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Keywords:

  • solar cells;
  • nanowires;
  • oxide;
  • electrodeposition;
  • self-assembly
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Cu2O-ZnO nanowire solar cells are synthesized by electrodeposition from solutions near room temperature. A high-quality, self-assembling, nanostructured heterojunction is produced, which is found to dramatically improve the charge collection efficiency in these ultra-low-cost devices. Incident-photon-to-electron conversion efficiencies approaching unity are measured and considerable efficiency improvements are observed.