Temperature measurements using a projection to latent structures of fluorescence spectra of potassium–aluminum borate glasses with copper-containing molecular clusters

The Effect of Heat Treatment on the Optical Properties of Copper-Containing Lithium-Potassium-Borate Glasses

“…The maximum thermal effect for glass crystallization was achieved at 660 °C for the glass in which potassium was completely replaced with lithium (i.e., glass with 25 mol.% Li 2 O). Hence, as follows from DSC data, lithium promotes crystalline phase formation, this conclusion agrees the reference data [13]. Thus, one can expect that the glass annealing at proper temperatures will cause the similar crystalline phase formation.…”

“…The use of this property is important for fiber and volumetric spark sensors [8], ultraviolet dosimeters [9], white LEDs [10], and down converters for solar cells [11]. As shown in [12,13], potassium-aluminaborate glasses doped by with copper ions and clusters possess the thermochromic luminescence, the glass heating up to 200 °C results in the luminescence wavelength shift of 100 nm.…”

Single vs. mutliparametric luminescence thermometry: the case of Eu3+-doped Ba3(VO4)2 nanophosphors

“…57 Only a few papers reporting the application of dimensionality reduction methods to luminescence thermometry are known so far. [57][58][59][60][61] Recently Ximendes et al showed that linear (principal component analysis) and nonlinear (t-distributed stochastic neighbor embedding) transformation-based dimensionality reduction methods lead to comparable results in terms of the obtained thermometric performances. 57 In this work, we provide single-and multiparametric luminescence thermometry using Eu 3+ -doped Ba 3 (VO 4 ) 2 nanopowders.…”

Reducing Temperature Calibration Error in Multivariate Analysis of Fluorescence Spectra

“…Currently there are several types of fluorescent sensors for temperature calibration. They can be based on the active medium fluorescence band shift [1], fluorescence decay time change [2] and fluorescence intensity change [3] or fluorescence intensities ratio from two thermally-coupled energy levels [4] or noncoupled levels of doping ions [5], respectively. From the fluorescence spectra, only measurements at a small number of wavelengths are usually used to calibrate the temperature.…”