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LaYO_{3}:Sm^{3+} Nanocrystalline Phosphor: Preparation and Emission Properties

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Đorđević V., Nikolić M., Antić Ž., Mitrić M., Dramićanin M.

Acta Physica Polonica A

2011

vol. 120

issue 2

303-305

Samarium doped LaYO_{3} nanocrystalline phosphor powders are obtained by polymer complex solution method. Stoichiometric quantities of La_{2}O_{3}, Y_{2}O_{3} and for dopant ions Sm_{2}O_{3} were dissolved in hot nitric acid. Polyethylene glycol was added in solutions in 1:1 mass ratio to corresponding metal nitrates to form gel. The gel is combusted and annealed at 800°C for two hours to form nanopowder samples. Crystalline structure and phase purity is checked by X-ray diffraction and show that this material is synthesized in cubic bixbyite type structure for the first time. Luminescence properties of Sm^{3+} doped LaYO_{3} exhibited characteristic orange-red emission coming from the intra-4f-shell ^{4}G_{5/2}→^{6}H_{J} electron transitions with emission decay of 1.5 ms. Energy level positions are derived from emission and excitation spectra.

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1 Acta Physica Polonica A

1 2011

1 Antić Ž.

1 Dramićanin M.

1 Mitrić M.

1 Nikolić M.

1 Đorđević V.

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LaYO_{3}:Sm^{3+} Nanocrystalline Phosphor: Preparation and Emission Properties