Bi<sup>3+</sup> and Eu<sup>3+</sup> Activated Luminescent Behaviors in Non-Stoichiometric LaO<sub>0.65</sub>F<sub>1.7</sub> Structure
Optical materials composed of La<sub>1-</sub><i><sub>p</sub></i><sub>-</sub><i><sub>q</sub></i>Bi<i><sub>p</sub></i>Eu<i><sub>q</sub></i>O<sub>0.65</sub>F<sub>1.7...
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MDPI AG
2020-05-01
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| Online Access: | https://www.mdpi.com/1996-1944/13/10/2326 |
| _version_ | 1797567558845464576 |
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| author | Sungjun Yang Sangmoon Park |
| author_facet | Sungjun Yang Sangmoon Park |
| author_sort | Sungjun Yang |
| collection | DOAJ |
| description | Optical materials composed of La<sub>1-</sub><i><sub>p</sub></i><sub>-</sub><i><sub>q</sub></i>Bi<i><sub>p</sub></i>Eu<i><sub>q</sub></i>O<sub>0.65</sub>F<sub>1.7</sub> (<i>p</i> = 0.001–0.05, <i>q</i> = 0–0.1) were prepared via a solid-state reaction using La(Bi,Eu)<sub>2</sub>O<sub>3</sub> and NH<sub>4</sub>F precursors at 1050 °C for two hours. X-ray diffraction patterns of the phosphors were obtained permitting the calculation of unit-cell parameters. The two La<sup>3+</sup> cation sites were clearly distinguished by exploiting the photoluminescence excitation and emission spectra through Bi<sup>3+</sup> and Eu<sup>3+</sup> transitions in the non-stoichiometric host lattice. Energy transfer from Bi<sup>3+</sup> to Eu<sup>3</sup><sup>+</sup> upon excitation with 286 nm radiation and its mechanism in the Bi<sup>3+</sup>- and Eu<sup>3+</sup>-doped host structures is discussed. The desired Commission Internationale de l’Eclairage values, including emissions in blue-green, white, and red wavelength regions, were obtained from the Bi<sup>3+</sup>- and Eu<sup>3+</sup>-doped LaO<sub>0.65</sub>F<sub>1.7</sub> phosphors. |
| first_indexed | 2024-03-10T19:44:39Z |
| format | Article |
| id | doaj.art-4ff4358dd36645198904bec0972e632f |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T19:44:39Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-4ff4358dd36645198904bec0972e632f2023-11-20T00:55:17ZengMDPI AGMaterials1996-19442020-05-011310232610.3390/ma13102326Bi<sup>3+</sup> and Eu<sup>3+</sup> Activated Luminescent Behaviors in Non-Stoichiometric LaO<sub>0.65</sub>F<sub>1.7</sub> StructureSungjun Yang0Sangmoon Park1Division of Energy Convergence Engineering, Major in Energy & Applied Chemistry, Silla University, Busan 46958, KoreaDivision of Energy Convergence Engineering, Major in Energy & Applied Chemistry, Silla University, Busan 46958, KoreaOptical materials composed of La<sub>1-</sub><i><sub>p</sub></i><sub>-</sub><i><sub>q</sub></i>Bi<i><sub>p</sub></i>Eu<i><sub>q</sub></i>O<sub>0.65</sub>F<sub>1.7</sub> (<i>p</i> = 0.001–0.05, <i>q</i> = 0–0.1) were prepared via a solid-state reaction using La(Bi,Eu)<sub>2</sub>O<sub>3</sub> and NH<sub>4</sub>F precursors at 1050 °C for two hours. X-ray diffraction patterns of the phosphors were obtained permitting the calculation of unit-cell parameters. The two La<sup>3+</sup> cation sites were clearly distinguished by exploiting the photoluminescence excitation and emission spectra through Bi<sup>3+</sup> and Eu<sup>3+</sup> transitions in the non-stoichiometric host lattice. Energy transfer from Bi<sup>3+</sup> to Eu<sup>3</sup><sup>+</sup> upon excitation with 286 nm radiation and its mechanism in the Bi<sup>3+</sup>- and Eu<sup>3+</sup>-doped host structures is discussed. The desired Commission Internationale de l’Eclairage values, including emissions in blue-green, white, and red wavelength regions, were obtained from the Bi<sup>3+</sup>- and Eu<sup>3+</sup>-doped LaO<sub>0.65</sub>F<sub>1.7</sub> phosphors.https://www.mdpi.com/1996-1944/13/10/2326X-ray diffractionphosphorsBi<sup>3+</sup>, Eu<sup>3+</sup> transitionsenergy transfer |
| spellingShingle | Sungjun Yang Sangmoon Park Bi<sup>3+</sup> and Eu<sup>3+</sup> Activated Luminescent Behaviors in Non-Stoichiometric LaO<sub>0.65</sub>F<sub>1.7</sub> Structure Materials X-ray diffraction phosphors Bi<sup>3+</sup>, Eu<sup>3+</sup> transitions energy transfer |
| title | Bi<sup>3+</sup> and Eu<sup>3+</sup> Activated Luminescent Behaviors in Non-Stoichiometric LaO<sub>0.65</sub>F<sub>1.7</sub> Structure |
| title_full | Bi<sup>3+</sup> and Eu<sup>3+</sup> Activated Luminescent Behaviors in Non-Stoichiometric LaO<sub>0.65</sub>F<sub>1.7</sub> Structure |
| title_fullStr | Bi<sup>3+</sup> and Eu<sup>3+</sup> Activated Luminescent Behaviors in Non-Stoichiometric LaO<sub>0.65</sub>F<sub>1.7</sub> Structure |
| title_full_unstemmed | Bi<sup>3+</sup> and Eu<sup>3+</sup> Activated Luminescent Behaviors in Non-Stoichiometric LaO<sub>0.65</sub>F<sub>1.7</sub> Structure |
| title_short | Bi<sup>3+</sup> and Eu<sup>3+</sup> Activated Luminescent Behaviors in Non-Stoichiometric LaO<sub>0.65</sub>F<sub>1.7</sub> Structure |
| title_sort | bi sup 3 sup and eu sup 3 sup activated luminescent behaviors in non stoichiometric lao sub 0 65 sub f sub 1 7 sub structure |
| topic | X-ray diffraction phosphors Bi<sup>3+</sup>, Eu<sup>3+</sup> transitions energy transfer |
| url | https://www.mdpi.com/1996-1944/13/10/2326 |
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