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Enhanced luminescence properties of Eu 3+ in La 2 MoO 6 by nonsensitization of Bi 3 +
Author(s) -
Zhu Yi,
Liu Yun,
Tan Guoqiang,
Liu Wenlong,
Ren Huijun,
Liu DingHan,
Wang Rong,
Ye Sen,
Zhang Jin
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17585
Subject(s) - phosphor , ion , luminescence , analytical chemistry (journal) , doping , crystal structure , crystal (programming language) , quantum yield , materials science , emission spectrum , europium , chemistry , spectral line , crystallography , physics , optics , optoelectronics , fluorescence , organic chemistry , chromatography , astronomy , computer science , programming language
It was unusual for Bi 3+ ions to enhance the emission intensity of phosphors via nonsensitization. Here, La 2 MoO 6 :Eu 3+ , Bi 3+ phosphors were successfully synthesized by a high temperature solid‐state reaction method in air atmosphere. As the increase of doping concentration of Bi 3+ , the emission spectra of La 2 MoO 6 :Eu 3+ , Bi 3+ phosphors had obvious shifts, splits and the enhancement of intensities, which indicated that the characteristics of the phosphors were modified. To analyze these phenomena, the crystal structure refinements, spectral characteristic analyze and Judd‐Ofelt theoretical calculation were mainly performed. Bi 3+ ions played the role of the nonsensitizer and affected the distortion of the crystal, the sites of Eu 3+ ions, the field splitting energy and the internal quantum yield. Moreover the nephelauxetic effects of Bi 3+ ions and the ET process caused synergistically the life times of La 2 MoO 6 :Eu 3+ , Bi 3+ phosphors to increase and then gradually decrease. The CIE coordinates of phosphors changed within a small range. This study might be instrumental in promoting the further application of Bi 3+ ions in rare earth luminescent materials.