Citation: WU Jin-Lei, SUN Jia-Shi, CAO Bao-Sheng, LI Shu-Wei, LI Shu-Wei, ZHANG Jin-Su, CHENG Li-Hong, CHEN Bao-Jiu. Upconversion Luminescence Properties of Er³⁺-Yb³⁺ Co-doped Gd₂Ti₂O₇ by Optimal Experiment Design[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(9): 1519-1525. doi: 10.11862/CJIC.2016.212 shu

Upconversion Luminescence Properties of Er³⁺-Yb³⁺ Co-doped Gd₂Ti₂O₇ by Optimal Experiment Design

WU Jin-Lei ^1,2 ,
SUN Jia-Shi ^1,*,, ,
CAO Bao-Sheng ^2,*,, ,
LI Shu-Wei ¹ ,
LI Shu-Wei ¹ ,
ZHANG Jin-Su ¹ ,
CHENG Li-Hong ¹ ,
CHEN Bao-Jiu ¹

1.
Department of Physics, Dalian Maritime University, Dalian, Liaoning 116026, China
2.
School of Physics and Materials Engineering, Dalian Nationalities University, Dalian, Liaoning 116026, China

Corresponding author: SUN Jia-Shi, sunjs@dlmu.edu.cn CAO Bao-Sheng, bscao@dlnu.edu.cn
Received Date: 5 January 2016
Revised Date: 24 April 2016

Figures(8)

Er³⁺-Yb³⁺ co-doped Gd₂Ti₂O₇ powders were prepared by Sol-gel method. The optimal experiment design theory was used to build the regression equation between the luminescent intensity and the Er³⁺-Yb³⁺ doping concentration. Calculated by genetic algorithm, the optimal concentrations of Er³⁺ and Yb³⁺ solution were 5.60% (mole percentage) and 13.43%, respectively. Er³⁺-Yb³⁺ codoped Gd₂Ti₂O₇ powders were characteristic of a typical face-centered cubic crystal phase, and the X-ray diffraction peaks shift toward higher angles with increasing Yb³⁺ concentration. Under 976 nm laser diode excitation, both green and red upconversion emissions were observed, corresponding to the Er³⁺ transitions of ²H_11/2/⁴S_3/2→⁴I_15/2 and ⁴F_9/2→⁴I_15/2. The two-photon absorption upconversion process was responsible for the green and red emissions. The effect of temperature on green and red upconversion emissions from the optimal sample was studied, indicating that the green upconversion emissions have the optimized temperature sensing properties. The temperature-dependent red upconversion emissions were interpreted by the thermal quenching theory.
- optimal experiment design,
- upconversion emission,
- sol-gel,
- Er³⁺-Yb³⁺ co-doped,
- temperature
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Upconversion Luminescence Properties of Er³⁺-Yb³⁺ Co-doped Gd₂Ti₂O₇ by Optimal Experiment Design