This article is cited in 15 papers

Communications

Upconversion luminescence and ratiometric temperature sensing behavior of Er³⁺/Yb³⁺-codoped CaY₂Ge₃O₁₀ germanate

O. A. Lipina, L. L. Surat, A. Yu. Chufarov, A. P. Tyutyunnik, V. G. Zubkov

Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russian Federation

Abstract: A new series of CaY_2–10xYb_9xEr_xGe₃O₁₀ trigermanates (space group P2₁/c, Z=4) has been synthesized using an EDTA-assisted method. Under 980nm laser diode excitation, the samples exhibit intense upconversion luminescence corresponding to the characteristic transitions ²H_9/2→⁴I_15/2 (400–420nm), ²H_11/2,⁴S_3/2→⁴I_15/2 (500–600nm) and ⁴F_9/2→⁴I_15/2 (625–725nm) in Er³⁺ ions. The CaY_1.5Yb_0.45Er_0.05Ge₃O₁₀ phosphor can be used as a good temperature sensor with high absolute and relative sensitivities S_a(max)=0.0051 K⁻¹ and S_r(max)=0.0109 K⁻¹.

Keywords: luminescence, phosphors, temperature sensing, germanates, erbium.

Language: English

DOI: 10.1016/j.mencom.2021.01.035

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