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首页> 外文期刊>Optical Materials >Effects of Gd/Lu ratio on the luminescence properties and garnet phase stability of Ce~(3+) activated Gd_xLu_(3-x)Al_5O_(12) single crystals
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Effects of Gd/Lu ratio on the luminescence properties and garnet phase stability of Ce~(3+) activated Gd_xLu_(3-x)Al_5O_(12) single crystals

机译：Gd / Lu比对Ce〜（3+）活化Gd_xLu_（3-x）Al_5O_（12）单晶的发光性质和石榴石相稳定性的影响

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摘要

The luminescence properties of Ce3+ activated (Gd,Lu)(3)Al5O12 single crystals are investigated as a function of the Gd/Lu ratio with the aim of an improved understanding of the luminescence quenching, energy transfer processes, and garnet phase stability. Upon heavy substitution of Lu with Gd, the target garnet phase becomes thermodynamically unstable and unwanted secondary phase inclusions arise. The secondary phase shows luminescence properties in the UV spectral range. The thermal quenching process of the 5d -> 4f emission of Ce3+ in the garnet phase is determined by the temperature dependence of the photoluminescence decay time and delayed radiative recombination decays. The results show that the onset of the thermal quenching is moved to lower temperatures with increasing the Gd3+ content. The main mechanism responsible for the luminescence quenching is due to the non-radiative relaxation from 5d(1) excited state to 4f ground state of Ce3+. The energy transfer processes between Gd3+ and Ce3+ as well as between secondary and garnet phase are evidenced by the photoluminescence excitation and emission spectra as well as decay kinetic measurements.
机译：研究Ce3 +活化的（Gd，Lu）（3）Al5O12单晶的发光性质与Gd / Lu比的关系，以期更好地理解发光猝灭，能量转移过程和石榴石相稳定性。在Lu被Gd大量取代后，目标石榴石相在热力学上变得不稳定，并且出现了不需要的第二相夹杂物。第二相在紫外光谱范围内显示发光特性。石榴石相中Ce3 +的5d-> 4f发射的热猝灭过程取决于光致发光衰减时间和延迟的辐射复合衰减的温度依赖性。结果表明，随着Gd3 +含量的增加，热淬火的开始移至较低的温度。 Ce3 +从5d（1）激发态到4f基态的非辐射弛豫是造成发光猝灭的主要机理。 Gd3 +和Ce3 +之间以及次级和石榴石相之间的能量转移过程通过光致发光激发和发射光谱以及衰减动力学测量得到证明。

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  • 来源
    《Optical Materials》 |2018年第6期|98-105|共8页
  • 作者

    Bartosiewicz K.; Babin V.; Kamada K.; Yoshikawa A.; Beitlerova A.; Nikl M.;

  • 作者单位

    Acad Sci Czech Republ Inst Phys Na Slovance 1999-2 Prague 18221 8 Czech Republic;

    Tohoku Univ Inst Mat Res Aoba Ku 2-1-1 Katahira Sendai Miyagi 9808577 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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