title: Charge-Carrier Dynamics and Mobilities in Formamidinium Lead Mixed-Halide Perovskites.
abstract: The mixed-halide perovskite FAPb(Bry I1-y )3 is attractive for color-tunable and tandem solar cells. Bimolecular and Auger charge-carrier recombination rate constants strongly correlate with the Br content, y, suggesting a link with electronic structure. FAPbBr3 and FAPbI3 exhibit charge-carrier mobilities of 14 and 27 cm(2) V(-1) s(-1) and diffusion lengths exceeding 1 μm, while mobilities across the mixed Br/I system depend on crystalline phase disorder.
authors.affiliation: Clarendon Laboratory, Oxford University, Parks Road, OX1 3PU, Oxford, UK.
authors.forename: Waqaas
authors.initials: W
authors.lastname: Rehman
authors.affiliation: Clarendon Laboratory, Oxford University, Parks Road, OX1 3PU, Oxford, UK.
authors.forename: Rebecca L
authors.initials: RL
authors.lastname: Milot
authors.affiliation: Clarendon Laboratory, Oxford University, Parks Road, OX1 3PU, Oxford, UK.
authors.forename: Giles E
authors.initials: GE
authors.lastname: Eperon
authors.affiliation: Clarendon Laboratory, Oxford University, Parks Road, OX1 3PU, Oxford, UK.
authors.forename: Christian
authors.initials: C
authors.lastname: Wehrenfennig
authors.affiliation: Clarendon Laboratory, Oxford University, Parks Road, OX1 3PU, Oxford, UK.
authors.forename: Jessica L
authors.initials: JL
authors.lastname: Boland
authors.affiliation: Clarendon Laboratory, Oxford University, Parks Road, OX1 3PU, Oxford, UK.
authors.forename: Henry J
authors.initials: HJ
authors.lastname: Snaith
authors.affiliation: Clarendon Laboratory, Oxford University, Parks Road, OX1 3PU, Oxford, UK.
authors.forename: Michael B
authors.initials: MB
authors.lastname: Johnston
authors.affiliation: Clarendon Laboratory, Oxford University, Parks Road, OX1 3PU, Oxford, UK.
authors.forename: Laura M
authors.initials: LM
authors.lastname: Herz
keywords: charge diffusion length; charge-carrier recombination; perovskite solar cells; phase disorder; photovoltaics