The effects of Ga3+ substitution on local structure and photoluminescence of Tb3Al5O12:Ce garnet phosphor

Описание

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1016/j.ceramint.2018.02.104

Ключевые слова: Crystal structure, Ga doping, Photoluminescence, TbAG:Ce

Аннотация: (Tb0.985Ce0.015)3(Al1-xGax)5O12 garnet phosphors (x = 0, 0.1, 0.2, 0.3, and 1.0) were prepared by calcining their coprecipitated precursors in air at 1500 °C, followed by reduction in hydrogen at 1200 °C. Rietveld refinement of the XRD results suggested that the Ga dopant predominantly resides at the octahedral Al site of the garneПоказать полностьюt lattice. Ga doping led to linearly expanded lattice constant, cell volume and theoretical density of the garnet compound and successively lower intensity and longer average fluorescence lifetime of the ∼ 570 nm emission of Ce3+. Blue shifted emission and 4f(2F5/2)→5d1(E2g) excitation and red shifted 4f(2F5/2)→5d2(E2g) excitation were also observed for the Ce3+ activator at a higher Ga content. The phenomena were interpreted by considering the band structure of the host, distortion of the CeO8 polyhedron, and centroid shift and field splitting of the Ce3+ 5d energy levels. © 2018 Elsevier Ltd and Techna Group S.r.l.

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Издание

Журнал: Ceramics International

Издатель: Elsevier Ltd

Авторы

  • Bi Jun (Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Liaoning, Peoples R China; Northeastern Univ, Sch Mat Sci & Engn, Inst Ceram & Powder Met, Shenyang 110819, Liaoning, Peoples R China; Kunming Inst Precious Met, State Key Lab Adv Technol Comprehens Utilizat Pla, Kunming 650106, Yunnan, Peoples R China)
  • Wang Xuejiao (Bohai Univ, Coll New Energy, Jinzhou 121013, Liaoning, Peoples R China)
  • Molokeev Maxim S. (RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 660036, Russia; Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Zhu Qi (Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Liaoning, Peoples R China; Northeastern Univ, Sch Mat Sci & Engn, Inst Ceram & Powder Met, Shenyang 110819, Liaoning, Peoples R China)
  • Li Xiaodong (Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Liaoning, Peoples R China; Northeastern Univ, Sch Mat Sci & Engn, Inst Ceram & Powder Met, Shenyang 110819, Liaoning, Peoples R China)
  • Chen Jialin (Kunming Inst Precious Met, State Key Lab Adv Technol Comprehens Utilizat Pla, Kunming 650106, Yunnan, Peoples R China)
  • Sun Xudong (Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Liaoning, Peoples R China; Northeastern Univ, Sch Mat Sci & Engn, Inst Ceram & Powder Met, Shenyang 110819, Liaoning, Peoples R China)
  • Kim Byung-Nam (Natl Inst Mat Sci, Res Ctr Funct Mat, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan)
  • Li Ji-Guang (Northeastern Univ, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Liaoning, Peoples R China; Northeastern Univ, Sch Mat Sci & Engn, Inst Ceram & Powder Met, Shenyang 110819, Liaoning, Peoples R China; Natl Inst Mat Sci, Res Ctr Funct Mat, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan)

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