J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (4): 483-490.DOI: 10.1016/j.jmst.2018.10.018

• Orginal Article • Previous Articles     Next Articles

Effects of calcination temperature and Li+ ions doping on structure and upconversion luminescence properties of TiO2:Ho3+-Yb3+ nanocrystals

Kaishun Zouab, Guangzong Donga, Juncheng Liua*(), Boxu Xua, Danping Wanga   

  1. a School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin, 300387, China
    b School of Science, Tianjin Polytechnic University, Tianjin, 300387, China
  • Received:2017-12-12 Revised:2018-07-03 Accepted:2018-07-19 Online:2019-04-05 Published:2019-01-28
  • Contact: Liu Juncheng

Abstract:

Ho3+-Yb3+ co-doped and Ho3+-Yb3+-Li+ tri-doped TiO2 nanocrystals were prepared using the sol-gel method. Effects of the calcination temperature and Li+ ions doping on the structure and upconversion luminescence properties of Ho3+-Yb3+ co-doped TiO2 nanocrystals were investigated. The upconversion luminescence of nanocrystals was enhanced with the reduction of the crystal lattice symmetry and the crystallinity improvement of the matrix, which were facilitated by the calcination temperature change and Li+ ions doping. The lowest lattice symmetry and the best crystallinity of the matrix resulted in the maximum luminescence intensity.

Key words: Calcination temperature, Li+doping, Upconversion luminescence, TiO2 nanocrystals, Rare earth