title: A Silicon-Singlet Fission Tandem Solar Cell Exceeding 100% External Quantum Efficiency with High Spectral Stability.
abstract: After 60 years of research, silicon solar cell efficiency saturated close to the theoretical limit, and radically new approaches are needed to further improve the efficiency. The use of tandem systems raises this theoretical power conversion efficiency limit from 34% to 45%. We present the advantageous spectral stability of using voltage-matched tandem solar cells with respect to their traditional series-connected counterparts and experimentally demonstrate how singlet fission can be used to produce simple voltage-matched tandems. Our singlet fission silicon-pentacene tandem solar cell shows efficient photocurrent addition. This allows the tandem system to benefit from carrier multiplication and to produce an external quantum efficiency exceeding 100% at the main absorption peak of pentacene.
authors.affiliation: Cavendish Laboratory, University of Cambridge , JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
authors.forename: Luis M
authors.initials: LM
authors.lastname: Pazos-Outón
authors.affiliation: Center for Nanophotonics, AMOLF , Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors.forename: Ju Min
authors.initials: JM
authors.lastname: Lee
authors.affiliation: Center for Nanophotonics, AMOLF , Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors.forename: Moritz H
authors.initials: MH
authors.lastname: Futscher
authors.affiliation: Cavendish Laboratory, University of Cambridge , JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
authors.forename: Anton
authors.initials: A
authors.lastname: Kirch
authors.affiliation: Cavendish Laboratory, University of Cambridge , JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
authors.forename: Maxim
authors.initials: M
authors.lastname: Tabachnyk
authors.affiliation: Cavendish Laboratory, University of Cambridge , JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
authors.forename: Richard H
authors.initials: RH
authors.lastname: Friend
authors.affiliation: Center for Nanophotonics, AMOLF , Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors.forename: Bruno
authors.initials: B
authors.lastname: Ehrler