Upconversion luminescence enhancement in NaYF4: Yb3+, Er3+ nanoparticles induced by Cd2+ tridoping

作者：Cong, Tie; Ding, Yadan; Yu, Xueqing; Mu, Yue; Hong, Xia^*; Liu, Yichun

来源：Materials Research Bulletin, 2017, 90: 151-155.

DOI：10.1016/j.materresbull.2017.02.032

• Nanostructures
• Inorganic compounds
• Optical materials
• Luminescence
• Solvothermal

A series of Cd2+ doped hexagonal-phase NaYF4: Yb3+, Er3+ upconversion nanoparticles (UCNPs) were synthesized via solvothermal method, and the effect of Cd2+ on the upconversion luminescence (UCL) properties was investigated in detail. It was found that the introduction of Cd2+ could enhance the UCL intensities of NaYF4: Yb3+, Er3+ UCNPs significantly. The maximum enhancement occurred when the doping concentration of Cd2+ was 7 mol%. Compared with the UCNPs without Cd2+ doping, the total integral emission intensity was enhanced by 38 times. It was related to the unit cell expansion and the generated F-vacancies, which could decrease the crystal symmetry around the Er3+ ions. The results shall facilitate the improvement of UCL properties and the potential applications of UCNPs in lighting, solar cells, optics encoding and so on.

• 出版日期2017-6
• 单位东北师范大学