Highly enhanced luminescence of SrB<sub>4</sub>O<sub>7</sub>:Eu phosphor prepared by the combustion method using glycine as fuel期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Highly enhanced luminescence of SrB₄O₇:Eu phosphor prepared by the combustion method using glycine as fuel

Authors:	Roberval Stefani, Alessandra de S. Maia, Cl udia A. Kodaira, Ercules E.S. Teotonio, Maria C.F.C. Felinto,Hermi F. Brito

Affiliation:	^aInstituto de Química, Universidade de São Paulo, C.P. 26077, CEP 05513-970, São Paulo – SP, Brazil ^bInstituto de Pesquisas Energéticas e Nucleares, Av. Prof. Lineu Prestes 2242, CEP 05508-900, São Paulo – SP, Brazil

Abstract:	Eu²⁺ ion doped into SrB₄O₇ matrix was prepared by combustion method heated at 900 °C in air, using urea (U) or glycine (G) as fuels in different ratios (U100, A10, A25, G10, G25, G75, and G100). In some compositions, ammonium acetate (AA) was used to reduce the exothermicity of combustion reaction. X-ray diffraction and luminescence spectroscopy were used to characterize the material. The high intense emission band at 367 nm is assigned to 4f⁶5d → 4f⁷(⁸S_7/2) transition arisen from divalent europium ion. It is observed that the interconfigurational transition is dependent on the molar ratio of glycine:urea fuels. Glycine fuel favors Eu²⁺ formation in SrB₄O₇ host lattice prepared by combustion method.

Keywords:	Luminescence Divalent europium Strontium tetraborate Glycine Combustion method
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