Influence of Ga Substitution on the Local Structure and Luminescent Properties of Eu-Doped CaYAlO<sub>4</sub> Phosphors
Understanding the local environment of luminescent centers in phosphors serves as a blueprint for designing the luminescent properties of phosphors. Chemical substitution is a general strategy for engineering the local structure around luminescent center ions. In this study, we systematically invest...
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MDPI AG
2023-08-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/11/8/329 |
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| author | Ju Hyun Oh Hyunwoo Kim Mijeong Kang Seunghun Lee |
| author_facet | Ju Hyun Oh Hyunwoo Kim Mijeong Kang Seunghun Lee |
| author_sort | Ju Hyun Oh |
| collection | DOAJ |
| description | Understanding the local environment of luminescent centers in phosphors serves as a blueprint for designing the luminescent properties of phosphors. Chemical substitution is a general strategy for engineering the local structure around luminescent center ions. In this study, we systematically investigate the luminescent properties of Ga-substituted Eu-doped CaYAlO<sub>4</sub> (CYAGO:Eu) phosphors and the local structure of the Eu ions. The Ga substitution at the Al sites leads to a significant enhancement in the electric dipole transition of Eu<sup>3+</sup> (<sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>2</sub>). The Judd–Ofelt analysis reveals that Eu<sup>3+</sup> ions are substituted for Ca/Y, and the Ga substitution increases the asymmetricity of the local structure around the Eu ions because of the different ionic radii and electronegativities of Al and Ga. In addition, Eu<sup>2+</sup> emission is missing regardless of the Ga substitution and post-hydrogen treatments. The present work provides deeper insight into the role of chemical substitution in oxide phosphors. |
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| issn | 2304-6740 |
| language | English |
| last_indexed | 2024-03-10T23:51:07Z |
| publishDate | 2023-08-01 |
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| series | Inorganics |
| spelling | doaj.art-12eafaa22c6647148bc2f97e53a668a82023-11-19T01:35:40ZengMDPI AGInorganics2304-67402023-08-0111832910.3390/inorganics11080329Influence of Ga Substitution on the Local Structure and Luminescent Properties of Eu-Doped CaYAlO<sub>4</sub> PhosphorsJu Hyun Oh0Hyunwoo Kim1Mijeong Kang2Seunghun Lee3Department of Physics, Pukyong National University, Busan 48513, Republic of KoreaDepartment of Physics, Pukyong National University, Busan 48513, Republic of KoreaDepartment of Optics and Mechatronics Engineering, Pusan National University, Busan 46241, Republic of KoreaDepartment of Physics, Pukyong National University, Busan 48513, Republic of KoreaUnderstanding the local environment of luminescent centers in phosphors serves as a blueprint for designing the luminescent properties of phosphors. Chemical substitution is a general strategy for engineering the local structure around luminescent center ions. In this study, we systematically investigate the luminescent properties of Ga-substituted Eu-doped CaYAlO<sub>4</sub> (CYAGO:Eu) phosphors and the local structure of the Eu ions. The Ga substitution at the Al sites leads to a significant enhancement in the electric dipole transition of Eu<sup>3+</sup> (<sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>2</sub>). The Judd–Ofelt analysis reveals that Eu<sup>3+</sup> ions are substituted for Ca/Y, and the Ga substitution increases the asymmetricity of the local structure around the Eu ions because of the different ionic radii and electronegativities of Al and Ga. In addition, Eu<sup>2+</sup> emission is missing regardless of the Ga substitution and post-hydrogen treatments. The present work provides deeper insight into the role of chemical substitution in oxide phosphors.https://www.mdpi.com/2304-6740/11/8/329CaYAlO<sub>4</sub>phosphorschemical substitutioneuropiumJudd–Ofelt analysislocal structure |
| spellingShingle | Ju Hyun Oh Hyunwoo Kim Mijeong Kang Seunghun Lee Influence of Ga Substitution on the Local Structure and Luminescent Properties of Eu-Doped CaYAlO<sub>4</sub> Phosphors Inorganics CaYAlO<sub>4</sub> phosphors chemical substitution europium Judd–Ofelt analysis local structure |
| title | Influence of Ga Substitution on the Local Structure and Luminescent Properties of Eu-Doped CaYAlO<sub>4</sub> Phosphors |
| title_full | Influence of Ga Substitution on the Local Structure and Luminescent Properties of Eu-Doped CaYAlO<sub>4</sub> Phosphors |
| title_fullStr | Influence of Ga Substitution on the Local Structure and Luminescent Properties of Eu-Doped CaYAlO<sub>4</sub> Phosphors |
| title_full_unstemmed | Influence of Ga Substitution on the Local Structure and Luminescent Properties of Eu-Doped CaYAlO<sub>4</sub> Phosphors |
| title_short | Influence of Ga Substitution on the Local Structure and Luminescent Properties of Eu-Doped CaYAlO<sub>4</sub> Phosphors |
| title_sort | influence of ga substitution on the local structure and luminescent properties of eu doped cayalo sub 4 sub phosphors |
| topic | CaYAlO<sub>4</sub> phosphors chemical substitution europium Judd–Ofelt analysis local structure |
| url | https://www.mdpi.com/2304-6740/11/8/329 |
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