Photoluminescence properties of a Ce(3+) doped Sr(3)MgSi(2)O(8) phosphor with good thermal stability.
Photoluminescence properties of a Ce(3+) doped Sr(3)MgSi(2)O(8) phosphor with good thermal stability.
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具有良好热稳定性的 Ce3 掺杂 Sr3MgSi2O8 荧光粉的光致发光性能
DOI：
10.1039/c8ra00526e
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发表时间：
2018-04-23
期刊：
影响因子：
3.9
通讯作者：
Fang M
中科院分区：
文献类型：
--
作者：
Wang B;Liu Y;Huang Z;Fang M
本文主要研究了Ce3+掺杂碱土金属硅酸盐Sr3MgSi2O8的晶体结构和光致发光性能。采用X射线粉末衍射（XRD）和结构细化等方法对材料的相组成和晶体结构进行了表征。测量了该荧光粉的激发光谱、发射光谱和漫反射光谱，讨论了浓度猝灭和热猝灭的机理。结果表明，Sr3MgSi2O8中Ce3+的浓度猝灭是由于Ce3+离子间的偶极-偶极相互作用能量转移所致。该荧光粉具有良好的热稳定性，当温度升至150 ° C时，其发射强度保留达90%。相关的机制被认为是热电离效应，并提出了一个能级图来显示热电离过程。
This study mainly reports an investigation about the crystal structure and photoluminescence properties of a Ce3+ doped alkaline earth metal silicate Sr3MgSi2O8. X-ray powder diffraction (XRD) and structure refinement methods are adopted to characterize the phase composition and crystal structure. The excitation/emission spectra and diffuse reflection spectra (DRS) of the title phosphor are measured and the mechanism of concentration quenching as well as thermal quenching are discussed in detail. Results show that the concentration quenching in Sr3MgSi2O8 is due to dipole–dipole interaction energy transfer between Ce3+ ions. The title phosphor has an excellent thermal stability with 90% emission intensity reserve when the temperature rises to 150 °C. The related mechanism is considered to be the thermal ionization effect and an energy level diagram was proposed to show the thermal ionization process.
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