Journal Article

PUBDB-2024-06390

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Comparative VUV Synchrotron Excitation Study of YAG: Eu and YAG: Cr Ceramics

Zhunusbekov, A.Extern* ; Karipbayev, Z. (Corresponding author)Extern* ; Tolegenova, A. ; Kumarbekov, K. K.Extern* ; Nurmoldin, E. E. ; Baizhumanov, M. M. ; Kotlov, A.DESY* ; Popov, A. (Corresponding author)Extern*

2024
MDPI Basel

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Please use a persistent id in citations: doi:10.3390/cryst14100897  doi:10.3204/PUBDB-2024-06390

Abstract: Using synchrotron radiation, a comparative VUV excitation study of YAG ceramics doped with Eu3+ and Cr3+ ions under VUV excitation (10.5–3.7 eV) at 9 K was conducted in this work. Both ceramics exhibit distinct excitation peaks in the VUV region, indicating high-energy transitions related to the internal electronic levels of the dopants and interband transitions within the YAG matrix. For YAG:Eu, the main excitation peaks at 6–7 eV correspond to transitions within the 4f-shell of Eu3+ and Eu3+-O2− charge transfer states, showing weak dependence on the crystal field and high energy conversion efficiency. In contrast, YAG:Cr shows broad excitation bands due to transitions between levels influenced by strong crystal field interactions, resulting in lower luminescence efficiency. The study highlights the importance of crystal structure and dopant interactions in determining the spectral characteristics of YAG-based ceramics, offering potential for their application in advanced optoelectronic devices.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-S (FS-PETRA-S)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20231138 (I-20231138) (I-20231138)
4. FS-Proposal: I-20240324 EC (I-20240324-EC) (I-20240324-EC)

Experiment(s):

1. PETRA Beamline P66 (PETRA III)

Appears in the scientific report 2024

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