<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Undoped and rare-earth-ion-doped Y3Al5O12 (YAG) nanopowders are prepared by the sol-gel low-temperature combustion method. The luminescence characteristics of the YAG, YAG: Ce, YAG:Pr, and YAG: Ce/Pr nanopowders are compared with those of the single crystals. The luminescence band peaking around 3.1 eV is complex and excited at about 3.6 eV, 3.9 eV and 4.3 eV. The 3.1 eV emission was peculiar to all the samples studied. The Stokes shift of this band is ~0.5 eV. The decay time of the ~3.1 eV emission at 80 K is ~14 ns and the slower decay (afterglow) components are practically absent. The 3.1 eV luminescence was suggested to arise from different intrinsic lattice defects.</abstract>

Undoped and rare-earth-ion-doped Y3Al5O12 (YAG) nanopowders are prepared by the sol-gel low-temperature combustion method. The luminescence characteristics of the YAG, YAG: Ce, YAG:Pr, and YAG: Ce/Pr nanopowders are compared with those of the single crystals. The luminescence band peaking around 3.1 eV is complex and excited at about 3.6 eV, 3.9 eV and 4.3 eV. The 3.1 eV emission was peculiar to all the samples studied. The Stokes shift of this band is ~0.5 eV. The decay time of the ~3.1 eV emission at 80 K is ~14 ns and the slower decay (afterglow) components are practically absent. The 3.1 eV luminescence was suggested to arise from different intrinsic lattice defects.

Defect Luminescence of Yag Nanopowders and Crystals

Institute of Solid State Physics (LU), 8 Kengaraga Str., Riga, LV-1063, LATVIA

Institute of Inorganic Chemistry (RTU), 34 Miera Str., Salaspils, LV-2169, LATVIA

Institute of Physics, University of Tartu, 142 Riia Str., Tartu, 51014, ESTONIA

Latvian Journal of Physics and Technical Sciences

{"article-title":"Defect Luminescence of Yag Nanopowders and Crystals"}

Undoped and rare-earth-ion-doped Y3Al5O12 (YAG) nanopowders are prepared by the sol-gel low-temperature combustion method. The luminescence characteristics of...

Defect Luminescence of Yag Nanopowders and Crystals

Pubblicato online: 17 set 2012

Pagine: 54 - 60

DOI: https://doi.org/10.2478/v10047-012-0022-4

Parole chiave
defects, single crystals, nanopowders, luminescence

This content is open access.

Defect Luminescence of Yag Nanopowders and Crystals

Pubblicato online: 17 set 2012

Pagine: 54 - 60

DOI: https://doi.org/10.2478/v10047-012-0022-4

Parole chiavedefects, single crystals, nanopowders, luminescence

This content is open access.

Parole chiave
defects, single crystals, nanopowders, luminescence