Title: Photoluminescence properties of hollow ZnS microspheres

Authors: Yuanyuan Luo, Guanghai Li, Min Ye, Guotao Duan, Yunxia Zhang, Shusheng Pan

Addresses: Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031, China. ' Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031, China. ' Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031, China. ' Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031, China. ' Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031, China. ' Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031, China

Abstract: The photoluminescence properties of hollow ZnS microspheres with different sizes and shell thickness were studied. There exist two emission bands situated in blue and green regions in the photoluminescence spectra of the microspheres: the green band has a red shift with increasing the excitation power at different temperatures, while the blue band has a blue shift at room temperature and without any changes excited at 83 K. The green emission has a normal red shift while the blue emission shows an abnormal red-blue shift with increasing temperature. The origins of anomalous photoluminescence properties were analysed and discussed in terms of the carrier localisation at the defect levels.

Keywords: photoluminescence; hollow ZnS microspheres; zinc sulphide; carrier localisation; defects; temperature.

DOI: 10.1504/IJNP.2010.033217

International Journal of Nanoparticles, 2010 Vol.3 No.1, pp.1 - 13

Received: 09 Nov 2009
Accepted: 04 Jan 2010
Published online: 13 May 2010 *

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