Optical temperature sensing behavior of Er3+/Yb3+/Tm3+:Y2O3 nanoparticles based on thermally and non-thermally coupled levels

OPTICS COMMUNICATIONS

卷:407

Article

Chen, Guangrun¹  Lei, Ruoshan¹  Huang, Feifei¹  Wang, Huanping¹  Zhao, Shilong¹  Xu, Shiqing¹ 

[1] China Jiliang Univ, Coll Mat Sci & Engn, Hangzhou 310018, Zhejiang, Peoples R China

关键词: Optical temperature sensing;    Rare earth;    Upconversion luminescence;    FIR technique;   

DOI  :  10.1016/j.optcom.2017.09.014

来源: Elsevier

【 摘 要 】

Er3+/Yb3+/Tm3+ triply doped Y2O3 nanoparticles have been synthesized by solute combustion method. X-ray diffraction (XRD) and scanning electron microscopy (SEM) demonstrate that the prepared particles are cubic Y2O3 phase with the average size of similar to 49 nm. The blue (Tm3+:(1)G(4)-> H-3(6)), green (Er3+:H-2(11/2)-> S-4(3/2)-> I-4(15/2)) and red (Er3+:F-4(9/2)-> I-4(15/2)) upconversion (UC) emissions are observed upon a 980 nm excitation. Applying the fluorescence intensity ratio (FIR) technique, the optical temperature sensing behaviors are studied based on thermally coupled levels (H-2(11/2) and(4)S(3/2) of Er3+) and non-thermally coupled levels ((1)G(4(b)) (Tm3+) and(2)H(11/2) (Er3+)), respectively. The results show that the absolute sensing sensitivity is much higher in the entire experimental temperature range, when the non-thermally coupled levels with different temperature dependences ((1)G(4(b)) (Tm3+) and(2)H(11/2) (Er3+)) are selected as the thermometric index. The maximum absolute sensitivity is found to be as high as similar to 1640x10(-4) K-1 at 573 K. This demonstrates that an optical temperature sensor with high performance can be designed based on the Er3+/Yb3+/Tm3+:Y2O3 nanoparticles. (C) 2017 Elsevier B.V. All rights reserved.

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