Synthesis of h-BN encapsulated spherical core-shell structured SiO2@Sr2Si5N8:Eu2+ red phosphors
| dc.contributor.author | Tang J. Y., Yang L. X., Zhan C., Hao L. Y., Xu X., Agathopoulos S. | en |
| dc.date.accessioned | 2015-11-24T17:39:13Z | |
| dc.date.available | 2015-11-24T17:39:13Z | |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/14610 | |
| dc.rights | Default Licence | - |
| dc.subject | Inorganic compounds, Optical materials, Sol gel growth, Optical properties | en |
| dc.title | Synthesis of h-BN encapsulated spherical core-shell structured SiO2@Sr2Si5N8:Eu2+ red phosphors | en |
| heal.abstract | A facile method was designed for the successful synthesis of highly stable spherical (oxo)nitridosilicate phosphors with excellent monodispersity, high coating density and improved luminescent properties. The novel h-BN-encapsulated spherical core shell SiO2@Sr2Si5N8:Eu2+ red emitting phosphors were successfully synthesized by an interfacial reaction mechanism followed by a subsequent gas reduction and nitridation process. A thin film of hexagonal boron nitride (h-BN) was formed in situ during the synthesis process, leading to core shell SiO@Sr2Si5N8:Eu2+ phosphors with a perfectly spherical shape, narrow size distribution, non-agglomeration and a smooth surface. The particles consist of three layers: the outer h-BN film; the middle Sr2Si5N8:Eu2+ phosphor shell and the amorphous SiO2 core. Under UV and blue light excitation, the SiO2@Sr2Si5N8:Eu2+ phosphors show intense red emission due to the 4f65d 4f7 transition of the Eu2+ ions. Furthermore, this method is superior to the traditional gas reduction and nitridation method because of the lower temperature at which synthesis occurs. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | 10.1016/j.matchemphys.2011.12.073 | - |
| heal.identifier.secondary | http://www.sciencedirect.com/science/article/pii/S0254058411011011 | - |
| heal.journalName | Materials Chemistry and Physics | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2012 | - |
| heal.publisher | Elsevier | en |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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