期刊
CHEMICAL PHYSICS LETTERS
卷 423, 期 4-6, 页码 361-365出版社
ELSEVIER
DOI: 10.1016/j.cplett.2006.03.100
关键词
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Nanometer-sized ZnO particles sized from 17 nm to 110 nm were prepared by homogenous precipitation method (HPM). Photolumineseence (PL) spectra of as-prepared nanoparticles excited at 320 nm were fitted with Gaussian curves, in which six Gaussian peaks gave a good accordance with corresponding photon transitions. We observed that the relative amplitude of Gaussian combination at the lowest transition energy decreases rapidly with increased grain size. Such sensitive size-dependence shows a key role of the surface recombination in PL of nanosized structures due to large surface-to-volume ratio. The novel size dependence of PL intensity can be suitably attributed to the surface related mechanism. (c) 2006 Elsevier B.V. All rights reserved.
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