Upconversion luminescence, temperature sensing and internal heating behaviors of Er3+/Yb3+/Fe3+-tridoped NaBiF4 nanoparticles

摘要

Series of Er3+/Yb3+/Fe-3+-tridoped NaBiF4 nanoparticles were synthesized through a simple precipitation reaction method at room temperature. The effect of the Fe3+ ions on the microstructure and upconversion (UC) luminescence properties of the developed samples were studied in detail. Through the Fe3+ ions doping engineering, the enhancement in both green and red UC emission intensities were observed and the optimal doping concentration for Fe3+ ions was revealed to be 30 mol%. Owing to the fluorescence intensity ratio technology, the optical thermometric performances of the resultant products in the temperature range of 303-543 K were investigated and the maximum sensor sensitivity of the studied nanoparticles was 0.0053 K-1 at 543 K. Moreover, the internal heating behaviors of the obtained nanoparticles were investigated and the product temperature was improved to 399 K when the pump power was set at 260 mW. Our systematic and complementary studies suggested that the Er3+/Yb3+/Fe3+-tri-doped NaBiF4 nanoparticles with splendid UC behaviors were poised as next-generation promising candidates for nanothermometer and optical heaters. (C) 2019 Published by Elsevier B.V.