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

• Published in: Applied surface science Vol. 258; no. 19; pp. 7581 - 7583
• Main Authors: No, Young Soo, Oh, Do Hyon, Kim, Su Yeon, Yoo, Keon-Ho, Kim, Tae Whan
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.07.2012; Elsevier
• Subjects: COMPOSITES; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; COPPER OXIDE; Cross-disciplinary physics: materials science; rheology; Cu2O nanocubes; DEPOSITION; Devices; ELECTRICAL PROPERTIES; ELECTRODEPOSITION; ELECTRONIC PRODUCTS; Exact sciences and technology; Glass; GLASSES; Indium tin oxide; MICA; MICROSTRUCTURES; Nanocomposites; Nanomaterials; Nanostructure; OXIDES; Physics; Structural properties; Electrical properties; Cu2O nanocubes; Structural properties; Cu; Inorganic compounds; Electrochemical method; O nanocubes; Transition element compounds; Glass; Electrodeposition; Indium; Copper oxide
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2012.04.091

► P-type Cu2O nanocubes were formed on indium-tin-oxide (ITO)-coated glass substrates without catalysts by using electrochemical deposition method. ► X-ray diffraction pattern showed that the nanocubes are in cubic phase, and photoluminescence spectra showed a dominant green band edge emission appearing at around 500nm. ► The ECD growth method had excellent advantages of simple, low cost, templateless, and mass production. ► The current–voltage characteristics for the Au/n-Al-doped ZnO (AZO)/p-Cu2O nanocube/ITO diodes showed current rectifying behavior with a turn-on voltage of 3.6V. ► These results indicate that n-AZO/p-Cu2O nanocube diodes hold promise for potential applications in next-generation optoelectronic devices. 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 3.6V.