Temperature and rhodamine B sensing based on fluorescence intensity ratio of Er3+ upconversion emissions

Jin L. Wu; Bao S. Cao; Luis Rino; Yang Y. He; Zhi Q. Feng; Bin Dong

doi:10.1039/C7RA09977K

Temperature and rhodamine B sensing based on fluorescence intensity ratio of Er³⁺ upconversion emissions†

Jin L. Wu,^a Bao S. Cao,

*^ab Luis Rino,

^b Yang Y. He,^a Zhi Q. Feng^a and Bin Dong*^a

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* Corresponding authors

^a Key Laboratory of Photosensitive Material and Device of Liaoning Province, Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, School of Physics and Materials Engineering, Dalian Minzu University, Dalian 116600, P. R. China
E-mail: bscao@dlnu.edu.cn, dong@dlnu.edu.cn

^b Department of Physics & I3N, University of Aveiro, Campus Universitário de Santiago, Aveiro 3810-193, Portugal

Abstract

In this paper, we report the temperature and rhodamine B (RhB)-concentration sensing behavior of Ag/ZnO/Er³⁺:YbMoO₄ composite films based on the fluorescence intensity ratio (FIR) of two green upconversion (UC) emissions which are ascribed to the ²H_11/2/⁴S_3/2 → ⁴I_15/2 transitions of Er³⁺. Through the strong and non-overlapping green UC emissions, the FIR of the two green emissions is closely related to temperature in the range of 300–650 K, which shows a high sensing accuracy and the maximum sensitivity of 0.01574 K⁻¹. Due to the wavelength-dependent absorption of dye molecules, the FIR of the two green UC emissions exhibits an excellent exponential relationship with the RhB concentration in the range of 0–1000 ppm, which is ascribed to the radiative energy transfer (RET) from the composite film to RhB molecules. It is anticipated that the FIR technique based on the UC luminescence of rare-earth ions is a potential method for multifunctional application both in thermometers and biosensors.

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DOI: https://doi.org/10.1039/C7RA09977K
Article type: Paper
Submitted: 07 Sep 2017
Accepted: 09 Oct 2017
First published: 16 Oct 2017
This article is Open Access

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RSC Adv., 2017,7, 48494-48500

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Temperature and rhodamine B sensing based on fluorescence intensity ratio of Er³⁺ upconversion emissions

J. L. Wu, B. S. Cao, L. Rino, Y. Y. He, Z. Q. Feng and B. Dong, RSC Adv., 2017, 7, 48494 DOI: 10.1039/C7RA09977K

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Temperature and rhodamine B sensing based on fluorescence intensity ratio of Er³⁺ upconversion emissions†

Abstract

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Temperature and rhodamine B sensing based on fluorescence intensity ratio of Er³⁺ upconversion emissions

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