Study on Spectra of La2CaB10O19∶Eu3+ in VUV-VIS Range

稀土学报(英文版), 2004, 22(3): 361-364.

赫泓 ^1, , 于英宁 ^2, , 梁宏斌 ^3, , 王淑彬 ^4, , 苏锵 ^5, , 陶冶 ^6,

1.Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

2.Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

3.State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China

4.Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

5.Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineer

6.Laboratory of Beijing Synchrotron Radiation, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China

基金项目: 国家重点基础研究发展计划(973计划)(G1998061312) the Foundation of Laboratory of Beijing Synchrotron Radiation, Institute of High Energy Physics, Chinese Academy of Sciences(01049)

Study on Spectra of La2CaB10O19∶Eu3+ in VUV-VIS Range

Keywords： chemical analysis

Excitation and emission spectra of new borate La2CaB10O19 doped Eu3+ in VUV-VIS range, high resolution emission spectra at room temperature and lifetime of Eu3+ were investigated. The emission line at about 616 nm attributed to the 5D0-7F2 transition of Eu3+ is the most intense emission of Eu3+. The broad band at about 244 nm is originated from charge transition band (CTB) of O2-→Eu3+. According to the numbers of spectral lines 5D0-7F0 and 5D0-7F1 in high-resolution spectrum, Eu3+ ions occupy two crystallographic sites. The lifetimes of 5D0-7F0 transition of Eu3+ of two kinds of lattice sites are individually 2.1 and 2.6 ms, and both are exponential decay. In the VUV excitation spectrum, complicated band between 130 and 170 nm consists of host absorption and f-d transition of Eu3+.

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Study on Spectra of La2CaB10O19∶Eu3+ in VUV-VIS Range

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