Epitaxially aligned cuprous oxide nanowires for all-oxide, single-wire solar cells

Sarah Brittman, Youngdong Yoo, Neil P. Dasgupta, Si In Kim, Bongsoo Kim, Peidong Yang

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


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 languageEnglish (US)
Pages (from-to)4665-4670
Number of pages6
JournalNano letters
Issue number8
StatePublished - Aug 13 2014


  • Copper oxide
  • epitaxy
  • heterojunction
  • nanowire
  • photovoltaics
  • solar cell


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