Double perovskite structure CaLaMgTaO6: Bi3+, Eu3+ co-doped phosphors for optical temperature measurement

Design and synthesis of a novel blue-emitting CaNaSb2O6F:Bi3+ phosphor for optical temperature sensing

“…It can also return to their original state in the process of cooling, indicating that the phosphor is repeatable and reversible after a cycling heatcooling operation, and is obviously better than most other rare earth ion doped previously reported temperature sensors. [81][82][83][84][85][86][87][88] Beyond that, unlike the optical temperature measurement of the peak emission band of trivalent rare earth ions, the spectral region we measured shows a broad band insensitive to the measurement method, which significantly improves the stability of the measurement. The above results show that the CNSOF:0.006Bi 3+ phosphor has good repeatability of temperature determination and is a kind of non-contact optical thermometric material which is very suitable for practical applications.…”

Tunable emission and thermal sensitivity via energy transfer from Bi3+ to Eu3+ in BaY2Al2Ga2GeO12

“…2(a) shows the spectra of BYAGGO:0.09Eu 3+ , which shows the charge transfer band (CTB) between O 2− and Eu 3+ around 250 nm and the f-f transition ( 7 F 1 → 5 H 6 , 5 D 4 , 5 L 6 ) of Eu 3+ ions at 317, 360, and 392 nm. 20,21 The f-f transition of Eu 3+ ions is very sensitive to the symmetry. When Eu 3+ occupies a symmetry lattice, the emission of 5 D 0 → 7 F 1 is predominant and when Eu 3+ is in an asymmetry lattice, the transition 5 D 0 → 7 F 2 is predominant.…”

Multiple site occupancy induced yellow-orange emission in an Eu2+-doped KSr6Sc(SiO4)4 phosphor towards optical temperature sensors

“…In the temperature range of 200 to 475 K, the relative sensitivity exhibits an upward trend and reaches a maximum of 3.53% K −1 when the temperature is 475 K. It is superior to some other previously reported rare-earth ions doped optical temperature sensors. [47][48][49][50] Temperature uncertainty δT determines the temperature measurement accuracy or how small temperature difference the sensor can measure. [51][52][53] The calculated δT is portrayed in Fig.…”