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Relationship Between Li/Ce Concentration and the Luminescence Properties of Codoped Gd 3 (Ga, Al) 5 O 12 :Ce
Author(s) -
Yoshino Masao,
Bartosiewicz Karol,
Horiai Takahiko,
Kamada Kei,
Yamaji Akihiro,
Shoji Yasuhiro,
Yokota Yuui,
Kurosawa Shunsuke,
Ohashi Yuji,
Sato Hiroki,
Toyoda Satoshi,
Kucerkova Romana,
Jary Vitezslav,
Nikl Martin,
Yoshikawa Akira
Publication year - 2020
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201900504
Subject(s) - scintillation , luminescence , photoluminescence , scintillator , materials science , absorption (acoustics) , analytical chemistry (journal) , quenching (fluorescence) , mineralogy , fluorescence , chemistry , optics , optoelectronics , physics , chromatography , detector , composite material
Li + codoping of Gd 3 (Ga, Al) 5 O 12 :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 Ce 3+ to Ce 4+ 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.