Correlation between structural and electronic order-disorder effects and optical properties in ZnO nanocrystals
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Other documents of the author: La Porta, Felipe A.; Andres, Juan; Vismara, M. V. G.; Graeff, C. F. O.; Sambrano, Julio; Li, Maximo Siu; Varela, José A.; Longo, Elson
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comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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Title
Correlation between structural and electronic order-disorder effects and optical properties in ZnO nanocrystalsAuthor (s)
Date
2014-10Publisher
Royal Society of ChemistryBibliographic citation
LA PORTA, Felipe de Almeida, et al. Correlation between structural and electronic order–disorder effects and optical properties in ZnO nanocrystals. Journal of Materials Chemistry C, 2014, 2.47: 10164-10174.Type
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Abstract
The correlation between structural and electronic order–disorder effects in understanding the optical properties of flower-like ZnO nanocrystals synthesized by the microwave-assisted hydrothermal method at low tempe ... [+]
The correlation between structural and electronic order–disorder effects in understanding the optical properties of flower-like ZnO nanocrystals synthesized by the microwave-assisted hydrothermal method at low temperatures and short times is discussed. Theoretical simulations were performed at the density functional theory level to gain a better understanding of the experimental data from X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), electron paramagnetic resonance (EPR), ultraviolet-visible diffuse reflectance (UV-vis) spectroscopy and photoluminescence (PL) measurement studies at different temperatures. The decrease in band gap values is due to the presence of intermediate states above the conduction band. These discrete levels are formed by structural and electronic disorder of tetrahedral [ZnO4] clusters which enhance the electron–hole pair. [-]
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Journal of Materials Chemistry C, 2014, 2.47Rights
© The Royal Society of Chemistry 2014
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