title: Pr(3+)-doped beta-NaYF4 for temperature sensing with fluorescence intensity ratio technique.
abstract: Pure beta-NaYF4:0.8%Pr3+ powder sample was synthesized by the hydrothermal method. The temperature dependence of the fluorescence intensity ratio (FIR) of emission bands corresponding to the 3P1 --> 3H5 and 3P0 --> 3H5 transitions was measured in the temperature range of 120 K to 300 K excited by a 473 nm continuous wave (CW) laser. The dependence of the FIR on temperature is well fitted with an exponential function and the effective energy difference obtained is 457 cm(-1), which gives further an absolute temperature sensitivity of 0.01352 K(-1) at 300 K. The monotonous increase of FIR with temperature and high absolute temperature sensitivity demonstrate that this material can be used as temperature sensor. In addition, mono-dispersed NaYF4:1%Pr3+ nanoparticles were also synthesized.
authors.forename: Shaoshuai
authors.initials: S
authors.lastname: Zhou
authors.forename: Guicheng
authors.initials: G
authors.lastname: Jiang
authors.forename: Xiantao
authors.initials: X
authors.lastname: Wei
authors.forename: Changkui
authors.initials: C
authors.lastname: Duan
authors.forename: Yonghu
authors.initials: Y
authors.lastname: Chen
authors.forename: Min
authors.initials: M
authors.lastname: Yin