Journal
CHEMICAL ENGINEERING JOURNAL
Volume 255, Issue -, Pages 541-552Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2014.06.027
Keywords
Defects; White light emission; XPS; Colour tunability; TOP-SIMS
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Funding
- South African Research Chairs Initiative of the Department of Science and Technology
- National Research Foundation of South Africa
- National Laser Centre
- Cluster program of the University of the Free State
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Terbium doped Zinc oxide (ZnO:Tb3+) nano-phosphors (NPr) with a hexagonal wurtzite structure were synthesised by a solution combustion method. X-ray photoelectron spectroscopy confirmed the formation of different kind of defects for the undoped and lower Tb doping concentrations and the formation of Tb2O3 at higher doping concentrations. A broadband orange-red emission ranging from 500 to 850 nm was obtained from the undoped ZnO while white light emission was observed from ZnO doped with 5 mol% of Tb. The colour of the emission of the Zno:Tb3+ NPr was tuned by varying the concentrations of Tb3+ in the ZnO host. The ZnO:Tb3+ NPr have potential applications in solid state lighting. (C) 2014 Elsevier B.V. All rights reserved.
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