title: Hole-transport materials with greatly-differing redox potentials give efficient TiO2-[CH3NH3][PbX3] perovskite solar cells.
abstract: Two diacetylide-triphenylamine hole-transport materials (HTM) with varying redox potential have been applied in planar junction TiO2-[CH3NH3]PbI3-xClx solar cells leading to high power-conversion efficiencies up to 8.8%. More positive oxidation potential of the HTM gives higher VOC and lower JSC illustrating the role of matching energy levels, however both HTMs gave efficient cells despite a difference of 0.44 V in their redox potentials.
authors.affiliation: Department of Physics, University of Oxford, Oxford, OX1 3PU, UK.
authors.forename: Antonio
authors.initials: A
authors.lastname: Abate
authors.forename: Miquel
authors.initials: M
authors.lastname: Planells
authors.forename: Derek J
authors.initials: DJ
authors.lastname: Hollman
authors.forename: Vishal
authors.initials: V
authors.lastname: Barthi
authors.forename: Suresh
authors.initials: S
authors.lastname: Chand
authors.forename: Henry J
authors.initials: HJ
authors.lastname: Snaith
authors.forename: Neil
authors.initials: N
authors.lastname: Robertson