Energy transfer from VO43− group to Sm3+ ions in Ba3(VO4)2:3xSm3+ microparticles: A bifunctional platform for simultaneous optical thermometer and safety sign

By Peng Du, Yongbin Hua, J. Yu. Chemical Engineering Journal, 2018

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Abstract The Sm3+-doped Ba3(VO4)2 microparticles were successfully synthesized via a simple sol-gel method. Both the recorded three-dimensional photoluminescence (PL) emission spectra and counter lines revealed that the near-ultraviolet light was a proper excitation lighting source for the studied samples. Under 352 nm of irradiation, the effect of Sm3+ ion concentration on the PL emission properties of the microparticles was investigated and the optimum doping concentration was demonstrated to be 4 mol%. Based on the diversity in the thermal quenching performance of VO43− group and Sm3+ ions, a novel self-referencing non-invasion optical thermometer with high sensitivity and superior signal discriminability was designed. By taking the advantage of the temperature-dependent fluorescence intensity ratio between the VO43− group and Sm3+ ions, the optical thermometric properties of the Sm3+-doped Ba3(VO4)2 microparticles in the temperature range of 303–463 K were analyzed. The maximum absolute and relative sensor sensitivities, which were hardly influenced by the PL emission intensity, were obtained to be 0.039 K−1 and 2.24% K−1, respectively. Furthermore, the emitting color of the resultant compounds was found to be significantly dependent on the external temperature. These results suggest that the Sm3+-doped Ba3(VO4)2 microparticles are a potential candidate for high-performance self-referencing optical thermometer and safety sign applications.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/18305e7b24afd358f9318fcdb95cd88d092a127e