Luminescent thermochromism in potassium-alumina-borate glass with copper-containing molecular clusters at elevated temperatures

Emission properties and temperature dependence of Cu+ luminescence in the CaO–CaF2–P2O5 ternary glass system co-doped with CuO and SnO

“…Together with the thermal-induced quenching, the authors observed a slight red shift with increasing temperature ascribed to phonon-assisted transitions. On the other hand, significant blue shifts accompanied with band narrowing have been reported by Babkina et al [20] with increasing temperature for copper-containing potassium-alumina-borate glass. However, the authors attributed the remarkable thermochromic effects observed to a shift in energy levels of some molecular clusters.…”

“…Tunable light emission is observed as a consequence of monovalent copper and divalent tin centers stabilized in the glass matrix. Furthermore, the effect of temperature on monovalent copper emission is evaluated, as such studies are at present scarce in the literature [19,20]. Interestingly, an increase in the activation energy for the thermal quenching of Cu + PL with CaF 2 concentration is indicated.…”

Luminescent fibers with molecular clusters of silver for measuring the refractive index of the ambient medium

“…A large variety of glasses have been developed with luminescent centers in the form of molecular clusters (MCs) of silver, [13][14][15][16][17][18][19][20] MCs of copper compounds, [21][22][23][24] and MCs and quantum dots of cadmium and lead chalcogenides. [25][26][27][28] Silicate glasses with neutral silver MCs were chosen from this variety for this paper, since they are optimal in the following parameters: High chemical stability of the glass matrix, high (20-60%) quantum yield 29 of the luminescence of the silver MCs, and spectral coincidence of the luminescence band of the silver MCs with the spectral-sensitivity band of silicon photodiodes.…”

Photoluminescent temperature sensor based on borate and phosphate glasses doped with copper clusters

“…The authors explain these effects by phonon-assisted electron transitions. In [15][16][17][18][19][20][21][22] the luminescent thermochromism in metal-organic compounds with molecular clusters of copper, silver and gold was observed. It was shown in [15][16] that in [Cu 4 I 4 L 4 ]-compounds (Lorganic ligand) during the change of temperature from 8 up to 290 K a reshaping of luminescence bands from 400 nm to 580 nm takes place.…”

“…It was shown, that the rise of temperature from 77 K up to room temperature at first the red spectral shift of luminescence band by 30-50 nm takes place, and then it is changed by the blue shift with the same value. The authors of paper 21 have showed the presence of the luminescent thermochromism in potassium-alumina-borate glass with copper-containing molecular clusters at high temperatures. While heated from the room temperature to the 200°C the investigated object luminescence changed its color from red to the green one (by irradiation of 405 nm).…”