title: Pressure-Stimulated Synthesis and Luminescence Properties of Microcrystalline (Lu,Y)₃Al₅O₁₂:Ce³⁺ Garnet Phosphors.
abstract: The Lu2.98Ce0.01Y0.01Al5O12 and Y2.99Ce0.01Al5O12 phosphors were synthesized by solid state reaction at temperature 1623 K and pressure 1.5 × 10(7) Pa in (95% N2 + 5% H2) atmosphere. Under the conditions, the compounds crystallize in the form of isolated euhedral partly faceted microcrystals ∼19 μm in size. The crystal structures of the Lu2.98Ce0.01Y0.01Al5O12 and Y2.99Ce0.01Al5O12 garnets have been obtained by Rietveld analysis. The photoluminescence (PL) and X-ray excited luminescence (XL) spectra obtained at room temperature indicate broad asymmetric bands with maxima near 519 and 540 nm for Y2.99Ce0.01Al5O12 and Lu2.98Ce0.01Y0.01Al5O12, respectively. The light source was fabricated using the powder Lu2.98Ce0.01Y0.01Al5O12 phosphor and commercial blue-emitting n-UV LED chips (λ(ex) = 450 nm). It is found that the CIE chromaticity coordinates are (x = 0.388, y = 0.563) with the warm white light emission correlated color temperature (CCT) of 6400 K and good luminous efficiency of 110 lm/W.
authors.affiliation: Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences , Novosibirsk 630090, Russia.|Functional Electronics Laboratory, Tomsk State University , Tomsk 634050, Russia.|Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University , Novosibirsk 630090, Russia.
authors.forename: Victor V
authors.initials: VV
authors.lastname: Atuchin
authors.affiliation: Analytical Laboratory, Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences , Novosibirsk 630090, Russia.|Department of Natural Sciences, Novosibirsk State University , Novosibirsk 630090, Russia.
authors.forename: Nina F
authors.initials: NF
authors.lastname: Beisel
authors.affiliation: Department of Applied Physics, Novosibirsk State University , Novosibirsk 630090, Russia.
authors.forename: Eugeniy N
authors.initials: EN
authors.lastname: Galashov
authors.affiliation: Department of Applied Physics, Novosibirsk State University , Novosibirsk 630090, Russia.
authors.forename: Egor M
authors.initials: EM
authors.lastname: Mandrik
authors.affiliation: Laboratory of Crystal Physics, Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences , Krasnoyarsk 660036, Russia.|Department of Physics, Far Eastern State Transport University , Khabarovsk 680021, Russia.
authors.forename: Maxim S
authors.initials: MS
authors.lastname: Molokeev
authors.affiliation: Laboratory of High Pressure Minerals and Diamond Deposits, Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences , Novosibirsk 630090, Russia.
authors.forename: Alexander P
authors.initials: AP
authors.lastname: Yelisseyev
authors.affiliation: Department of Applied Physics, Novosibirsk State University , Novosibirsk 630090, Russia.
authors.forename: Alexey A
authors.initials: AA
authors.lastname: Yusuf
authors.affiliation: School of Materials Sciences and Engineering, University of Science and Technology Beijing , Beijing 100083, China.
authors.forename: Zhiguo
authors.initials: Z
authors.lastname: Xia
keywords: garnet; luminescence; phosphor; pressure; structure; synthesis