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Effect of oxidation annealing on optical properties of YAG:Ce single crystals
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SYSNO ASEP 0445409 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of oxidation annealing on optical properties of YAG:Ce single crystals Author(s) Bok, Jan (UPT-D) RID
Horodyský, P. (CZ)
Krzyžánek, Vladislav (UPT-D) RID, ORCID, SAINumber of authors 3 Source Title Optical Materials. - : Elsevier - ISSN 0925-3467
Roč. 46, AUG 2015 (2015), s. 591-595Number of pages 5 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords scintillator ; YAG:Ce ; oxidation annealing ; charge transfer ; cathodoluminiscence Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering R&D Projects TE01020118 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) GA14-20012S GA ČR - Czech Science Foundation (CSF) LO1212 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) ED0017/01/01 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UPT-D - RVO:68081731 UT WOS 000357350700095 EID SCOPUS 84930824636 DOI https://doi.org/10.1016/j.optmat.2015.05.035 Annotation YAG:Ce single crystals were annealed in air atmosphere at different temperatures. Their optical properties, such as optical absorption, cathodoluminescence spectra, cathodoluminescence decay and thermoluminescence were studied. Growth of UV absorption with increasing annealing temperature is explained by ionization of Ce3+ ions during the oxidation annealing and consequent ligand-to-metal charge transfer to the Ce4+ ions. Near-UV luminescence emission caused by presence of the antisite defects is undesirable for fast scintillation applications. After oxidation annealing, the emission related to the antisite defects is partially quenched due to the spectral overlap of the charge transfer absorption and the antisite defects emission. Together with suppression of electron traps due to the oxidation annealing, the described mechanism effectively decreases luminescence afterglow and improves YAG:Ce scintillation characteristics. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2016
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