Single phase of BaGd0.9-xMxEu0.1B9O16（M=Al or Sc, 0≤x≤0.3） powder was prepared by the solid-state reaction and its photoluminescence（PL） properties were investigated under ultraviolet（UV） and vacuum ultraviole...Single phase of BaGd0.9-xMxEu0.1B9O16（M=Al or Sc, 0≤x≤0.3） powder was prepared by the solid-state reaction and its photoluminescence（PL） properties were investigated under ultraviolet（UV） and vacuum ultraviolet（VUV） excitation.Monitored with 613 nm emission, the excitation spectra of BaGd0.9-xMxEu0.1B9O16 consisted of three broad bands peaking at about 242, 208, and 142 nm, respectively.The one at about 242 nm originated from the charge transfer band（CTB） of O2-→Eu^3＋.The other two were assigned to the absorption of the host, which was overlapped with absorptions among borate groups, f→d transition of RE3＋（RE=Gd, Eu）, and the charge transfer transition of O2-→Gd^3＋.The maximum emission peak was observed at about 613 nm in the emission spectra of BaGd0.9-xMxEu0.1B9O16 under both 254 and 147 nm excitation, which originated from the electric dipole 5D0→7F2 transition of Eu^3＋.When excited with 254 nm, the integral emission intensity of Eu^3＋ increased after Al^3＋ or Sc^3＋ substituting Gd^3＋ partly in BaGd0.9Eu0.1B9O16.Under 147 nm excitation, the integral emission intensity of Eu^3＋ decreased after some Gd^3＋ was replaced by Sc^3＋, but increased after adding appropriate Al^3＋ into BaGd0.9Eu0.1B9O16.展开更多
基金supported by the Science Program of the Education Office, Jiangxi Province (GJJ08345)the Young Foundation of Jiangxi Univer-sity of Finance and Economy
文摘Single phase of BaGd0.9-xMxEu0.1B9O16（M=Al or Sc, 0≤x≤0.3） powder was prepared by the solid-state reaction and its photoluminescence（PL） properties were investigated under ultraviolet（UV） and vacuum ultraviolet（VUV） excitation.Monitored with 613 nm emission, the excitation spectra of BaGd0.9-xMxEu0.1B9O16 consisted of three broad bands peaking at about 242, 208, and 142 nm, respectively.The one at about 242 nm originated from the charge transfer band（CTB） of O2-→Eu^3＋.The other two were assigned to the absorption of the host, which was overlapped with absorptions among borate groups, f→d transition of RE3＋（RE=Gd, Eu）, and the charge transfer transition of O2-→Gd^3＋.The maximum emission peak was observed at about 613 nm in the emission spectra of BaGd0.9-xMxEu0.1B9O16 under both 254 and 147 nm excitation, which originated from the electric dipole 5D0→7F2 transition of Eu^3＋.When excited with 254 nm, the integral emission intensity of Eu^3＋ increased after Al^3＋ or Sc^3＋ substituting Gd^3＋ partly in BaGd0.9Eu0.1B9O16.Under 147 nm excitation, the integral emission intensity of Eu^3＋ decreased after some Gd^3＋ was replaced by Sc^3＋, but increased after adding appropriate Al^3＋ into BaGd0.9Eu0.1B9O16.
