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

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2019,（4）
• 页码范围: 483-490
• 页数: 8页
• 语种: 英文

摘要

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.