成果归属作者：

夏志国 ; 廖立兵

成果归属机构：

材料科学与工程学院

作者：

Xia, Zhiguo ; Wang, Xiaoming ; Wang, Yingxia ; Liao, Libing ; Jing, Xiping

单位：

China Univ Geosci, Sch Mat Sci & Technol, Beijing 100083, Peoples R China;Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China

摘要：

A new family of chloroborate compounds, which was investigated from the viewpoint of rare earth ion activated phosphor materials, have been synthesized by a conventional high temperature solid-state reaction. The crystal structure and thermally stable luminescence of chloroborate phosphors Ba(2)Ln(BO3)(2)Cl:Eu2+ (Ln = Y, Gd, and Lu) have been reported in this paper. X-ray diffraction studies verify the successful isomorphic substitution for Ln(3+) sites in Ba(2)Ln(BO3)(2)Cl by other smaller trivalent rare earth ions, such as Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb. The detailed structure information for Ba(2)Ln(BO3)(2)Cl (Ln = Y, Gd, and Lu) by Rietveld analysis reveals that they all crystallize in a monoclinic P2(1)/m space group. These compounds display interesting and tunable photoluminescence (PL) properties after Eu2+-doping. Ba(2)Ln(BO3)(2)Cl:Eu2+ phosphors exhibit bluish-green/greenish-yellow light with peak wavelengths at 526,548, and 511 nm under 365 UV light excitation for Ba2Y(BO3)(2)Cl:Eu2+, Ba2Gd(BO3)(2)Cl: Eu2+, and Ba2Lu(BO3)(2)Cl:Eu2+, respectively. Furthermore, they possess a high thermal quenching temperature. With the increase of temperature, the emission bands show blue shifts with broadening bandwidths and slightly decreasing emission intensities. It is expected that this series of chloroborate phosphors can be used in white-light UV-LEDs as a good wavelength-conversion phosphor.

基金：

National Natural Science Foundations of China [51002146]; Ph.D. Programs Foundation of Ministry of Education of China [20090022120002]; Fundamental Research Funds for the Central Universities [2010ZY35, 2011YXL005]; State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences [RERU2011014]

语种：

英文

DOI：

10.1021/ic200988w

来源：

INORGANIC CHEMISTRY,2011(20):10134-10142.

出版日期：

2011-10-17

提交日期：

2017-12-14

引用参考：

Xia, Zhiguo; Wang, Xiaoming; Wang, Yingxia; Liao, Libing; Jing, Xiping. Synthesis, Structure, and Thermally Stable Luminescence of Eu2+-Doped Ba(2)Ln(Bo(3))(2)Cl (Ln = Y, Gd and Lu) Host Compounds[J]. INORGANIC CHEMISTRY,2011(20):10134-10142.