title: Four-Terminal Tandem Solar Cells Using CH3NH3PbBr3 by Spectrum Splitting.
abstract: In this work, the use of a high bandgap perovskite solar cell in a spectrum splitting system is demonstrated. A remarkable energy conversion efficiency of 23.4% is achieved when a CH3NH3PbBr3 solar cell is coupled with a 22.7% efficient silicon passivated emitter rear locally diffused solar cell. Relative enhancements of >10% are demonstrated by CH3NH3PbBr3/CH3NH3PbI3 and CH3NH3PbBr3/multicrystalline-screen-printed-Si spectral splitting systems with tandem efficiencies of 13.4% and 18.8%, respectively. The former is the first demonstration of an all perovskite split spectrum system. The CH3NH3PbBr3 cell on a mesoporous structure was fabricated by the vapor-assisted method while the planar CH3NH3PbI3 cell was fabricated by the gas-assisted method. This work demonstrates the advantage of the higher voltage output from the high bandgap CH3NH3PbBr3 cell and its suitability in a tandem system.
authors.affiliation: Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales , Sydney New South Wales 2052, Australia.
authors.forename: Rui
authors.initials: R
authors.lastname: Sheng
authors.affiliation: Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales , Sydney New South Wales 2052, Australia.
authors.forename: Anita W Y
authors.initials: AW
authors.lastname: Ho-Baillie
authors.affiliation: Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales , Sydney New South Wales 2052, Australia.
authors.forename: Shujuan
authors.initials: S
authors.lastname: Huang
authors.affiliation: Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales , Sydney New South Wales 2052, Australia.
authors.forename: Mark
authors.initials: M
authors.lastname: Keevers
authors.affiliation: Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales , Sydney New South Wales 2052, Australia.
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Hao
authors.affiliation: Department of Materials Engineering, Monash University , Melbourne, Victoria 3800, Australia.
authors.forename: Liangcong
authors.initials: L
authors.lastname: Jiang
authors.affiliation: Department of Materials Engineering, Monash University , Melbourne, Victoria 3800, Australia.
authors.forename: Yi-Bing
authors.initials: YB
authors.lastname: Cheng
authors.affiliation: Australian Centre for Advanced Photovoltaics (ACAP), School of Photovoltaic and Renewable Energy Engineering, University of New South Wales , Sydney New South Wales 2052, Australia.
authors.forename: Martin A
authors.initials: MA
authors.lastname: Green
keywords: energy conversion efficiency; perovskite solar cell; split spectrum system