Novel Mn<sup>4+</sup>-Activated K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<i><sub>x</sub></i>F<sub>7</sub> (0 ≤ <i>x</i> ≤ 0.15) Solid Solution Red Phosphors with Superior Moisture Resistance and Good Thermal Stability
Nowadays, Mn<sup>4+</sup>-activated fluoride red phosphors with excellent luminescence properties have triggered tremendous attentions for enhancing the performance of white light-emitting diodes (WLEDs). Nonetheless, the poor moisture resistance of these phosphors impedes their commerci...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/11/4566 |
| _version_ | 1797596999704379392 |
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| author | Yuhan Gao Lei Feng Linglin Wang Jun Zheng Feiyao Ren Siyu Liu Zhanglei Ning Ting Zhou Xiaochun Wu Xin Lai Daojiang Gao |
| author_facet | Yuhan Gao Lei Feng Linglin Wang Jun Zheng Feiyao Ren Siyu Liu Zhanglei Ning Ting Zhou Xiaochun Wu Xin Lai Daojiang Gao |
| author_sort | Yuhan Gao |
| collection | DOAJ |
| description | Nowadays, Mn<sup>4+</sup>-activated fluoride red phosphors with excellent luminescence properties have triggered tremendous attentions for enhancing the performance of white light-emitting diodes (WLEDs). Nonetheless, the poor moisture resistance of these phosphors impedes their commercialization. Herein, we proposed the dual strategies of “solid solution design” and “charge compensation” to design K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<sub><i>x</i></sub>F<sub>7</sub> novel fluoride solid solution system, and synthesized the Mn<sup>4+</sup>-activated K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<sub><i>x</i></sub>F<sub>7</sub> (0 ≤ <i>x</i> ≤ 0.15, <i>x</i> represents the mol % of Mo<sup>6+</sup> in the initial solution) red phosphors via co-precipitation method. The doping of Mo<sup>6+</sup> not only significantly improve the moisture resistance of the K<sub>2</sub>NbF<sub>7</sub>: Mn<sup>4+</sup> phosphor without any passivation and surface coating, but also effectively enhance the luminescence properties and thermal stability. In particular, the obtained K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<i><sub>x</sub></i>F<sub>7</sub>: Mn<sup>4+</sup> (<i>x</i> = 0.05) phosphor possesses the quantum yield of 47.22% and retains 69.95% of its initial emission intensity at 353 K. Notably, the normalized intensity of the red emission peak (627 nm) for the K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<sub><i>x</i></sub>F<sub>7</sub>: Mn<sup>4+</sup> (<i>x</i> = 0.05) phosphor is 86.37% of its initial intensity after immersion for 1440 min, prominently higher than that of the K<sub>2</sub>NbF<sub>7</sub>: Mn<sup>4+</sup> phosphor. Moreover, a high-performance WLED with high CRI of 88 and low CCT of 3979 K is fabricated by combining blue chip (InGaN), yellow phosphor (Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>: Ce<sup>3+</sup>) and the K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<sub><i>x</i></sub>F<sub>7</sub>: Mn<sup>4+</sup> (<i>x</i> = 0.05) red phosphor. Our findings convincingly demonstrate that the K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<sub><i>x</i></sub>F<sub>7</sub>: Mn<sup>4+</sup> phosphors have a good practical application in WLEDs. |
| first_indexed | 2024-03-11T03:00:37Z |
| format | Article |
| id | doaj.art-587b3d0793244df8ae6387ac659615b5 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T03:00:37Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-587b3d0793244df8ae6387ac659615b52023-11-18T08:18:21ZengMDPI AGMolecules1420-30492023-06-012811456610.3390/molecules28114566Novel Mn<sup>4+</sup>-Activated K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<i><sub>x</sub></i>F<sub>7</sub> (0 ≤ <i>x</i> ≤ 0.15) Solid Solution Red Phosphors with Superior Moisture Resistance and Good Thermal StabilityYuhan Gao0Lei Feng1Linglin Wang2Jun Zheng3Feiyao Ren4Siyu Liu5Zhanglei Ning6Ting Zhou7Xiaochun Wu8Xin Lai9Daojiang Gao10College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaCollege of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaCollege of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaCollege of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaCollege of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaCollege of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaCollege of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaCollege of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaCollege of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaCollege