Fabrication, optical and scintillation properties of transparent YAG:Ce ceramics

Ce:YAG ceramics: the influence of the synthesis technology features on the luminescent and the optical properties

“…The ceramic general flow chart is presented in table 1. The samples of the transparent Се 3+ :YAG ceramics were fabricated from our own production-received nanopowders Al 2 4 Si) of 0.5 wt.% (0.14 wt.% SiO 2 ) was used as a sintering aid in all samples. After that, the mix was evaporated in the rotational vacuum evaporator and was annealed at 600 °C for 3 hours to remove the alcohol fragments.…”

“…It is evident from the figure that all the samples exhibit an intense luminescence with a band maximum at the 525-538 nm region corresponding to the radiative d-f transitions ( the dopant in the samples leads to the maximum shift of the luminescence spectrum from 525 to 538 nm. In the 240-460 nm region, a luminescence band associated with the decay of the self-trapped excitons (STE) in the YAG host [8]. The complex shape of the STE band is due to the presence of the absorption bands from Ce 3+ in this region.…”

“…The ceramic technology holds out the high-transparent and the large-size garnet materials production opportunity at the lower temperatures and the homogeneous distribution or the gradient-controlled activator ions distribution [2,3]. In this paper, we are mainly presenting the dependence between the research results on the optical and the luminescent properties of one of the known scintillation ceramic materials, namely, the aluminum-yttrium garnet Y 3 Al 5 O 12 activated by Се 3+ (Се 3+ :YAG) with the Се 3+ dopant concentration of 0.1 and 1 at.% on the synthesis technology features.…”

Synthesis and sintering of nanocrystalline Ce3+ - doped yttria nanoparticles prepared by precipitation method

“…It was reported that the excitation and emission spectra of Ce 3+ -doped compounds mainly depend on the crystalline environment around the Ce 3+ ions [45,46]. It is well established that when Ce 3+ is localised in a single lattice site, the asymmetry in the emission of Ce 3+ corresponds to the transitions from the lowest 5d excited state to the 2 F 5/2 and 2 F 7/2 spin-orbit split of 4f ground states [47,48]. Figure 9b shows the normalized emission intensities.…”

Eu3+‐doped glass as a color rendering index enhancer in phosphor‐in‐glass

“…However, heat generated from high-power LEDs may lead to yellowing, carbonization, and browning of the encapsulant 2,3 and thus change the color temperature of the WLED and decrease its luminous efficacy. Different techniques have emerged to overcome these drawbacks, among these we find approaches such as glass-ceramics, [4][5][6][7][8] and phosphor in glass (PIG). [9][10][11][12][13][14][15][16][17][18][19] A PIG is formed by mixing a transparent glass powder with a phosphor material, and then the green body is sintered at a certain temperature, usually below 800°C.…”