Structural evolution and visible photoluminescence of Zn-ZnO nanophosphor

✍ Scribed by Ghosh, Avijit ;Choudhary, R. N. P.

• Book ID: 105365105
• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 492 KB
• Volume: 206
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200824407

✦ Synopsis

Abstract

The Zn–ZnO nanostructure thin films are prepared by an inexpensive vacuum arc‐discharge method combined with vacuum annealing. The structural analysis of the grazing‐incidence X‐ray diffraction pattern using the Rietveld method showed the formation of Zn–ZnO in a single phase. The coexistence of Zn and ZnO in the thin‐film sample was also confirmed using transmission electron microscopy technique. Studies of optical properties by photoluminescence (PL) spectroscopy exhibit a strong violet emission accompanied by weak blue and green emission. The origin of defect emission of Zn–ZnO nanostructure was analyzed. Thus, the existence of metallic Zn nanocrystals embedded in ZnO islands provides a considerable change in the PL mechanism. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)