Different origins of visible luminescence in ZnO nanostructures fabricated by the chemical and evaporation methods
By Dawei Li, Y. Leung, Aleksandra B. Djurisic, Zhengtong Liu, M. Xie, S. Shi, Shijie Xu, W. Chan. 2004
611 citations recorded by the source corpus.
We prepared ZnO nanostructures using chemical and thermal evaporation methods. The properties of the fabricated nanostructures were studied using scanning electron microscopy, x-ray diffraction, photoluminescence, and electron paramagnetic resonance (EPR) spectroscopy. It was found that the luminescence in the visible region has different peak positions in samples prepared by chemical and evaporation methods. The samples fabricated by evaporation exhibited green luminescence due to surface centers, while the samples fabricated by chemical methods exhibited yellow luminescence which was not affected by the surface modification. No relationship was found between green emission and g∼1.96 EPR signal, while the sample with yellow emission exhibited strong EPR signal.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/a657ebb77399e29f99dcf7ccefdd8522a187515a
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Citations in the corpus
- Defect emissions in ZnO nanostructures (2005, methodology): “ZnO rods were prepared from the solution of zinc nitrate hexahydrate (Zn(NO3) • 6H2O) and hexamethylenetetramine (C6H12N4), as described previously.(25) The ZnO shells were fabricated by heating Zn nanoparticles at 500 °C in an argon/oxygen mixture gas flow.”
- Probing the dominance of interstitial oxygen defects in ZnO nanoparticles through structural and optical characterizations (2014, methodology): “Generally, visible luminescence in ZnO is caused primarily by the transition from deep donor level to valance band (VB) and by the transition from CB to deep acceptor level [6,16].”