Tailoring the local lattice distortion of Nd³⁺ by codoping of Y³⁺ through first principles calculation for tuning the spectroscopic properties

Neodymium Cluster Evolution in Fluorite Laser Crystal: A Combined DFT and Synchrotron X-ray Absorption Fine Structure Study

“…The triangle denoted absorption starts to emerge when doped with 0.23% Nd 3+ which is close to the starting aggregating concentration. The triangle denoted absorption is then assigned to the cubic sublattice clusters, while the square antiprism structure clusters contribute to the asterisk denoted absorptions. − The absorptions are in line with the varied cluster formation energies and structures.…”

Modelling and analyzing the glass-like heat transfer behavior of rare-earth doped alkaline earth fluoride crystals

“…The huge divergence of the microstructure (cluster) results in the variation of the lattice distortion and system disorder degree, thus generating differentiated thermal conductivities in different fluoride systems. 22,36,[41][42][43][44][45][46] As shown in Fig. 11, with the increase of the atomic number, and Yb:CaF 2 with doping concentration higher than 1 at%.…”

“…Due to the discontinuous lattice vibration near the defective structure, the amplitude of local vibration near the defects gradually weakens when the doping concentration improves, accompanied by the increase of the defects and phonon scattering coefficient, which results in the decline of thermal conductivity. 35,36 Hence, the thermal conductivity drops along with the increasing doping concentration of Yb 3+ at the same temperature (Fig. 2).…”

“…The huge divergence of the microstructure (cluster) results in the variation of the lattice distortion and system disorder degree, thus generating differentiated thermal conductivities in different fluoride systems. 22,36,41–46 As shown in Fig. 11, with the increase of the atomic number, the mass of RE ions increases, while the effective radius of ions declines, which improves the complexity and assembling probability of clusters.…”

Luminescence properties of Gd(CO3)OH spherical particles with prospects for CL microscopic analysis and multi-color displays

“…After co-doping, the intensity of both rare earth ions increased first, which was due to the improvement of luminous efficiency caused by lattice distortion. [34][35][36] Owing to the energy overlap, the 5 D 4 -7 F 5 emission energy of Tb 3+ could be directly transferred to the 7 F 0 -5 D 0 excitation of Eu 3+ , leading to the luminance reduction of Tb 3+ and increase of Eu 3+ later, along with the change of emitting color macroscopically. However, the increase of the Eu 3+ content not only improves the energy transfer (ET) efficiency, but also produces the concentration quenching (CQ) effect, and there is a competitive relationship between the two of them.…”