Tuning the Red-to-Green-Upconversion Luminescence Intensity Ratio of Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> Particles by Changes in Size
Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> samples were synthesized with different reaction times and reaction temperatures using the solvothermal method. We carried out a series of tests on Na3ScF6 crystals. The XRD pattern...
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| Online Access: | https://www.mdpi.com/1996-1944/16/6/2247 |
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| author | Yongling Zhang Xiang Liu Mingxing Song Zhengkun Qin |
| author_facet | Yongling Zhang Xiang Liu Mingxing Song Zhengkun Qin |
| author_sort | Yongling Zhang |
| collection | DOAJ |
| description | Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> samples were synthesized with different reaction times and reaction temperatures using the solvothermal method. We carried out a series of tests on Na3ScF6 crystals. The XRD patterns showed that the monoclinic phases of the Na<sub>3</sub>ScF<sub>6</sub> samples could be synthesized under different reaction conditions, and doping with Yb<sup>3+</sup> ions and Er<sup>3+</sup> ions did not change the crystal structures. The SEM images showed that the sizes of the samples gradually increased with reaction time and reaction temperature. The fluorescence spectra showed that the emission peaks of the prepared samples under 980 nm near-infrared (NIR) excitation were centered at 520 nm/543 nm and 654 nm, corresponding to the <sup>2</sup>H<sub>11/2</sub>/<sup>4</sup>S<sub>3/2</sub>→<sup>4</sup>I<sub>15/2</sub> and <sup>4</sup>F<sub>9/2</sub>→<sup>4</sup>I<sub>15/2</sub> transitions, respectively. With the increasing size of the samples, the emission intensities at 654 nm increased and the luminescence colors changed from green to red; at the same time, the red-to-green luminescence intensity ratios (IR/IG ratios) increased from 0.435 to 15.106—by as much as ~34.7 times. Therefore, this paper provides a scheme for tuning the IR/IG ratios of Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> samples by changing their sizes, making it possible to enhance the intensity of red upconversion, which has great potential for the study of color displays and lighting. |
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| language | English |
| last_indexed | 2024-03-11T06:15:08Z |
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| spelling | doaj.art-361be2d032074e71995c2982554442722023-11-17T12:19:32ZengMDPI AGMaterials1996-19442023-03-01166224710.3390/ma16062247Tuning the Red-to-Green-Upconversion Luminescence Intensity Ratio of Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> Particles by Changes in SizeYongling Zhang0Xiang Liu1Mingxing Song2Zhengkun Qin3School of Chemistry and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, ChinaCollege of Information & Technology, Jilin Normal University, Siping 136000, ChinaCollege of Information & Technology, Jilin Normal University, Siping 136000, ChinaCollege of Information & Technology, Jilin Normal University, Siping 136000, ChinaNa<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> samples were synthesized with different reaction times and reaction temperatures using the solvothermal method. We carried out a series of tests on Na3ScF6 crystals. The XRD patterns showed that the monoclinic phases of the Na<sub>3</sub>ScF<sub>6</sub> samples could be synthesized under different reaction conditions, and doping with Yb<sup>3+</sup> ions and Er<sup>3+</sup> ions did not change the crystal structures. The SEM images showed that the sizes of the samples gradually increased with reaction time and reaction temperature. The fluorescence spectra showed that the emission peaks of the prepared samples under 980 nm near-infrared (NIR) excitation were centered at 520 nm/543 nm and 654 nm, corresponding to the <sup>2</sup>H<sub>11/2</sub>/<sup>4</sup>S<sub>3/2</sub>→<sup>4</sup>I<sub>15/2</sub> and <sup>4</sup>F<sub>9/2</sub>→<sup>4</sup>I<sub>15/2</sub> transitions, respectively. With the increasing size of the samples, the emission intensities at 654 nm increased and the luminescence colors changed from green to red; at the same time, the red-to-green luminescence intensity ratios (IR/IG ratios) increased from 0.435 to 15.106—by as much as ~34.7 times. Therefore, this paper provides a scheme for tuning the IR/IG ratios of Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> samples by changing their sizes, making it possible to enhance the intensity of red upconversion, which has great potential for the study of color displays and lighting.https://www.mdpi.com/1996-1944/16/6/2247Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup>upconversionsizeR/G ratio |
| spellingShingle | Yongling Zhang Xiang Liu Mingxing Song Zhengkun Qin Tuning the Red-to-Green-Upconversion Luminescence Intensity Ratio of Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> Particles by Changes in Size Materials Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> upconversion size R/G ratio |
| title | Tuning the Red-to-Green-Upconversion Luminescence Intensity Ratio of Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> Particles by Changes in Size |
| title_full | Tuning the Red-to-Green-Upconversion Luminescence Intensity Ratio of Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> Particles by Changes in Size |
| title_fullStr | Tuning the Red-to-Green-Upconversion Luminescence Intensity Ratio of Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> Particles by Changes in Size |
| title_full_unstemmed | Tuning the Red-to-Green-Upconversion Luminescence Intensity Ratio of Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> Particles by Changes in Size |
| title_short | Tuning the Red-to-Green-Upconversion Luminescence Intensity Ratio of Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> Particles by Changes in Size |
| title_sort | tuning the red to green upconversion luminescence intensity ratio of na sub 3 sub scf sub 6 sub 20 yb sup 3 sup 2 er sup 3 sup particles by changes in size |
| topic | Na<sub>3</sub>ScF<sub>6</sub>: 20% Yb<sup>3+</sup>, 2% Er<sup>3+</sup> upconversion size R/G ratio |
| url | https://www.mdpi.com/1996-1944/16/6/2247 |
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