Influence of processing conditions on synthesis and photoluminescence of Eu3+-activated strontium stannate phosphors

Autor:	Yen-Hwei Chang, Yu-Chung Chen, Bin-Siang Tsai
Rok vydání:	2005
Předmět:	Strontium Materials science Photoluminescence Stannate Mechanical Engineering Metals and Alloys Analytical chemistry chemistry.chemical_element Mineralogy Phosphor law.invention chemistry Mechanics of Materials law Materials Chemistry Calcination Electric dipole transition Luminescence Europium
Zdroj:	Journal of Alloys and Compounds. 398:256-260
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2005.02.019
Popis:	The synthesis and photoluminescence (PL) properties of strontium stannate crystals doped with europium grown by mechanical activation in a high-energy vibro-mill have been investigated. The characteristics of Sr 2 SnO 4 :Eu 3+ powders were found to depend on the heating conditions and the amounts of europium ions. The XRD profiles revealed that the system, (Sr 1− x Eu x ) 2 SnO 4 , could form stable solid solutions in the composition range x = 0–0.1. In the scanning electron microscopy (SEM) morphology observations, the shape of the grains was changed gradually from granular to globular as the calcination temperature increased from 1000 to 1300 °C. The calcined powders emit bright red luminescence centered at 619 nm due to the electric dipole transition 5 D 0 → 7 F 2 , and the powders fired at 1200 °C were found to have the maximum PL intensity. The maximum PL intensity has been obtained for 5 mol% concentration of Eu 3+ in Sr 2 SnO 4 .
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5a4fc3ee0587092539a9022908fa51bf https://doi.org/10.1016/j.jallcom.2005.02.019 Zobrazit plný text záznamu Full Text from ScienceDirect