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Table 1 The parameters of λex, λem, maximum \(S_{R}\), temperature range of the Ho3+-doped materials

From: Boltzmann- and Non-Boltzmann-Based Thermometers in the First, Second and Third Biological Windows for the SrF2:Yb3+, Ho3+ Nanocrystals Under 980, 940 and 915 nm Excitations

Samples λex (nm) λem (nm) NTCLs or TCLs Temperature range (K) \(S_{R}\)(%∙K−1) References
NaYF4: Ho3+ 447 542, 645 TCLs 113–473 0.93 (302 K) [12]
BaTiO3:Ho3+,Yb3+ 980 539, 547 TCLs 305–515 0.34 (305 K) [16]
LiYF4: Yb3+, Ho3+ 976 655, 546 TCLs 100–500 0.0129 (156 K) [30]
BiPO4:Yb3+,Ho3+ 980 652, 657 TCLs 313–573 0.079 (333 K) [31]
NBT:Ho3+,Yb3+ 980 546, 757 TCLs 93–300 0.29 (93 K) [41]
LiYb(WO4)2:Yb3+,Ho3+ 980 541, 663 TCLs 298–573 0.7 (300 K) [44]
(K0.5Na0.5)NbO3:Ho3+ 980 526, 552 TCLs 300–650 0.75 (430 K) [45]
SrF2:Yb3+,Ho3+ 980 648, 541 TCLs 303–573 0.94 (303 K) This work
1186, 1012 NTCLs 303–573 0.45 (523 K) This work
1950, 2020 NTCLs 303–573 0.40 (523 K) This work
940 648, 541 TCLs 303–573 0.57 (303 K) This work
1186, 1012 NTCLs 303–573 0.23 (303 K) This work
1950, 2020 NTCLs 303–573 0.17 (398 K) This work
915 648, 541 TCLs 303–573 0.85 (303 K) This work
1186, 1012 NTCLs 303–573 0.15 (303 K) This work
1950, 2020 NTCLs 303–573 0.24 (303 K) This work