of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaCollege of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, ChinaNowadays, Mn<sup>4+</sup>-activated fluoride red phosphors with excellent luminescence properties have triggered tremendous attentions for enhancing the performance of white light-emitting diodes (WLEDs). Nonetheless, the poor moisture resistance of these phosphors impedes their commercialization. Herein, we proposed the dual strategies of “solid solution design” and “charge compensation” to design K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<sub><i>x</i></sub>F<sub>7</sub> novel fluoride solid solution system, and synthesized the Mn<sup>4+</sup>-activated K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<sub><i>x</i></sub>F<sub>7</sub> (0 ≤ <i>x</i> ≤ 0.15, <i>x</i> represents the mol % of Mo<sup>6+</sup> in the initial solution) red phosphors via co-precipitation method. The doping of Mo<sup>6+</sup> not only significantly improve the moisture resistance of the K<sub>2</sub>NbF<sub>7</sub>: Mn<sup>4+</sup> phosphor without any passivation and surface coating, but also effectively enhance the luminescence properties and thermal stability. In particular, the obtained K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<i><sub>x</sub></i>F<sub>7</sub>: Mn<sup>4+</sup> (<i>x</i> = 0.05) phosphor possesses the quantum yield of 47.22% and retains 69.95% of its initial emission intensity at 353 K. Notably, the normalized intensity of the red emission peak (627 nm) for the K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<sub><i>x</i></sub>F<sub>7</sub>: Mn<sup>4+</sup> (<i>x</i> = 0.05) phosphor is 86.37% of its initial intensity after immersion for 1440 min, prominently higher than that of the K<sub>2</sub>NbF<sub>7</sub>: Mn<sup>4+</sup> phosphor. Moreover, a high-performance WLED with high CRI of 88 and low CCT of 3979 K is fabricated by combining blue chip (InGaN), yellow phosphor (Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>: Ce<sup>3+</sup>) and the K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<sub><i>x</i></sub>F<sub>7</sub>: Mn<sup>4+</sup> (<i>x</i> = 0.05) red phosphor. Our findings convincingly demonstrate that the K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<sub><i>x</i></sub>F<sub>7</sub>: Mn<sup>4+</sup> phosphors have a good practical application in WLEDs.https://www.mdpi.com/1420-3049/28/11/4566fluoridephosphorluminescence performancethermal stabilitymoisture resistance |
| spellingShingle | Yuhan Gao Lei Feng Linglin Wang Jun Zheng Feiyao Ren Siyu Liu Zhanglei Ning Ting Zhou Xiaochun Wu Xin Lai Daojiang Gao Novel Mn<sup>4+</sup>-Activated K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<i><sub>x</sub></i>F<sub>7</sub> (0 ≤ <i>x</i> ≤ 0.15) Solid Solution Red Phosphors with Superior Moisture Resistance and Good Thermal Stability Molecules fluoride phosphor luminescence performance thermal stability moisture resistance |
| title | Novel Mn<sup>4+</sup>-Activated K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<i><sub>x</sub></i>F<sub>7</sub> (0 ≤ <i>x</i> ≤ 0.15) Solid Solution Red Phosphors with Superior Moisture Resistance and Good Thermal Stability |
| title_full | Novel Mn<sup>4+</sup>-Activated K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<i><sub>x</sub></i>F<sub>7</sub> (0 ≤ <i>x</i> ≤ 0.15) Solid Solution Red Phosphors with Superior Moisture Resistance and Good Thermal Stability |
| title_fullStr | Novel Mn<sup>4+</sup>-Activated K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<i><sub>x</sub></i>F<sub>7</sub> (0 ≤ <i>x</i> ≤ 0.15) Solid Solution Red Phosphors with Superior Moisture Resistance and Good Thermal Stability |
| title_full_unstemmed | Novel Mn<sup>4+</sup>-Activated K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<i><sub>x</sub></i>F<sub>7</sub> (0 ≤ <i>x</i> ≤ 0.15) Solid Solution Red Phosphors with Superior Moisture Resistance and Good Thermal Stability |
| title_short | Novel Mn<sup>4+</sup>-Activated K<sub>2</sub>Nb<sub>1−<i>x</i></sub>Mo<i><sub>x</sub></i>F<sub>7</sub> (0 ≤ <i>x</i> ≤ 0.15) Solid Solution Red Phosphors with Superior Moisture Resistance and Good Thermal Stability |
| title_sort | novel mn sup 4 sup activated k sub 2 sub nb sub 1 i x i sub mo i sub x sub i f sub 7 sub 0 ≤ i x i ≤ 0 15 solid solution red phosphors with superior moisture resistance and good thermal stability |
| topic | fluoride phosphor luminescence performance thermal stability moisture resistance |
| url | https://www.mdpi.com/1420-3049/28/11/4566 |
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