Journal
PHYSICA B-CONDENSED MATTER
Volume 579, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physb.2019.411891
Keywords
Judd-Ofelt; Photoluminescence; High-power laser; Y2O3: Eu3+; YVO4:Eu3+
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Funding
- Ministry of Education, Science, and Technological Development of the Republic of Serbia [171035, 45020]
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Judd-Ofelt analysis has been performed from the photoluminescence emission spectra of Y2O3:Eu3+ with 3%, 1% and 0.1% doping concentration and YVO4:Eu3+ with 1% doping concentration, in temperature range from 40 degrees C to 460 C. For precise calculation, an extended Sellmeier equation that accounts for the doping concentration and temperature dependence of the refractive index of Y2O3 doped with lanthanides is estimated. The temperature dependence of Omega(2) and Omega(4) parameters are fitted with quadratic and linear regression, respectively. Judd-Ofelt intensity parameters uniformly drop with increasing temperature, but at a different rate for different doping concentrations. From the Judd-Ofelt parameters radiative lifetimes and emission cross-sections were calculated. The cross-sections show a linear decrease with increasing temperature.
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