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首页> 外文期刊>Physica, B. Condensed Matter >Structural, luminescent and thermal properties of blue SrAl2O4:Eu2+, Dy3+ phosphor filled low-density polyethylene composites
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Structural, luminescent and thermal properties of blue SrAl2O4:Eu2+, Dy3+ phosphor filled low-density polyethylene composites

机译：蓝色SrAl2O4：Eu2 +，Dy3 +荧光粉填充的低密度聚乙烯复合材料的结构，发光和热性能

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摘要

The performance of nanophase luminophors is usually compromised by environmentally induced degradation. In this study, composites of low density polyethylene (LDPE) with various concentrations of the blue-emitting europium and dysprosium co-doped strontium aluminate (SrAl2O4:Eu2+,Dy3+) phosphor were investigated. The blue long-lasting phosphorescence of the composites was observed in the dark after removal of the excitation light. X-ray diffraction analysis revealed the presence of the SrAl2O4 phase in the composites. PL spectra of the composites have two sets of peaks, major broad bands peaking at about 4855 angstrom and minor ones at wavelengths between 4115 and 4175 angstrom, attributed to the 4f-5d transition of Eu2+. DSC and TGA results show that the introduction of the phosphor in LDPE matrix caused a slight reduction in the crystallinity of LDPE but a significant increase in the stability of the composites.
机译：纳米相发光体的性能通常受到环境诱导的降解的影响。在这项研究中，研究了低密度聚乙烯（LDPE）与各种浓度的发射蓝光的and和co共掺杂的铝酸锶（SrAl2O4：Eu2 +，Dy3 +）荧光粉的复合材料。去除激发光后，在黑暗中观察到复合材料的蓝色持久磷光。 X射线衍射分析表明复合材料中存在SrAl2O4相。复合材料的PL光谱具有两组峰，主要的宽带峰在4855埃左右，而次要的宽带在4115到4175埃之间，这归因于Eu2 +的4f-5d跃迁。 DSC和TGA结果表明，在LDPE基质中引入磷光体导致LDPE的结晶度略有降低，但是复合物的稳定性显着提高。

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