Structural, optical, and electrical properties of Cu2O nanocubes grown on indium-tin-oxide-coated glass substrates by using seed-layer-free electrochemical deposition method

Electrochemical deposition was employed to fabricate Cu2O nanocubes on indium-tin-oxide (ITO)-coated glass substrates at 75 °C without using any template, catalyst, or seed layer. Scanning electron microscopy images showed that the Cu2O nanocubes with a nanoscale size were uniformly formed on ITO-coated glass substrates. X-ray patterns of the Cu2O nanocubes exhibited the dominant peaks corresponding to the Cu2O cubic structures. The current-voltage curves of an Au/n-type Al-doped ZnO/p-type Cu2O nanocube/ITO device clearly showed current rectifying behavior with a turn-on voltage of 3.6 V.