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Effect of Eu1+ and A13+ Concentrations on Photoluminescence of Gd2O3:Eu3+
Abstract:
Gd2O3:Eu3+Al3+ phosphors are synthesized by wet chemical method and its photoluminescence properties are studied at different concentrations of Eu3+ and A13+. In emission spectra, the dominant peak observed at 611 nm corresponds to hypersensitive electric dipole transition in Eu3+. For Eu3+ concentration of 0.02, a good emission profile is observed and further its emission studies are carried out for the phosphor annealed at different temperatures and with the addition of A13+. The critical distance between the luminescent center is calculated to study the concentration quenching phenomenon. Enhancement of energy transfer occurs on introducing Al3+ in Gd2O3:Eu3+ phosphor. CIE coordinates are also calculated for Gd2O3:Eu3+ A13+ to estimate the color purity of the phosphor.
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