Relationship Between Li/Ce Concentration and the Luminescence Properties of Codoped Gd3(Ga, Al)5O12:Ce

Masao Yoshino, Karol Bartosiewicz, Takahiko Horiai, Kei Kamada, Akihiro Yamaji, Yasuhiro Shoji, Yuui Yokota, Shunsuke Kurosawa, Yuji Ohashi, Hiroki Sato, Satoshi Toyoda, Romana Kucerkova, Vitezslav Jary, Martin Nikl, Akira Yoshikawa

研究成果: Article査読

1 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号1900504
ジャーナルPhysica Status Solidi (B) Basic Research
257
8
DOI
出版ステータスPublished - 2020 8 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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