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  3. Crystal Structure of NaLuW2O8·2H2O and Down/Upconversion Luminescence of the Derived NaLu(WO4)2:Yb/Ln Phosphors (Ln = Ho, Er, Tm)

Crystal Structure of NaLuW2O8·2H2O and Down/Upconversion Luminescence of the Derived NaLu(WO4)2:Yb/Ln Phosphors (Ln = Ho, Er, Tm)

Описание

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1021/acs.inorgchem.8b01427

Аннотация: Hydrothermally reacting Lu(NO)3 and Na2WO4·2H2O at 200 °C and pH = 8 produced the new compound NaLuW2O8·2H2O, which was analyzed via the Rietveld technique to crystallize in the orthorhombic system (space group: Cmmm) with cell parameters a = 21.655(1), b = 5.1352(3), and c = 3.6320(2) Å and cell volume V = 403.87(4) Å3. The crystaПоказать полностьюl structure presents -(NaO6)-(NaO6)- and -(LuO4(H2O)2WO5)-(LuO4(H2O)2WO5)- alternating layers linked together by the O2- ion common to NaO6 octahedron and WO5 triangle bipyramid. Tetragonal structured and phase-pure Na(Lu0.87Ln0.03Yb0.1)(WO4)2 phosphors (Ln = Ho, Er, and Tm) were directly produced by calcining their NaLuW2O8·2H2O analogous precursors at 600 °C for 2 h, followed by a detailed study of their downconversion/upconversion (DC/UC) photoluminescence. It was shown that the UC luminescence is dominated by a red band at ∼650 nm for Ho3+ (5F5 →5I8 transition), green bands at ∼500-575 nm for Er3+ (2H11/2/4S3/2 →4I15/2 transitions) and a blue band at ∼476 nm for Tm3+ (1G4 →3H6 transition), all via a three-photon process. DC luminescence of the phosphors is characterized by a ∼545 nm green emission for Ho3+ (5F4/5S2 →5I8 transition, ex = 453 nm), ∼500-575 nm green emissions for Er3+ (2H11/2/4S3/2 →4I15/2 transitions, ex = 380 nm), and a ∼455 nm blue emission for Tm3+ (1D2 →3F4 transition, ex = 360 nm), with CIE chromaticity coordinates of around (0.27, 0.71), (0.26, 0.72), and (0.15, 0.04), respectively. Copyright © 2018 American Chemical Society.

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Издание

Журнал: Inorganic Chemistry

Выпуск журнала: Vol. 57, Is. 17

Номера страниц: 10791-10801

ISSN журнала: 00201669

Издатель: American Chemical Society

Персоны

  • Shi X. (Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang Liaoning, 110819, China, Institute for Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning, 110819, China, Research Center for Functional Materials, National Institute for Materials Science, Tsukuba Ibaraki, 305-0044, Japan)
  • Molokeev M.S. (Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation, Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
  • Wang X. (College of New Energy, Bohai University, Jinzhou Liaoning, 121007, China)
  • Wang Z. (Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang Liaoning, 110819, China, Institute for Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning, 110819, China, Research Center for Functional Materials, National Institute for Materials Science, Tsukuba Ibaraki, 305-0044, Japan)
  • Zhu Q. (Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang Liaoning, 110819, China, Institute for Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning, 110819, China)
  • Li J.-G. (Research Center for Functional Materials, National Institute for Materials Science, Tsukuba Ibaraki, 305-0044, Japan)

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