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Czochralski growth of Lu1-xScxBO3:Ce solid solution crystals

✍ Scribed by Y. T. Wu; D. Z. Ding; S. K. Pan; F. Yang; G. H. Ren

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
214 KB
Volume
46
Category
Article
ISSN
0232-1300

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✦ Synopsis

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.

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