Chemical bond parameters, charge transfer band in Eu3+-activated La2Mo2O9 phosphors based on complex chemical bond theory. Issue 11 (1st August 2020)

• Record Type: Journal Article
• Authors: Zhu, Yi; Liu, Yun; Tan, Guoqiang; Liu, Wenlong; Ren, Huijun; Liu, DingHan; Bai, Shaojie; Wang, Rong; Ye, Sen
• Is Part Of: Ceramics international. Volume 46:Issue 11(2020)Part A
• Page Start: 18184
• Page End: 18192
• Publication Date: 2020-08-01
• Subjects: Eu3+-activated La2Mo2O9 -- Hydrothermal approach followed by calcination -- CTB -- Complex chemical bond theory; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.04.140
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Charge transfer band (CTB) plays an important role for the phosphors in the improvement of luminescence intensities, as low light absorption coefficient of the luminescence centers of the rare earth ions. Here, Eu 3+ -activated La2 Mo2 O9 phosphors were prepared by hydrothermal approach followed by calcination. Due to the special preparation process, the CTB of the phosphors could be effectively excited to get a very pure red emission. The structure of La2 Mo2 O9 was characterized. The field environmental factors ( h e ) of La2 Mo2 O9 :Eu 3+ crystals were calculated based on complex chemical bond theory. The light absorption property of the MoO7 8− group was studied. The results indicated that the luminescence of the CTB originated from the three parts like Eu 3+ -O 2-, α -Mo 6+ -O 2- and β -Mo 6+ -O 2- . Moreover, the FE-SEM micrographs, the photoluminescence properties and the decay time of La2 Mo2 O9 :Eu 3+ phosphors with different doping concentration were analyzed, which will further be promoting the development of the Eu 3+ -activated La2 Mo2 O9 phosphors.