One-step synthesis of ZnO nanosheets: a blue-white fluorophore
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Open Access
- 21 August 2012
- journal article
- Published by Springer Science and Business Media LLC in Nanoscale Research Letters
- Vol. 7 (1), 470
- https://doi.org/10.1186/1556-276x-7-470
Abstract
Zinc oxide is synthesised at low temperature (80°C) in nanosheet geometry using a substrate-free, single-step, wet-chemical method and is found to act as a blue-white fluorophore. Investigation by atomic force microscopy, electron microscopy, and X-ray diffraction confirms zinc oxide material of nanosheet morphology where the individual nanosheets are polycrystalline in nature with the crystalline structure being of wurtzite character. Raman spectroscopy indicates the presence of various defects, while photoluminescence measurements show intense green (centre wavelength approximately 515 nm) blue (approximately 450 nm), and less dominant red (approximately 640 nm) emissions due to a variety of vacancy and interstitial defects, mostly associated with surfaces or grain boundaries. The resulting colour coordinate on the CIE-1931 standard is (0.23, 0.33), demonstrating potential for use as a blue-white fluorescent coating in conjunction with ultraviolet emitting LEDs. Although the defects are often treated as draw-backs of ZnO, here we demonstrate useful broadband visible fluorescence properties in as-prepared ZnO.Keywords
This publication has 48 references indexed in Scilit:
- Cobalt-doped ZnO nanowires on quartz: Synthesis by simple chemical method and characterizationJournal of Crystal Growth, 2012
- A phosphor-free white light-emitting diode using In2O3 : Tb transparent conductive light converterJournal of Physics D: Applied Physics, 2011
- Preparation of white light emitting YVO4: Ln3+ and silica-coated YVO4:Ln3+ (Ln3+ = Eu3+, Dy3+, Tm3+) nanoparticles by CTAB/n-butanol/hexane/water microemulsion route: Energy transfer and site symmetry studiesJournal of Materials Chemistry, 2011
- Solvothermally grown Ce3+-doped Y3Al5O12colloidal nanocrystals: spectral variations and white LED characteristicsJournal of Physics D: Applied Physics, 2010
- Fabrication Methods and Luminescent Properties of ZnO Materials for Light-Emitting DiodesMaterials, 2010
- Highly Stabilized Monodispersed Citric Acid Capped $\hbox{ZnO:Cu}^{2+}$ Nanoparticles: Synthesis and Characterization for Their Applications in White Light Generation From UV LEDsIEEE Transactions on Nanotechnology, 2010
- Synthesis and Characterization of ZnO Nanowire–CdO Composite NanostructuresNanoscale Research Letters, 2009
- Hydrothermal synthesis of phosphate-mediated ZnO nanosheetsMaterials Letters, 2009
- White light emitting diode synthesis using near ultraviolet light excitation on Zinc oxide–Silicon dioxide nanocompositeScripta Materialia, 2008
- White-light emission from a blend of CdSeS nanocrystals of different Se:S ratioNanotechnology, 2007