Effects of composition modulation on the luminescence properties of Eu3+ doped Li1−xAgxLu(MoO4)2 solid-solution phosphors. Issue 41 (29th September 2015)

• Record Type: Journal Article
• Authors: Cheng, Fangrui; Xia, Zhiguo; Molokeev, Maxim S.; Jing, Xiping
• Is Part Of: Dalton transactions. Volume 44:Issue 41(2015)
• Page Start: 18078
• Page End: 18089
• Publication Date: 2015-09-29
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c5dt02760h
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The composition, structural evolution and luminescence properties of double molybdate scheelite-type solid-solution phosphors Li1− x Ag x Lu1− y (MoO4 )2 : y Eu 3+ have been studied. Abstract : Double molybdate scheelite-type solid-solution phosphors Li1− x Ag x Lu1− y (MoO4 )2 : y Eu 3+ were synthesized by the solid state reaction method, and their crystal structures and luminescence properties were investigated in detail. The composition modulation and structural evolution of this series of samples were studied and the selected AgEu(MoO4 )2, AgLu(MoO4 )2, LiLu(MoO4 )2 and LiEu(MoO4 )2 phases were analyzed based on the Rietveld refinement. Depending on the variation of the Li/Ag ratio in Li1− x Ag x Lu1− y (MoO4 )2 : y Eu 3+ phosphors, the difference in the luminescence properties of Li1− x Ag x Lu1− y (MoO4 )2 : y Eu 3+ phosphors was ascribed to two factors, one reason could be assigned to the coupling effect and the nonradiative transition between the energy levels of Li x Ag1− x Lu(MoO4 )2 matrices and the activator Eu 3+, another could be due to the near ultraviolet energy absorption and transmission efficiency between the charge-transfer (CT) band of O 2− –Mo 6+ and the 4f → 4f emissive transitions of Eu 3+ . The ultraviolet-visible diffuse reflection spectra (UV-vis DRS) and Raman spectra analysis were also used to verify the above mechanism.