title: 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.
authors.forename: Thangaraj
authors.initials: T
authors.lastname: Selvalakshmi
authors.forename: Arumugam Chandra
authors.initials: AC
authors.lastname: Bose
authors.forename: Sivan
authors.initials: S
authors.lastname: Velmathi
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D003116:Color; D005063:Europium / Q000737:chemistry*; D005682:Gadolinium / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size
chemical_list: D005063:Europium; C030581:gadolinium oxide; D005682:Gadolinium; D000535:Aluminum