Morphology controlled synthesis of Ba4Bi3F17:Er3+,Yb3+ and the dual-functional temperature sensing and optical heating applications

作者：Liu, Peng; Liu, Jiaqiang; Zhang, Youwen; Xia, Zhiguo; Xu, Yan^*

来源：Journal of Alloys and Compounds, 2020, 844: 156116.

DOI：10.1016/j.jallcom.2020.156116

• Nanothermometer
• Upconversion
• Temperature sensing
• Optical heater
• Solvothermal synthesis

Design and synthesis of new fluoride upconversion (UC) luminescent materials with controllable morphologies remains a challenge. Here, novel Ba4Bi3F17:Er3+/Yb3+ UC nanoparticles (UCNPs) were discovered and prepared using a simple one-step solvothermal strategy, and the modulation of the morphology and particle size was investigated in detail. Upon 980 nm excitation, the influence of dosage amounts of Yb3+/Er3+, and the environmental temperatures on the UC luminescent performance were studied in the temperature range of 293-393 K. The maximum relative sensitivities (Sr) of Ba4Bi3F17:1 mol%Er, 13 mol% Yb material are calculated to be 0.0122 K-1 and 0.0167 K-1 at 293 K, respectively, based on the two energetic levels of (H-2(11/2), S-4(13/2)) and (H-2(11/2), F-4(9/2)). In addition, the internal heating performance of the Ba4Bi3F17:Er3+/Yb3+ UCNPs was also evaluated in the pump power range of 112-901 mW, and the internal temperature of the UCNPs increased from 296 to 367 K with the increase of excitation power. This work initiates the discovery of the new bismuth-based fluoride nanothermometers and demonstrates the great potential for bifunctional applications in temperature sensing and optical heater devices.

• 单位
  y; 东北大学