NIR luminescence properties of ZnS:Er,Yb quantum dots

Xiaosong Zhang; Xiaoyi Dong; Lan Li; Zhi Wang; Yange Liu; Dongqing Dong; Yanfang Zhang; Guiyun Kai

doi:10.1117/12.745821

19 November 2007 NIR luminescence properties of ZnS:Er,Yb quantum dots

Xiaosong Zhang, Xiaoyi Dong, Lan Li, Zhi Wang, Yange Liu, Dongqing Dong, Yanfang Zhang, Guiyun Kai

Proceedings Volume 6782, Optoelectronic Materials and Devices II; 67822J (2007) https://doi.org/10.1117/12.745821
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

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 ⁴I_13/2→⁴I_15/2 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 ⁵F_5/2level of the ⁴I_11/2 level (Er³⁺) and improve population accumulation on the ⁴I_11/2 level.

Citation Download Citation

Xiaosong Zhang, Xiaoyi Dong, Lan Li, Zhi Wang, Yange Liu, Dongqing Dong, Yanfang Zhang, and Guiyun Kai "NIR luminescence properties of ZnS:Er,Yb quantum dots", Proc. SPIE 6782, Optoelectronic Materials and Devices II, 67822J (19 November 2007); https://doi.org/10.1117/12.745821

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