Effect of nominal substitution of Dy3+ for host cations in SrAl2O4: Eu2+ phosphor on phase evolution and long afterglow luminescence

Autor:	Kwanghyun Chung, Shafqat Ullah, Hyunho Shin
Rok vydání:	2012
Předmět:	Chemistry Mechanical Engineering Metals and Alloys Mineralogy chemistry.chemical_element Phosphor Phase evolution Afterglow Crystallography Mechanics of Materials Lattice (order) Materials Chemistry Luminescence Boron Structural unit Stoichiometry
Zdroj:	Journal of Alloys and Compounds. 544:181-187
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2012.07.087
Popis:	SrAl 2 O 4 : Eu 2+ , Dy 3+ long-afterglow (LAG) phosphors with nominal substitution of Dy for Al site demonstrated superior performance as compared to the cases of nominal substitution for the Sr site or excess addition, despite the fact that a reduced quantity of the SrAl 2 O 4 main host phase existed when Dy 3+ was nominally substituted for Al. It was deduced that if the number of Al available for the formation of the main host was less than the stoichiometric value of 2 with reference to the number of Sr lattice site in the main host, boron would suitably join the [Al,B]O 4 structural unit, yielding an improved incorporation of Dy 3+ to the SrAl 2 O 4 main host which, in turn, improves the LAG luminescence.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8eb3383952ad9af5e8677cfa4e0a1cf6 https://doi.org/10.1016/j.jallcom.2012.07.087 Zobrazit plný text záznamu Full Text from ScienceDirect