Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6654
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dc.contributor.authorGökçe, Melis-
dc.contributor.authorŞentürk, Ufuk-
dc.contributor.authorUslu, Deniz K.-
dc.contributor.authorBurgaz, Gözde-
dc.contributor.authorŞahin, Yüksel-
dc.contributor.authorGökçe, Aytaç Gürhan-
dc.date.accessioned2018-01-08T08:27:43Z-
dc.date.available2018-01-08T08:27:43Z-
dc.date.issued2017-12-
dc.identifier.citationGökçe, M., Şentürk, U., Uslu, D. K., Burgaz, G., Şahin, Y., and Gökçe, A. G. (2017). Investigation of europium concentration dependence on the luminescent properties of borogermanate glasses. Journal of Luminescence, 192, 263-268. doi:10.1016/j.jlumin.2017.06.041en_US
dc.identifier.issn0022-2313-
dc.identifier.issn0022-2313-
dc.identifier.urihttp://doi.org/10.1016/j.jlumin.2017.06.041-
dc.identifier.urihttp://hdl.handle.net/11147/6654-
dc.description.abstractIn order to elucidate the effect of europium content on the optical and luminescent properties of borogermanate glasses, a series of Eu3+ doped 30B2O3-40GeO2-(30-x)Gd2O3 glasses with various doping levels (x=1–9 mol%) have been synthesized and studied with transmission, absorption, photoluminescence and decay time measurements. The transmission spectra proved that the title glasses maintained a high transparency about 80% in the 440 to 900 nm region. Based on the absorption spectra, the optical band gaps obtained from Tauc's plot can be narrowed by increasing content of Eu3+. From the photoluminescence spectra, the strongest red emission has been observed from the 5D0→7F2 level of Eu3+ ions in borogermanate glasses. The strongest emission and excitation intensities of Eu3+ ions are at the doping level of x=7 mol% and then these intensities decrease due to concentration quenching. The red to orange ratio (R/O) of 5D0→7F2 to 5D0→7F1 transitions has been investigated to predict the local environment of Eu3+ ions. Judd-Ofelt (J-O) analyses have been performed from the emission spectra. The values of R/O and Ω2 present an increase with increasing doping level, indicating the lower symmetric environment for Eu3+ ions and higher covalency for Eu-O bond. The emission efficiency calculated from J-O theory is 75% at x=2 mol%. The decay time curves of 6P7/2→8S7/2 transition of Gd3+ ions and 5D0–7F2 transition of Eu3+ ions confirm the energy transfer from Gd3+ to Eu3+ ions.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK 114M477)en_US
dc.language.isoenen_US
dc.publisherElsevier Ltd.en_US
dc.relation.ispartofJournal of Luminescenceen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectBorogermanate glassen_US
dc.subjectDecay timeen_US
dc.subjectEuropiumen_US
dc.subjectLuminescenceen_US
dc.titleInvestigation of europium concentration dependence on the luminescent properties of borogermanate glassesen_US
dc.typeArticleen_US
dc.institutionauthorŞentürk, Ufuk-
dc.departmentİzmir Institute of Technology. Materials Science and Engineeringen_US
dc.identifier.volume192en_US
dc.identifier.startpage263en_US
dc.identifier.endpage268en_US
dc.identifier.wosWOS:000413037400041en_US
dc.identifier.scopus2-s2.0-85021745220en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1016/j.jlumin.2017.06.041-
dc.relation.doi10.1016/j.jlumin.2017.06.041en_US
dc.coverage.doi10.1016/j.jlumin.2017.06.041en_US
dc.identifier.wosqualityQ2-
dc.identifier.scopusqualityQ2-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.grantfulltextopen-
Appears in Collections:Materials Science and Engineering / Malzeme Bilimi ve Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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