Structural and Optical Properties of Nanocrystalline CdO Thin Film Growth by Solid-Vapor Deposition

Abstract:

Nanocrystalline cadmium oxide (CdO) thin film was successfully synthesized by a vapor transport process (solid-vapor deposition) without catalyst. Cadmium powder was heated to 1235 K in a tube furnace, and the resultant vapor was carried to the silicon substrate zone by a flow argon gas with oxygen. Scanning electron microscopy revealed that the product was of nanocrystalline cadmium oxide. X-ray diffraction and energy dispersive X-ray techniques were used to characterize structural properties. The grown nanocrystalline thin film had a grain size of 35 nm. Photoluminescence spectroscopy was conducted to investigate the optical properties of the CdO. The red-shift direct band gap energy of the nanocrystalline CdO was at 511 nm (2.43 eV), whereas that of CdO bulk was at 491 nm (2.5 eV).

• Periodical: Advanced Materials Research (Volume 620)
• Pages: 241-245
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.620.241
• Online since: December 2012
• Authors: M. Zaien, Naser Mahmoud Ahmed, Hassan Zainuriah
• Keywords: CdO, Nanocrystalline, Solid-Vapor Deposition

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