Temperature-dependent emission color and temperature sensing behavior in Tm3+/Yb3+:Y2O3 nanoparticles

Ultraviolet and White Light Emissions from Multiphoton Upconversion Transitions in Yb/Tm/Ho Codoped Cubic Zirconia Single Crystals Excited by NIR

“…Furthermore, there is an additional UV peak at 359 nm, which corresponds to the Tm 3+ : 1 I 6 → 3 F 4 transition. The blue emission at 486 nm and the NIR emission at 780 nm have previously been attributed to the Tm 3+ : 1 G 4 → 3 H 6 and 3 H 4 → 3 H 6 transitions, respectively, ,, the red emission at around 660 nm is attributed to the Tm 3+ : 1 G 4 → 3 F 4 transition and the green bimodal emission at 534/544 nm to the Ho 3+ : 5 F 4 / 5 S 2 → 5 I 8 transitions. , Significant splitting is observed in the blue emission at around 486 nm, which is generated by the Tm 3+ : 1 G 4 → 3 H 6 transition and results from the splitting of the 1 G 4 level into three Stark levels by the crystal field of the host matrix. − …”

Comparative studies of upconversion luminescence and optical temperature sensing in Tm3+/Yb3+ codoped LaVO4 and GdVO4 phosphors

“…Such kind of observations for Tm 3+ /Yb 3+ doped systems are also reported by various researchers. 26,41,42…”

Upconversion luminescence and temperature measurement performance of Ho3+/Yb3+ and Tm3+/Yb3+ codoped Na5Rb7Sc2(WO4)9 phosphors

“…In the case of Tm 3+ , 3 F 2,3 and 3 H 4 excited levels (Δ E 21 ∼ 1750 cm −1 ), as well as two Stark components of the 1 G 4 or 3 H 4 levels (Δ E 21 ∼ 400 cm −1 ) are of interest for temperature sensing. 3,4,20–25 A variety of electronic level pairs with different Δ E 21 values allows one to make a targeted choice between activator ions and create materials with high sensing performance in the required temperature range.…”

“…3,4,[20][21][22][23][24][25] A variety of electronic level pairs with different ΔE 21 values allows one to make a targeted choice between activator ions and create materials with high sensing performance in the required temperature range.…”