title: Homo-Tandem Polymer Solar Cells with VOC >1.8 V for Efficient PV-Driven Water Splitting.
abstract: Efficient homo-tandem and triple-junction polymer solar cells are constructed by stacking identical subcells composed of the wide-bandgap polymer PBDTTPD, achieving power conversion efficiencies >8% paralleled by open-circuit voltages >1.8 V. The high-voltage homo-tandem is used to demonstrate PV-driven electrochemical water splitting with an estimated solar-to-hydrogen conversion efficiency of ≈6%.
authors.affiliation: Physical Sciences and Engineering Division, Solar and Photovoltaic Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Yangqin
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Physical Sciences and Engineering Division, Solar and Photovoltaic Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Vincent M
authors.initials: VM
authors.lastname: Le Corre
authors.affiliation: Physical Sciences and Engineering Division, Solar and Photovoltaic Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Gaïtis
authors.affiliation: Physical Sciences and Engineering Division, Solar and Photovoltaic Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Marios
authors.initials: M
authors.lastname: Neophytou
authors.affiliation: Physical Sciences and Engineering Division, Solar and Photovoltaic Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Mahmoud Abdul
authors.initials: MA
authors.lastname: Hamid
authors.affiliation: Physical Sciences and Engineering Division, Solar and Photovoltaic Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Takanabe
authors.affiliation: Physical Sciences and Engineering Division, Solar and Photovoltaic Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Pierre M
authors.initials: PM
authors.lastname: Beaujuge
keywords: PBDTTPD; PCBM; PV-driven water splitting; bulk heterojunction solar cells; homo-tandem; multijunction devices; organic photovoltaics