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Proceedings Paper

NIR luminescence properties of ZnS:Er,Yb quantum dots
Author(s): Xiaosong Zhang; Xiaoyi Dong; Lan Li; Zhi Wang; Yange Liu; Dongqing Dong; Yanfang Zhang; Guiyun Kai
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Paper Abstract

Free-standing ZnS:Er and ZnS:Er,Yb quantum dots were prepared in the aqueous medium from readily available precursors. The construction, morphology and luminescence properties of the ZnS:Er and ZnS:Er,Yb quantum dots were evaluated by XRD,TEM and photoluminescence spectra. The average particle size was calculated using the Scherrer formula to be 4nm, which is also observed from HRTEM image. The spectra of ZnS:Er and ZnS:Er,Yb quantum dots have broad emission between 1450 nm and 1650 nm centered at 1575 nm with the excitation wavelength 980 nm, which can be attributed to the 4I13/24I15/2 transition. But the intensity of ZnS:Er,Yb quantum dots significantly increases with the addition of Yb as a sensitizing ion into ZnS:Er quantum dots. Because that Yb3+ absorbed the energy and transfer energy from the 5F5/2 level of the 4I11/2 level (Er3+ ) and improve population accumulation on the 4I11/2 level.

Paper Details

Date Published: 19 November 2007
PDF: 6 pages
Proc. SPIE 6782, Optoelectronic Materials and Devices II, 67822J (19 November 2007); doi: 10.1117/12.745821
Show Author Affiliations
Xiaosong Zhang, Nankai Univ. (China)
Tianjin Univ. of Technology (China)
Xiaoyi Dong, Nankai Univ. (China)
Lan Li, Tianjin Univ. of Technology (China)
Zhi Wang, Nankai Univ. (China)
Yange Liu, Nankai Univ. (China)
Dongqing Dong, Tianjin Univ. of Technology (China)
Yanfang Zhang, Tianjin Univ. of Technology (China)
Guiyun Kai, Nankai Univ. (China)

Published in SPIE Proceedings Vol. 6782:
Optoelectronic Materials and Devices II
Yoshiaki Nakano, Editor(s)

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