Bandgap engineering—Influence of the evolution of (Zn/Mg)Al 2 O 4 :Cr 3+ spinel phosphors on the photoluminescence properties
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Wiley
2024
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| author | Ming Qiang Xiaomeng Yin Yang Tang Xueke Xu Hui Lin Dawei Zhang |
| author_facet | Ming Qiang Xiaomeng Yin Yang Tang Xueke Xu Hui Lin Dawei Zhang Ming Qiang Xiaomeng Yin Yang Tang Xueke Xu Hui Lin Dawei Zhang |
| collection | Wiley Open Access |
| contents | Bandgap engineering—Influence of the evolution of (Zn/Mg)Al 2 O 4 :Cr 3+ spinel phosphors on the photoluminescence properties Ming Qiang Xiaomeng Yin Yang Tang Xueke Xu Hui Lin Dawei Zhang Journal of the American Ceramic Society Abstract As a luminescent center ion in materials for deep red and near‐infrared light, Cr 3+ has been extensively studied in octahedral host materials. In this study, using zinc aluminate (ZnAl 2 O 4 ) and magnesium aluminate (MgAl 2 O 4 ) spinels with abundant octahedra as substrates, a series of Zn 1− x Mg x Al 2 O 4 :0.5%Cr 3+ ( x = 0, 0.2, 0.4, 0.6, 0.8, and 1) fluorescent powders were first prepared via a high‐temperature solid‐state method. The influence of different Mg/Zn ratios on (Zn/Mg)Al 2 O 4 :0.5%Cr 3+ optical properties was thoroughly explored. Experimental results show that an increase in the Mg/Zn ratio reduces the crystal field strength ( D q ) and leads to distortion of the [AlO 6 ] octahedra, resulting in broadening of the photoluminescence emission spectrum. Furthermore, the addition of Mg gradually reduces the formation of inverse spinel. An appropriate Mg/Zn ratio can improve luminescent intensity and quantum efficiency. In summary, this paper, through bandgap engineering by adjusting the Mg/Zn ratio, provides a detailed account of the changes in optical properties and the underlying mechanisms during the transition from ZnAl 2 O 4 :0.5%Cr 3+ to MgAl 2 O 4 :0.5%Cr 3+ spinels. It offers valuable insights for further research on the practical applications of Cr 3+ in areas such as lighting displays and bioimaging. 10.1111/jace.19728 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| doi_str_mv | 10.1111/jace.19728 |
| format | Artículo Open Access |
| id | wiley_oa_10_1111_jace_19728 |
| institution | Wiley Open Access |
| license_str_mv | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| publishDate | 2024 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Bandgap engineering—Influence of the evolution of (Zn/Mg)Al 2 O 4 :Cr 3+ spinel phosphors on the photoluminescence properties Ming Qiang Xiaomeng Yin Yang Tang Xueke Xu Hui Lin Dawei Zhang Journal of the American Ceramic Society Bandgap engineering—Influence of the evolution of (Zn/Mg)Al 2 O 4 :Cr 3+ spinel phosphors on the photoluminescence properties Ming Qiang Xiaomeng Yin Yang Tang Xueke Xu Hui Lin Dawei Zhang Journal of the American Ceramic Society Abstract As a luminescent center ion in materials for deep red and near‐infrared light, Cr 3+ has been extensively studied in octahedral host materials. In this study, using zinc aluminate (ZnAl 2 O 4 ) and magnesium aluminate (MgAl 2 O 4 ) spinels with abundant octahedra as substrates, a series of Zn 1− x Mg x Al 2 O 4 :0.5%Cr 3+ ( x = 0, 0.2, 0.4, 0.6, 0.8, and 1) fluorescent powders were first prepared via a high‐temperature solid‐state method. The influence of different Mg/Zn ratios on (Zn/Mg)Al 2 O 4 :0.5%Cr 3+ optical properties was thoroughly explored. Experimental results show that an increase in the Mg/Zn ratio reduces the crystal field strength ( D q ) and leads to distortion of the [AlO 6 ] octahedra, resulting in broadening of the photoluminescence emission spectrum. Furthermore, the addition of Mg gradually reduces the formation of inverse spinel. An appropriate Mg/Zn ratio can improve luminescent intensity and quantum efficiency. In summary, this paper, through bandgap engineering by adjusting the Mg/Zn ratio, provides a detailed account of the changes in optical properties and the underlying mechanisms during the transition from ZnAl 2 O 4 :0.5%Cr 3+ to MgAl 2 O 4 :0.5%Cr 3+ spinels. It offers valuable insights for further research on the practical applications of Cr 3+ in areas such as lighting displays and bioimaging. 10.1111/jace.19728 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| title | Bandgap engineering—Influence of the evolution of (Zn/Mg)Al 2 O 4 :Cr 3+ spinel phosphors on the photoluminescence properties |
| topic | Journal of the American Ceramic Society |
| url | https://ceramics.onlinelibrary.wiley.com/doi/10.1111/jace.19728 |