Decay pathway and high-temperature luminescence of Eu3+ in Ca2Gd8Si6O26

The thermal stability and structural site-distribution of Eu3+ ions in the red-emitting phosphors Ca9Eu2W4O24 and Sr9Eu2W4O24

“…Recently, Chambers et al [24] investigated the temperaturedependent luminescence of Eu 3+ doped Ca 2 Gd 8 Si 6 O 26 and its decay pathways. They suggested that the decay from 5 D 0 was primarily through a CTS route; and the decay from 5 D 1 might be more complex and include some contribution from MPR-based relaxation.…”

Blue and green emissions with high color purity from nanocrystalline Ca2Gd8Si6O26:Ln (Ln = Tm or Er) phosphors

“…Among the many synthetic oxyapatites, the ternary rare-earth-metal silicate with the oxyapatite structure of the form Ca 2 RE 8 Si 6 O 26 (RE = Y/Gd) is an efficient host lattice for the luminescence of various RE 3+ activator ions and mercury like ions. This oxyapatite host lattice consists of two cationic sites, that is, the 9-fold coordinated 4f sites with C 3 point symmetry and 7-fold coordinated 6h sites with Cs point symmetry [15,16]. Both sites are suitable and can easily accommodate a great variety of RE 3+ ions.…”

Spectral and thermal properties of Dy3+-doped NaGdTiO4 phosphors

“…After excluding the above two possible mechanisms of fluorescence temperature quenching, the crossover process should be checked to find the physical nature of temperature dependent fluorescence quenching of Dy 3+ . Besides, it has been widely observed and extensively studied in Eu 3+ -doped luminescent materials [29,[32][33][34]. In fact, the crossover quenching is a thermal activation process in which the relationship between luminescence intensity and sample temperature can be described as the following equation [35]:…”