Citation: GONG Shi-Xing, TIAN Yi-Guang, ZHANG Qiao, CHEN Li-Wei, MAO Pei. Structure and Luminescence Properties of Phosphors (Ca, Me)La₄Si₃O₁₃:Eu³⁺ (Me=Sr, Ba)[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(6): 1192-1198. doi: 10.3969/j.issn.1001-4861.2013.00.153 shu

Structure and Luminescence Properties of Phosphors (Ca, Me)La₄Si₃O₁₃:Eu³⁺ (Me=Sr, Ba)

1.
College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China

Received Date: 26 October 2012
Available Online: 20 January 2013
Fund Project: 国家自然科学基金(No.20771086)资助项目。 (No.20771086)

A series of phosphors (Ca, Me)La₄Si₃O₁₃:Eu³⁺ (Me=Sr, Ba) were prepared via solid-state reactions. The variations of lattice parameters and the luminescence properties were investigated based on modifying dopant concentration of Eu³⁺ and substitution amount of Ca²⁺ by Sr²⁺ or Ba²⁺ in the host. The optimal mole ratio n_Eu³⁺ to n_La³⁺ in the phosphor is 1:7 and the intensity ratio of emission transition ⁵D₀-⁷F₂ to ⁵D₀-⁷F₁ is 2.55 in the studied range. The lattice parameters a and c reduce linearly with concentrations of dopant Eu³⁺ and c is more noticeable so that a/c value increases. There are linear relationships between lattice parameters and substitution amounts of Sr²⁺ or Ba²⁺ to Ca²⁺ in host, but values of a and c increase and that of a/c decreases due to continuous solid solutions formed. The maximum of the luminescent intensities of Eu³⁺ emission appears in the sample in which the substitution amount of Sr²⁺ to Ca²⁺ is 0.4 mole per mole host, however, the intensities increase with the substitution concentrations of Ba²⁺ ions all the while,as well as a change in rate of grade at content 0.4 of Ba²⁺ ion,and the most intensity reaches till whole substitution. The CIE of the sample is (0.638 5, 0.353 0).
- LED;phosphor;apatite;silicate;Eu³⁺
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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Structure and Luminescence Properties of Phosphors (Ca, Me)La₄Si₃O₁₃:Eu³⁺ (Me=Sr, Ba)