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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 887-888Size-Dependence of Photoluminescence Property of...

Size-Dependence of Photoluminescence Property of ZnO Nanoparticles

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Abstract:

Nanometer-sized ZnO crystals with the diameter from 20 nm to 110 nm were prepared by homogenous precipitation method (HPM). The photoluminescence (PL) spectra of as-prepared nanoparticles under excitation at the wavelength of 320 nm were detected. The PL spectra were fitted with Gaussian curves, in which a good fitting consisting of six Gaussian peaks was obtained. We observed that the multi-peak centers do not change much, while the relative amplitude of Gaussian combination to the band-to-band emission decreases rapidly with the increased grain size. It shows that the broadband emission at the lower energy is associated with the surface states.

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Advances in Materials and Materials Processing IV

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Advanced Materials Research (Volumes 887-888)

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143-146

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https://doi.org/10.4028/www.scientific.net/AMR.887-888.143

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Online since:

February 2014

Authors:

Xiao Fang Wang, Yun Liang Fang, Tian Le Li, Fu Juan Wang

Keywords:

Size-Dependence, Surface States, ZnO Nanoparticles

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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