Optical Thermometry Based on Up‐Conversion Luminescence Behavior of Er³⁺ ‐Doped Transparent Sr₂YbF₇ Glass‐Ceramics

Abstract

Transparent novel glass-ceramics containing Sr 2 YbF 7 :Er 3+ nanocrystals were successfully fabricated by melt-quenching technique. Their structural and up-conversion luminescent properties were systemically investigated by XRD, HRTEM, and a series of spectroscopy methods. The temperature-dependent upconversion spectra prove that 2 H 11/2 and 4 S 3/2 levels of Er 3+ are thermally coupled energy levels (TCEL). Consequently, the 2

Luminescent nano-thermometer based on up-conversion luminescence behavior of transparent Ba2ErF7 nano-glass ceramics

“…co-doped PbF 2 glass ceramics [11,12], and Er 3? -doped Sr 2 YbF 7 glass ceramics [13] showed excellent sensitivity property for temperatures ranging from room to high temperatures, with the maximum sensitivity values at high temperature more than 300 K. However, these materials for thermometry failed at temperatures below 400 K temperature. Reports on optical thermometry of fluoride glass ceramics were very scarce below 400 K temperature.…”

Wide‐range thermometry based on green up‐conversion luminescence of K3LuF6:Yb3+/Er3+ bulk oxyfluoride glass ceramics

“…The signal was analyzed by EG&G 7265 DSP Lock‐in amplifier (Philadelphia, PA). The elaboration process and the characterization of structural and luminescent properties of samples are very similar to our previous work …”

Yb3+/Tb3+ co-doped GdPO4 transparent magnetic glass-ceramics for spectral conversion

“…The reason can be deduced from the UC mechanism. The UC luminescence intensity I is in proportion to the nth power of the NIR excitation intensity P, i.e., IfP n [28], where n is the number of pump photons absorbed per up-converted photon emitted. For the green emission of 543 nm, two NIR photons (975 nm) are needed, i.e., n ¼ 2, whereas only one is needed for the 1040 nm emission.…”