Czochralski growth of Lu_1‐xSc_xBO₃:Ce solid solution crystals

Abstract

Single crystals of Lu 1-x Sc x BO 3 :Ce (x=0.2, 0.3, 0.5, 0.7) were grown by Czochralski method. Continuous solid solution with calcite structure and a linear compositional dependency of crystal lattice parameter in the system Lu 1-x Sc x BO 3 :Ce are formed and their symmetry belong to hexagonal system with R3c space group checked by X-ray powder diffraction. The electron probe micro-analysis measurements show that the main inclusions in Lu 1-x Sc x BO 3 :Ce crystals are in the form of Sc rich oxide and Ce rich oxide. The ICP-AES tests show that the more Sc ion content in Lu 1-x Sc x BO 3 :Ce, the smaller effective segregation coefficient of Ce in crystal will be. The X-ray excited luminescence spectra of Lu 1-x Sc x BO 3 :Ce crystals all present a double peaked emission band with maxima round 370 and 400 nm corresponding to Ce 3+ emission and a self trapped excitons (STE) band peaking at 269 nm. In addition, due to high density, high relative light yield, fast decay time and no-hygroscopic property, Lu 0.8 Sc 0.2 BO 3 :1 at%Ce crystal could be a good candidate material for scintillation application by improving the crystal quality and cerium concentration.

Growth and luminescence characteristics of Pr3+-doped Lu0.8Sc0.2BO3 single crystal

“…The concentration of Pr ions in the Lu 0.8 Sc 0.2 BO 3 crystal is 0.052 at%, measured by the ICP-AES. Therefore, the segregation coefficient of Pr ions is round 0.1, smaller than the value of Ce 3+ in the same host [17]. The X-ray diffraction pattern of Lu 0.8 Sc 0.2 BO 3 :0.5 at%Pr 3+ is represented in Fig.…”

“…In our earlier work [16], the influence of Sc/Lu ratio on phase transformation and luminescence properties of Lu 1−x Sc x BO 3 :Ce solid solutions have been investigated. Moreover, the Czochalski-grown Lu 0.8 Sc 0.2 BO 3 :Ce 3+ crystal was found to be a promising material for scintillation application [17,18].…”

Luminescence characteristics of Lu0.8Sc0.2BO3:RE3+ (RE=Eu, Tb) polycrystalline powders

“…In our earlier work [23], we reported the influence of Sc/Lu ratio on phase transformation and luminescence properties of Lu 1−x Sc x BO 3 :Ce solid solutions. Moreover, the Lu 0.8 Sc 0.2 BO 3 :Ce crystal material has been obtained by Czochalski method and found to be a potential material for scintillation application [24]. Hence, in this work, we continue to explore the possibility of Eu 3+ or Tb 3+ -doped materials to be efficient scintillators.…”

Study of the effects of Ga3+ co-doping on the Lu0.8Sc0.2BO3:Ce scintillation crystals

“…In our previous work, the influence of Sc/Lu ratio on phase transformation and luminescence properties of Lu 1 À x Sc x-BO 3 :Ce solid solutions were investigated [14]. Resulting Czochalski-grown Ce-doped lutetium scandium orthoborate single crystals appeared promising scintillators [15][16][17].…”