Correlation between structural and electronic order-disorder effects and optical properties in ZnO nanocrystals
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Otros documentos de la autoría: 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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Título
Correlation between structural and electronic order-disorder effects and optical properties in ZnO nanocrystalsAutoría
Fecha de publicación
2014-10Editor
Royal Society of ChemistryCita bibliográfica
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.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.rsc.org/en/Content/ArticleLanding/2014/TC/C4TC01248H#!divAbstractVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
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, 2.47Derechos de acceso
© The Royal Society of Chemistry 2014
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