title: Epitaxially aligned cuprous oxide nanowires for all-oxide, single-wire solar cells.
abstract: As a p-type semiconducting oxide that can absorb visible light, cuprous oxide (Cu2O) is an attractive material for solar energy conversion. This work introduces a high-temperature, vapor-phase synthesis that produces faceted Cu2O nanowires that grow epitaxially along the surface of a lattice-matched, single-crystal MgO substrate. Individual wires were then fabricated into single-wire, all-oxide diodes and solar cells using low-temperature atomic layer deposition (ALD) of TiO2 and ZnO films to form the heterojunction. The performance of devices made from pristine Cu2O wires and chlorine-exposed Cu2O wires was investigated under one-sun and laser illumination. These faceted wires allow the fabrication of well-controlled heterojunctions that can be used to investigate the interfacial properties of all-oxide solar cells.
authors.affiliation: Department of Chemistry, University of California , Berkeley, California 94720, United States.
authors.forename: Sarah
authors.initials: S
authors.lastname: Brittman
authors.forename: Youngdong
authors.initials: Y
authors.lastname: Yoo
authors.forename: Neil P
authors.initials: NP
authors.lastname: Dasgupta
authors.forename: Si-in
authors.initials: SI
authors.lastname: Kim
authors.forename: Bongsoo
authors.initials: B
authors.lastname: Kim
authors.forename: Peidong
authors.initials: P
authors.lastname: Yang