Tuning the structural and optical properties in cobalt oxide-doped borosilicate glasses

The structural role and coordination environment of cobalt in 45P2O5–CaO–Na2O phosphate glasses: thermal properties and Raman, UV–vis-NIR, and EPR spectroscopy

“…[11][12][13] Their chemical durability can be tailored over orders of magnitude by modifying the chemical composition, 14,15 and therefore phosphate glasses have the potential to release Co 2+ ions at low and sustained doses. 11 On the other hand, cobalt-doped materials are also considered as potential candidates for tunable solid-state lasers, 16,17,17,18 nonlinear optical devices, 19,20 plasma display panels, 21 new inorganic pigments with a large colour scale, 22 over-heat temperature indicators, 23 and DC electrical conductivity, 24,25 among others. For this reason, there are a large number of studies on cobalt in both crystalline 18,22,23,26,27 and amorphous matrices, i.e.…”

“…For this reason, there are a large number of studies on cobalt in both crystalline 18,22,23,26,27 and amorphous matrices, i.e. glass ceramics, 19,28 silicate, 20 borate, 21,29,30 borosilicate, 17,31 and phosphate glasses. 24,25,[32][33][34] These materials have been characterised by various methods such as XRD, SEM, DSC, density, EDS, EXAFS, XANES, diffuse reflectance, UV-vis-IR absorption, Raman, luminescence, EPR, solid state NMR spectroscopy, and DC and AC conductivity analyses.…”

“…24,25,[32][33][34] These materials have been characterised by various methods such as XRD, SEM, DSC, density, EDS, EXAFS, XANES, diffuse reflectance, UV-vis-IR absorption, Raman, luminescence, EPR, solid state NMR spectroscopy, and DC and AC conductivity analyses. [17][18][19][20][21][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] Particularly, optical spectroscopy has been extensively used for structural analysis, since the colour provided by Co 2+ is related to its coordination number. 36,38 The latter varies as a function of optical basicity, a concept that is useful to explain the electron density distribution in glass networks.…”

Optical Transitions from Hexavalent Chromium in Lithium-Borate Glasses

“…Colored glasses acquired a lot of interest in commercial business as they are favored in home decoration and many other technological applications. Optical transitions between energy split d and f levels in transition metals (TM) and rare earth ions, respectively, are the main origin for color effects [1][2][3][4][5][6][7][8][9][10]. For precise and controlled tunability of glasses color, for example, it is appealing to search for suitable glass hosts capable of accommodating varies concentrations of TM ions.…”

Optical transitions from hexavalent chromium in lithium-borate glasses

“…Colored glasses acquired a lot of interest in commercial business as they are favored in home decoration and many other technological applications. Optical transitions between energy split d and f levels in transition metals (TM) and rare earth ions, respectively, are the main origin for color effects [1][2][3][4][5][6][7][8][9][10]. For precise and controlled tunability of glasses color, for example, it is appealing to search for suitable glass hosts capable of accommodating varies concentrations of TM ions.…”