The effect of temperature on the luminescence of molecular clusters of silver in photothermorefractive glasses

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

“…The luminescence band occupies the spectral interval 450-750 nm and has a maximum in the region λ 550 nm. Based on the results that we obtained earlier, [14][15][16][17][18] and well as based on the data shown in Refs. 31-33, it can be concluded that the contribution to the luminescence band for an excitation wavelength of 360 nm is mainly introduced by neutral MCs of Ag 2 , Ag 3 , and Ag 4 .…”

“…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.…”

The effect of ions of rare-earth metals on the temperature dependence of the luminescence of molecular clusters of silver in oxyfluoride glasses

“…[1][2][3][4] There are currently several MCs of silver known that are formed in various liquids, zeolites, glasses, and polymers. [5][6][7] The luminescence of the MCs can be used to convert radiation in fluorescent lamps, LEDs, and solar cells, as well as to create photonics devices and miniature biocompatible markers.…”

“…3 In the latter case, the subsequent reduction of the silver ions and their aggregation when they thermally diffuse ensure the formation of stable MCs.…”

“…1,3,13 It is of interest to create luminescent materials by introducing several activators that can modify both the luminescence spectrum and the absorption bands of the material. The interaction between various luminescence centers can have a resonance character, manifesting itself in excitation-energy transport from a donor (sensitizer) to an acceptor (activator).…”