Haiping He et al 2003 J. Phys. D: Appl. Phys. 36 2972 doi:10.1088/0022-3727/36/23/017
Haiping He, Yuxia Wang1 and Youming Zou
Show affiliationsThe room temperature photoluminescence property of ZnO particles embedded in sol–gel silica was investigated. Three ZnO emissions at about 3.25 eV (ultraviolet (UV)), 2.8 eV (blue), and 2.45 eV (green) were observed. The blue and green emissions were ascribed to interstitial zinc and oxygen vacancy defects in ZnO. At heating temperatures above 900°C, the interaction of ZnO with SiO2 gave rise to Zn2SiO4, which enhanced the green emission markedly by limiting the oxidation process of oxygen vacancy. Heating in low oxygen pressure was found to enhance the UV emission substantially. The effects of heating temperature and ambient on blue and green emissions were also discussed.
78.55.Hx Other solid inorganic materials
61.72.J- Point defects and defect clusters
Condensed matter: electrical, magnetic and optical
Issue 23 (7 December 2003)
Received 24 June 2003
Published 19 November 2003
Haiping He et al 2003 J. Phys. D: Appl. Phys. 36 2972
T C Ferree and R C Hwa 2005 Phys. Med. Biol. 50 3927
Chun-gang Duan et al 2003 J. Phys.: Condens. Matter 15 3805
Margaret Meixner et al. 1999 ApJS 122 221
Ryutaroh Matsumoto 2003 J. Phys. A: Math. Gen. 36 8113
Paul K Townsend and Mattias N R Wohlfarth 2004 Class. Quantum Grav. 21 5375
A N F Aleixo et al 2002 J. Phys. A: Math. Gen. 35 9063
I S Heng et al 1999 Class. Quantum Grav. 16 3439
D H Bailey et al 2006 J. Phys. A: Math. Gen. 39 12271
Jonathan T. Barron et al. 2008 The Astronomical Journal 135 414