Issue 11, 2012
From the journal:

RSC Advances

Gd2O2S:Yb,Er submicrospheres with multicolor upconversion fluorescence

Yanhua Song,ab   Yeju Huang,ab   Lihui Zhang,ab   Yuhua Zheng,ab   Ning Guoab  and  Hongpeng You*a  

* Corresponding authors

a State key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022, P.R. China
E-mail: hpyou@ciac.jl.cn

b Graduate University of the Chinese Academy of Sciences, Beijing 100049, P.R. China

Abstract

Monodisperse hexagonal-phase Gd2O2S:Yb3+,Er3+ submicrospheres have been successfully prepared for the first time by means of a solvothermal method. The SEM and TEM results show that the spherical size is between 210–300 nm and the submicrospheres are of polycrystalline nature. Under the excitation of 980 nm, the bright green emission of the Gd2O2S:Er3+ at about 524 and 548 nm are assigned to the 2H11/2→4I15/2 and 4S3/2→4I15/2 transitions of the Er3+ ions, respectively. The incorporation of Yb3+ ions into the Gd2O2S:Er3+ leads to the decrease in the intensity ratio of the green luminescence to the red luminescence. The corresponding emission color can be tuned from green to yellow by varying the Yb3+ concentration. The analysis reveals that the two-photon absorption is mainly responsible for the upconversion luminescence in Gd2O2S:Yb3+,Er3+ submicrospheres.

Graphical abstract: Gd2O2S:Yb,Er submicrospheres with multicolor upconversion fluorescence

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Article information

DOI
https://doi.org/10.1039/C2RA00009A
Article type
Paper
Submitted
04 Apr 2011
Accepted
01 Apr 2012
First published
16 Apr 2012

RSC Adv., 2012,2, 4777-4781

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Gd2O2S:Yb,Er submicrospheres with multicolor upconversion fluorescence

Y. Song, Y. Huang, L. Zhang, Y. Zheng, N. Guo and H. You, RSC Adv., 2012, 2, 4777 DOI: 10.1039/C2RA00009A

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