Intense red and green luminescence from holmium activated zinc-sulfo-boro-phosphate glass: Judd-Ofelt evaluation

Customized physical and structural features of phosphate-based glass-ceramics: role of Ag nanoparticles and Ho3+ impurities

“…Conversely, in the second case (Figure 7-b), the couplings of electrons with matrix polar phonons cloud (polaron) was weak due to the covalent type of network (known from the field strength) resulting in the observed deceased in the polaron radius and increased in the field strength. Moreover, the increased trend of polaron radius (first series) suggested the enhancement of the conduction mechanism of these glass-ceramics by the polaron hoping [31,36].…”

Self-referenced method for the Judd–Ofelt parametrisation of the Eu3+ excitation spectrum

“…Despite its low importance for Eu 3+ emission, Ω 6 is the most important parameter in the absorption/excitation spectrum, as the most intense absorption, 7 F 0 → 5 L 6 , depends solely upon its value. The Ω 6 magnitude is related to the rigidity of a medium where ions are incorporated 41,42 , which in turn depends on the Debye temperature 43,44 . Consequently, there is experimental and theoretical incompleteness of the JO parametrisation of Eu 3+ -activated materials that are not glasses, crystals, or solutions.…”

Self-referenced method for the Judd–Ofelt parametrisation of the Eu3+ excitation spectrum

“…Despite its low importance for Eu 3+ emission, Ω6 is the most important parameter in the absorption/excitation spectrum, as the most intense absorption, 7 F0→ 5 L6, depends solely upon its value. The Ω6 magnitude is related to the rigidity of a medium where ions are incorporated 39,40 , which in turn depends on the Debye temperature 41,42 .…”