- PII
- 10.31857/S0044457X22602280-1
- DOI
- 10.31857/S0044457X22602280
- Publication type
- Status
- Published
- Authors
- Volume/ Edition
- Volume 68 / Issue number 7
- Pages
- 913-922
- Abstract
- Orthoborates La0.95–хEu0.05SmхBO3 and metaborates La0.95 – хEu0.05Smх(BO2)3 (х = 0.025, 0.05, 0.075, 0.1) have been obtained under optimal conditions by extraction-pyrolytic method at lower temperature and shorter time as compared with the known methods. Increase in Sm3+ ion concentration leads to decrease of unit cell volume in La0.95 – хEu0.05SmхBO3 (aragonite structural type) and La0.95 – хEu0.05Smх(BO2)3 (monoclinic modification of α type). The larges changes in luminescence excitation spectra of the compounds depending on Sm3+ concentration is observed in 360–450 nm region, which includes the bands of transitions for both Eu3+ and Sm3+ ions. On luminescence excitation in the band of maximal absorption of Sm3+ ion (λeх = 404 nm), luminescence intensity of cooperatively doped La0.925Eu0.05Sm0.025(BO2)3 and La0.925Eu0.05Sm0.025BO3 increases, which can be explained by the possibility of efficient transfer of absorbed energy from Sm3+ to Eu3+ ion.
- Keywords
- экстракционно-пиролитический метод бораты лантана допирование самарием и европием люминесценция
- Date of publication
- 17.09.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 11
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