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Milićević B, Chen Y, Li J, Dramićanin MD, Zhou J, Wu M. Organic solvent-assisted co-precipitation synthesis of red-emitting K 2TiF 6:Mn phosphors with improved quantum efficiency and optimized morphology. Dalton Trans 2022; 51:1378-1383. [PMID: 34985065 DOI: 10.1039/d1dt03679c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report an organic solvent-assisted (OSA) co-precipitation strategy for the production of Mn4+-activated K2TiF6 phosphor. The phosphor particle size was controlled through the selection of organic solvents with an alcohol functional group and different carbon chain lengths used in the synthesis. The synergistic effect of the organic solvent and hydrofluoric acid results in large smoothed hexagonal-shaped crystal sheets of particles that become larger as the carbon chain length of the organic solvent increases. The photoluminescence (PL) properties of K2TiF6:Mn powders strongly depend on the size and thickness of the particles. The addition of n-butanol during the synthesis increases the emission intensity of K2TiF6:Mn by 208%. The PL quantum efficiency of phosphors prepared using the n-butanol-assisted strategy is much higher (98.2%) than that of conventionally prepared phosphors (89.9%). Our findings demonstrate a way to prepare the K2TiF6:Mn phosphor with targeted morphology and very high quantum efficiency and also provide the route for the optimization of all Mn4+-activated fluoride phosphors used in white light-emitting diodes.
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Affiliation(s)
- Bojana Milićević
- School of Marine Sciences/School of Chemistry, Sun Yat-Sen University, Zhuhai 519082/Guangzhou 510275, P. R. China. .,Vinca Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, PO Box 522, 11001 Belgrade, Serbia
| | - Yingyuan Chen
- School of Marine Sciences/School of Chemistry, Sun Yat-Sen University, Zhuhai 519082/Guangzhou 510275, P. R. China.
| | - Junhao Li
- Guangdong Province Key Laboratory of Rare Earth Development and Application, Institute of Rare Metals, Guangdong Academy of Sciences, Guangzhou 510651, P. R. China
| | - Miroslav D Dramićanin
- Vinca Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, PO Box 522, 11001 Belgrade, Serbia
| | - Jianbang Zhou
- School of Marine Sciences/School of Chemistry, Sun Yat-Sen University, Zhuhai 519082/Guangzhou 510275, P. R. China.
| | - Mingmei Wu
- School of Marine Sciences/School of Chemistry, Sun Yat-Sen University, Zhuhai 519082/Guangzhou 510275, P. R. China.
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Pang G, Hong F, Liu X, Zhang Y, Zhang C, Dong T, Fu Z, Liu G, Wang J, Li D, Dong X. Moisture-resistant Nb-based fluoride K 2NbF 7:Mn 4+ and oxyfluoride phosphor K 3(NbOF 5)(HF 2):Mn 4+: synthesis, improved luminescence performance and application in warm white LEDs. Dalton Trans 2021; 50:17290-17300. [PMID: 34787146 DOI: 10.1039/d1dt03341g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, high-efficiency Nb-based oxyfluoride K3(NbOF5)(HF2):Mn4+ and fluoride K2NbF7:Mn4+ phosphors were successfully synthesized using different amounts of HF acid solutions by a simple co-precipitation method. XRD, SEM and EDS were used to characterize the crystal structure, morphology and elemental composition of the phosphors. The emission spectra, excitation spectra and luminescence decay curves were used to study the luminescence characteristics of the samples. The thermal stability of the phosphors was tested and the mechanism of temperature quenching was discussed. Meanwhile, the moisture resistance and application of the phosphors were investigated in detail. The results show that the K3(NbOF5)(HF2):Mn4+ phosphor has stronger luminous intensity, lower color temperature, and better moisture resistance compared with the K2NbF7:Mn4+ phosphor. The correlated color temperature (CCT) and color rendering index (CRI) of warm white LEDs can be significantly improved by using the K3(NbOF5)(HF2):Mn4+ (CCT = 3430 K, CRI = 87.3) phosphor as a red light component. So the K3(NbOF5)(HF2):Mn4+ phosphor has broader application prospect in the field of warm white LEDs.
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Affiliation(s)
- Ge Pang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, P.R. China.
| | - Feng Hong
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, P.R. China.
| | - Xiaoyi Liu
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, P.R. China. .,College of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, P.R.China
| | - Yunxiao Zhang
- Tianjin Jinhang Technical Physics Institute, Tianjin, 300073, P.R. China
| | - Chunyan Zhang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, P.R. China.
| | - Tengri Dong
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, P.R. China.
| | - Zhendong Fu
- Tianjin Jinhang Technical Physics Institute, Tianjin, 300073, P.R. China
| | - Guixia Liu
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, P.R. China.
| | - Jinxian Wang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, P.R. China.
| | - Dan Li
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, P.R. China.
| | - Xiangting Dong
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, P.R. China.
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Hong F, Pang G, Diao L, Fu Z, Liu G, Dong X, Yu W, Wang J. Local structure modulation of Mn4+-doped Na2Si1−yGeyF6 red phosphors for enhancement of emission intensity, moisture resistance, thermal stability and application in warm pc-WLEDs. Dalton Trans 2020; 49:13805-13817. [DOI: 10.1039/d0dt02935a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Mn4+-doped Na2Si1−yGeyF6 red phosphors with efficient water and thermal stabilities were synthesized for high-performance warm pc-WLEDs.
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Affiliation(s)
- Feng Hong
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province
- Changchun University of Science and Technology
- Changchun 130022
- P. R. China
- College of Materials Science and Engineering
| | - Ge Pang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province
- Changchun University of Science and Technology
- Changchun 130022
- P. R. China
| | - Lijuan Diao
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province
- Changchun University of Science and Technology
- Changchun 130022
- P. R. China
| | - Zhendong Fu
- Tianjin Jinhang Technical Physics Institute
- Tianjin
- P. R. China
| | - Guixia Liu
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province
- Changchun University of Science and Technology
- Changchun 130022
- P. R. China
| | - Xiangting Dong
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province
- Changchun University of Science and Technology
- Changchun 130022
- P. R. China
| | - Wensheng Yu
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province
- Changchun University of Science and Technology
- Changchun 130022
- P. R. China
| | - Jinxian Wang
- Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province
- Changchun University of Science and Technology
- Changchun 130022
- P. R. China
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