Photoluminescence of BaGdB9O16:Eu3+ co-doped Al3+ or Sc3+ under UV-VUV excitation
来源期刊：Journal of Rare Earths2009年第1期
论文作者：李小侠 张占辉 陈忠 王育华 黄新阳 于泉茂 吕兴栋
文章页码：38 - 42
摘 要：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-→Eu3+.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-→Gd3+.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 Eu3+.When excited with 254 nm, the integral emission intensity of Eu3+ increased after Al3+ or Sc3+ substituting Gd3+ partly in BaGd0.9Eu0.1B9O16.Under 147 nm excitation, the integral emission intensity of Eu3+ decreased after some Gd3+ was replaced by Sc3+, but increased after adding appropriate Al3+ into BaGd0.9Eu0.1B9O16.
李小侠1,2，张占辉3，陈忠1，王育华2，黄新阳1，于泉茂1，吕兴栋1
1. School of Electronics, Jiangxi University of Finance & Economics2. Department of Materials Science, School of Physical Science and Technology, Lanzhou University3. School of Materials Science of Engineering, Wuhan Institute of Technology
摘 要：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-→Eu3+.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-→Gd3+.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 Eu3+.When excited with 254 nm, the integral emission intensity of Eu3+ increased after Al3+ or Sc3+ substituting Gd3+ partly in BaGd0.9Eu0.1B9O16.Under 147 nm excitation, the integral emission intensity of Eu3+ decreased after some Gd3+ was replaced by Sc3+, but increased after adding appropriate Al3+ into BaGd0.9Eu0.1B9O16.
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