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.
Original language | English (US) |
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Pages (from-to) | 4665-4670 |
Number of pages | 6 |
Journal | Nano letters |
Volume | 14 |
Issue number | 8 |
DOIs | |
State | Published - Aug 13 2014 |
Keywords
- Copper oxide
- epitaxy
- heterojunction
- nanowire
- photovoltaics
- solar cell