Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7839757 | Journal of Luminescence | 2018 | 10 Pages |
Abstract
A series of the Eu3+-activated Gd2W1-xMoxO6 phosphors were synthesized by a high-temperature solid-state reaction method. The phase composition, ultraviolet-visible diffuse reflectance spectra, photoluminescence and decay properties of the phosphors were investigated. Through adjusting the Mo6+ ion concentration, the excitation band of the studied sample was gradually shifted to longer wavelength. Under 376â¯nm excitation, the strong red emission at 610â¯nm and weak yellow emission centered at 591â¯nm were detected, indicating that Eu3+ occupies non-inversion symmetry sites in the host lattices. With elevating the dopant concentration, the emission intensity of synthesized products was greatly enhanced and achieved its optimum value when xâ¯=â¯0.95 which was 2.33 times higher than that of the Gd2WO6:Eu3+ compounds. The quantum efficiency of resultant samples was as high as 76.1%. Moreover, the Judd-Oflet theory was used to study the local structure environment behaviors of the Eu3+ ions in the host lattices. Finally, a red LED device, which consisted of a near-ultraviolet chip and prepared Gd2W0.05Mo0.95O6:Eu3+ phosphors, was successfully fabricated. These results confirmed that the Eu3+-doped Gd2W1-xMoxO6 phosphors have potential value as the red component for WLEDs.
Related Topics
Physical Sciences and Engineering
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Physical and Theoretical Chemistry
Authors
Junpeng Xue, Hongping Li, Hyeon Mi Noh, Byung Chun Choi, Sung Heum Park, Jung Hyun Jeong, Jung Hwan Kim,