{"title":"Blue emission stimulated by Dy3+ transitions in KCaF3: A fluoride-based phosphor","authors":"Vanthini Nelson Adoons , Thandeka Molefe , Nkosinathi Sangweni , Delicacy NtshaliNtshali , Sipho Nyawo","doi":"10.1016/j.mlblux.2024.100237","DOIUrl":null,"url":null,"abstract":"<div><div>In this work, the luminescence characteristics of KCaF<sub>3</sub>:xDy<sup>3+</sup> phosphors are examined. A solid-state method was used to synthesize the phosphors. KCaF<sub>3</sub>:xDy<sup>3+</sup> phosphors with orthorhombic structure were confirmed by X-ray diffraction (XRD). Scanning electron microscope (SEM) images of the synthesized phosphors show agglomerated particles with irregular shapes. The composition of the synthesized sample was determined by the energy dispersive spectroscopy (EDS) spectra, and the spectra showed the presence of all elements in the grown phosphors. Photoluminescence (PL) studies revealed peaks at 486 and 578 nm, corresponding to blue and yellow emissions. The Commission Internationale de l’Éclairage (CIE) diagram illustrates that Dy3<sup>+</sup>-doped KCaF<sub>3</sub> phosphors are clustered in the blue color region.</div></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"25 ","pages":"Article 100237"},"PeriodicalIF":2.6000,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Letters: X","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2590150824000103","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/12/15 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In this work, the luminescence characteristics of KCaF3:xDy3+ phosphors are examined. A solid-state method was used to synthesize the phosphors. KCaF3:xDy3+ phosphors with orthorhombic structure were confirmed by X-ray diffraction (XRD). Scanning electron microscope (SEM) images of the synthesized phosphors show agglomerated particles with irregular shapes. The composition of the synthesized sample was determined by the energy dispersive spectroscopy (EDS) spectra, and the spectra showed the presence of all elements in the grown phosphors. Photoluminescence (PL) studies revealed peaks at 486 and 578 nm, corresponding to blue and yellow emissions. The Commission Internationale de l’Éclairage (CIE) diagram illustrates that Dy3+-doped KCaF3 phosphors are clustered in the blue color region.
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