Relationship Between Li/Ce Concentration and the Luminescence Properties of Codoped Gd3(Ga, Al)5O12:Ce
Relationship Between Li/Ce Concentration and the Luminescence Properties of Codoped Gd3(Ga, Al)5O12:Ce
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DOI：
10.1002/pssb.201900504
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发表时间：
2019-12
期刊：
影响因子：
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通讯作者：
M. Yoshino;K. Bartosiewicz;Takahiko Horiai;K. Kamada;A. Yamaji;Y. Shoji;Y. Yokota;S. Kurosawa;Y. Ohashi;Hiroki Sato;S. Toyoda;R. Kučerková;V. Jarý;M. Nikl;A. Yoshikawa
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文献类型：
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作者：
M. Yoshino;K. Bartosiewicz;Takahiko Horiai;K. Kamada;A. Yamaji;Y. Shoji;Y. Yokota;S. Kurosawa;Y. Ohashi;Hiroki Sato;S. Toyoda;R. Kučerková;V. Jarý;M. Nikl;A. Yoshikawa
Li+共掺杂Gd_3（Ga，Al）_5 O_（12）：Ce（GGAG：Ce）单晶，使闪烁衰减时间加快。然而，其对GGAG：Ce的闪烁特性的影响仍然知之甚少。在此，Ce/Li浓度和闪烁性能之间的关系进行了研究。采用提拉法生长了不同Ce和Li浓度的GGAG晶体，测量了GGAG：Ce，Li的闪烁衰减和光输出。结果表明，与传统的蒸发器相比，性能相当或有所改善。在光吸收和光致发光（PL）测量中，在具有可变Li浓度的GGAG：Ce样品中没有以清楚的方式观察到稳定的Ce 3+到Ce 4+的转换。相反，似乎出现了一些与缺陷相关的吸收。还评估了具有可变Ce浓度的样品的PL衰减的温度依赖性。当Ce含量大于0.2%时，GGAG样品的发光猝灭温度发生了变化。
Li+ codoping of Gd3(Ga, Al)5O12:Ce (GGAG:Ce) single crystals induces the acceleration of scintillation decay time. However, its effect on the scintillation properties of GGAG:Ce remains poorly understood. Herein, the relationship between Ce/Li concentration and scintillation properties is investigated. GGAG crystals with a range of Ce and Li concentrations are grown by the Czochralski method and the scintillation decay and light output of GGAG:Ce, Li are measured. The results show comparable or improved performance compared with conventional scintillators. In optical absorption and photoluminescence (PL) measurements, the conversion of the stable Ce3+ to Ce4+ is not observed in a clear manner in GGAG:Ce samples with variable Li concentration. Instead, some defect‐related absorption seems to appear. Temperature dependence of PL decay for samples with variable Ce concentration is also evaluated. A shift of the luminescence quenching temperature is observed for GGAG samples with >0.2% Ce.