Impacts of Ce3+ doping on temperature sensing characteristics of LuAG: Yb3+/Ho3+ up-conversion fluorescent materials
Source abstract
Abstract
A series of LuAG: 5 mol%Yb 3+/0.5 mol%Ho 3+/x mol%Ce 3+ (x = 0, 0.2, 0.5, 1.0, 2.0) up-conversion (UC) fluorescent materials were prepared using CO 2 laser heating zone melting method. The X-ray diffraction (XRD) patterns confirm that the prepared samples have a pure LuAG crystal phase. Under excitation of a 980 nm laser, the up-conversion luminescence (UCL) spectra of the prepared samples were obtained. Two UCL emission bands of Ho 3+ ions were observed, including green emission band of the 5F 4/ 5S 2→ 5I 8 transition, and red emission band of the 5F 5→ 5I 8 transition. Due to the cross-relaxation (CR) processes between Ce 3+ ions and Ho 3+ ions, the doping of Ce 3+ ions can effectively improve the UCL efficiency of Ho 3+ ions, and the emission intensity reaches maximum when doped with 1 mol% Ce 3+ . The temperature sensing characteristics of LuAG: Yb 3+/Ho 3+ and LuAG: Yb 3+/Ho 3+/Ce 3+ from 303 K to 723 K were studied by fluorescence intensity ratio (FIR) method. By doping 1 mol% Ce 3+ ions, the absolute sensitivity of the sample has been significantly improved, with the maximal absolute sensitivity of 0.0951 K −1 (303 K), and the maximal relative sensitivity of 0.0103 K −1 (343 K). The high sensitivity and wide measurement range make LuAG: Yb 3+/Ho 3+/Ce 3+ UCL material ideal for temperature sensing.
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Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Nanoplatforms for cancer theranostics · Luminescence and Fluorescent Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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