them suitable for some special applications, such as power-generating windows and building integrated photovoltaics. This work demonstrates the great potential of graphene for the applications in carbon-based optoelectronic devices.
authors.affiliation: Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University , Hong Kong, China.
authors.forename: Zhike
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University , Hong Kong, China.
authors.forename: Peng
authors.initials: P
authors.lastname: You
authors.affiliation: Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University , Hong Kong, China.
authors.forename: Shenghua
authors.initials: S
authors.lastname: Liu
authors.affiliation: Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University , Hong Kong, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Yan
keywords: efficiency; graphene; organic photovoltaic; semitransparent