Greenish-yellow emission from rare-earth free Li+ doped zinc vanadate phosphor
In this article, we present synthesis and spectral study of Zn(3-x)Lix(VO4)2 (x = 0, 0.01, 0.02, 0.03) samples. The orthorhombic phase of all the samples is validated by their XRD pattern. The crystallinity of Zn3(VO4)2 is improved by doping Li+ ions and is supported by the augmentation in crystalli...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-08-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379722003771 |
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| author | Vaibhav Chauhan Pratik Deshmukh S. Satapathy Praveen C. Pandey |
| author_facet | Vaibhav Chauhan Pratik Deshmukh S. Satapathy Praveen C. Pandey |
| author_sort | Vaibhav Chauhan |
| collection | DOAJ |
| description | In this article, we present synthesis and spectral study of Zn(3-x)Lix(VO4)2 (x = 0, 0.01, 0.02, 0.03) samples. The orthorhombic phase of all the samples is validated by their XRD pattern. The crystallinity of Zn3(VO4)2 is improved by doping Li+ ions and is supported by the augmentation in crystallite size. The absorption band of the phosphors covers the near-UV region. The XPS analysis ascertains the V+5 oxidation state of vanadium thereby confirming the single-phase of the phosphors. The Li+ ion doping enhances the broadband excitation in the near UV region and emission band of Zn3(VO4)2 in the visible region with stokes shift of 9517.3 cm−1. The increased PL lifetime of the emission bands is observed after Li+ ion doping. The calculated activation energy of Li+ doped Zn3(VO4)2 phosphor is 0.29 eV and there is a 44% loss of emission intensity at 150 °C. Thus, with the broadband near-UV excitation and greenish-yellow emission, the Li+ doped zinc vanadate phosphor can be utilized with near-UV LED chips for the realization of white light. |
| first_indexed | 2024-12-12T01:40:11Z |
| format | Article |
| id | doaj.art-acd2ed70d76a42f7b5c7fec23f2336e7 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-12-12T01:40:11Z |
| publishDate | 2022-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-acd2ed70d76a42f7b5c7fec23f2336e72022-12-22T00:42:44ZengElsevierResults in Physics2211-37972022-08-0139105689Greenish-yellow emission from rare-earth free Li+ doped zinc vanadate phosphorVaibhav Chauhan0Pratik Deshmukh1S. Satapathy2Praveen C. Pandey3Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, U.P., IndiaFunctional Bio-Materials Lab., Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, IndiaFunctional Bio-Materials Lab., Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, IndiaDepartment of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, U.P., India; Corresponding author.In this article, we present synthesis and spectral study of Zn(3-x)Lix(VO4)2 (x = 0, 0.01, 0.02, 0.03) samples. The orthorhombic phase of all the samples is validated by their XRD pattern. The crystallinity of Zn3(VO4)2 is improved by doping Li+ ions and is supported by the augmentation in crystallite size. The absorption band of the phosphors covers the near-UV region. The XPS analysis ascertains the V+5 oxidation state of vanadium thereby confirming the single-phase of the phosphors. The Li+ ion doping enhances the broadband excitation in the near UV region and emission band of Zn3(VO4)2 in the visible region with stokes shift of 9517.3 cm−1. The increased PL lifetime of the emission bands is observed after Li+ ion doping. The calculated activation energy of Li+ doped Zn3(VO4)2 phosphor is 0.29 eV and there is a 44% loss of emission intensity at 150 °C. Thus, with the broadband near-UV excitation and greenish-yellow emission, the Li+ doped zinc vanadate phosphor can be utilized with near-UV LED chips for the realization of white light.http://www.sciencedirect.com/science/article/pii/S2211379722003771Zinc vanadateRare-earth free phosphorsThermal stabilityLi+ ionPhotoluminescence |
| spellingShingle | Vaibhav Chauhan Pratik Deshmukh S. Satapathy Praveen C. Pandey Greenish-yellow emission from rare-earth free Li+ doped zinc vanadate phosphor Results in Physics Zinc vanadate Rare-earth free phosphors Thermal stability Li+ ion Photoluminescence |
| title | Greenish-yellow emission from rare-earth free Li+ doped zinc vanadate phosphor |
| title_full | Greenish-yellow emission from rare-earth free Li+ doped zinc vanadate phosphor |
| title_fullStr | Greenish-yellow emission from rare-earth free Li+ doped zinc vanadate phosphor |
| title_full_unstemmed | Greenish-yellow emission from rare-earth free Li+ doped zinc vanadate phosphor |
| title_short | Greenish-yellow emission from rare-earth free Li+ doped zinc vanadate phosphor |
| title_sort | greenish yellow emission from rare earth free li doped zinc vanadate phosphor |
| topic | Zinc vanadate Rare-earth free phosphors Thermal stability Li+ ion Photoluminescence |
| url | http://www.sciencedirect.com/science/article/pii/S2211379722003771 |
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