Luminescent properties of europium-activated yttrium gadolinium phosphates

Autor:	N. V. Babayevskaya, S. S. Oleinik, Yu. N. Savvin, O. N. Bezkrovnaya, A. V. Tolmachev
Rok vydání:	2009
Předmět:	Aqueous solution Chemistry General Chemical Engineering Gadolinium Metals and Alloys Analytical chemistry chemistry.chemical_element Phosphor Yttrium Inorganic Chemistry Dipole Materials Chemistry Luminescence Europium Excitation
Zdroj:	Inorganic Materials. 45:423-427
ISSN:	1608-3172 0020-1685
Popis:	Nanocrystalline Y1 − x − y Gd x Eu y PO4 phosphors have been prepared via precipitation from aqueous solutions. From their luminescence and excitation spectra, the intensity ratio I 615/I 594 of the Eu3+ luminescence bands corresponding to electric dipole and magnetic dipole transitions has been determined as a function of Gd3+ content. The critical concentration and effective energy transfer radius in Y1 − x − y Gd x Eu y PO4 have been evaluated. Excitation of Gd3+8 S J −6 D J and 8 S J −6 J J transitions to Eu3+ luminescence excitation levels in Y0.99 − x Gd x Eu0.01PO4 involves efficient energy transfer. Under 250-nm excitation, the Eu3+ luminescence yield in Y0.99 − x Gd x Eu0.01PO4 is a factor of 2.5–3 higher than that in Y0.99Eu0.01PO4.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2aedfaae19adf198d7d8dab0b6c9cf81 https://doi.org/10.1134/s0020168509040177 Zobrazit plný text záznamu Plný text ve formátu PDF