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9 March 2024 Site-selective spectroscopic study on Eu3+-doped YSiO2N oxynitride phosphor
Yuuki Kitagawa
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Proceedings Volume PC12882, Optical Components and Materials XXI; PC1288206 (2024) https://doi.org/10.1117/12.3010246
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
Highly efficient and narrow-band red phosphors with blue or near-UV excitation are strongly required to improve the color rendering property and luminous efficacy of the existing white LEDs. With this aim in view, the Eu3+-doped YSiO2N oxynitride phosphor was developed, whose charge transfer excitation band was located at the near-UV region (~320–340 nm) due to covalent N 2p orbitals. To investigate the effect of the mixed-anion coordination around Eu3+ ions, the relationship between the luminescence properties and the local environments was investigated with site-selective and time-resolved spectroscopy. The Eu3+ luminescence properties in Y3+ sites that differ in terms of centrosymmetric were characterized, and the results suggest that thermal distortion with a lack of the inversion center induces the electronic dipole transition, resulting in a shorter luminescence lifetime.
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Yuuki Kitagawa "Site-selective spectroscopic study on Eu3+-doped YSiO2N oxynitride phosphor", Proc. SPIE PC12882, Optical Components and Materials XXI, PC1288206 (9 March 2024); https://doi.org/10.1117/12.3010246
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KEYWORDS
Luminescence
Ions
Spectroscopy
Crystals
Near ultraviolet
Luminous efficiency
Magnetism
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