Luminescence of molecular silver clusters in oxyfluoride glasses

Effect of silver ions and clusters on the luminescence properties of Eu-doped borate glasses

“…All experimental samples here remained colorless after ion exchange, which suggests that no Ag NPs are produced during the ion diffusion process. Ag + /Ag cluster signals may be detected in optical spectra and have been investigated in a number of reports [6,7,16]. The excitation spectra of all of the samples monitored at 615 nm are illustrated in Fig.…”

“…Noble metal states in a glass matrix vary and their detection is limited by the technique employed. Kolobkova et al [7] found that luminescence and absorption spectral efficiency not only depend on REI electron transitions but also related to the metal state, which includes ions, atoms, molecules, or nanoparticles (NPs). Sliver clusters, such as Ag m (m=3-55), Ag n + (n=5-70), and silver NPs are formed easily in glasses.…”

New luminescent glasses and prospects of using them in solar energy

“…11 It should also be pointed out that a contribution can come from clusters of type Ag n O and Ag n F. Stable Ag n O (n 1 7) and Ag n F (n 2 4) clusters are described at a theoretical level in Refs. 12 and 13.…”

“…The fraction of the contribution to the luminescence from various types of clusters varies as the excitation wavelength varies. 11 Thus, oxyfluoride glasses with molecular clusters of silver make it possible to efficiently convert broad-band radiation from the 360-480-nm spectral range to the region of maximum efficiency of PECs based on α-SiC:H∕α-Si:H. The quantum luminescence yield of molecular clusters of silver can reach 60%, depending on the type of clusters. 14 An advantage of oxyfluoride glasses is that a high concentration of silver ions (up to 8 mol%) can be introduced into them.…”

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.…”