Investigation of optical properties of Bi12GeO20 sillenite crystals by spectroscopic ellipsometry and Raman spectroscopy

Basit Öğe Kaydı
dc.authorid0000-0001-5409-6528
dc.contributor.authorIşık, Mehmet
dc.contributor.authorDelice, Serdar
dc.contributor.authorGasanly, Nizami
dc.contributor.authorBagiev, Vidadi E.
dc.date.accessioned2020-03-04T11:21:31Z
dc.date.available2020-03-04T11:21:31Z
dc.date.issued2020en_US
dc.departmentHitit Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü
dc.description.abstractBi12GeO20 (BGO) compound is one of the fascinating members of sillenites group due to its outstanding photorefractive and photocatalytic characteristics. The present paper aims at investigating optical properties of BGO crystals by means of spectroscopic ellipsometry and Raman spectroscopy measurements. Bi12GeO20 single crystals grown by Czochralski method were structurally characterized by X-ray diffraction (XRD) experiments and the analyses showed that studied crystals have cubic crystalline structure. Raman spectrum exhibited 15 peaks associated with A, E and F modes. Spectroscopic ellipsometry measurement data achieved in the energy region between 1.2 and 6.2 eV were used in the air/sample optical model to get knowledge about complex pseudodielectric constant, pseudorefractive index, pseudoextinction and absorption coefficients of the crystals. Spectral change of real and imaginary part of complex pseudodielectric constant were discussed in detail. Band gap energy of Bi12GeO20 single crystals was calculated to be 3.18 eV using absorption coefficient dependency on photon energy. Critical point energies at which photons are strongly absorbed were determined by utilizing the second energy derivative spectra of components of complex pseudodielectric function. Fitting of both spectra resulted in the presence of four interband transitions with energies of 3.49, 4.11, 4.67 and 5.51 eV.
dc.description.provenanceSubmitted by Zeynep Umut Arslan (umutarslan@hitit.edu.tr) on 2020-03-04T11:21:06Z No. of bitstreams: 0en
dc.description.provenanceApproved for entry into archive by Zeynep Umut Arslan (umutarslan@hitit.edu.tr) on 2020-03-04T11:21:31Z (GMT) No. of bitstreams: 0en
dc.description.provenanceMade available in DSpace on 2020-03-04T11:21:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2020en
dc.identifier.citationIsik, M., Delice, S., Gasanly, N. M., Darvishov, N. H., Bagiev, V. E. (2020). Investigation of optical properties of Bi12GeO20 sillenite crystals by spectroscopic ellipsometry and Raman spectroscopy. Ceramics International.
dc.identifier.doi10.1016/j.ceramint.2020.02.056
dc.identifier.issn0272-8842
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.ceramint.2020.02.056
dc.identifier.urihttps://hdl.handle.net/11491/5773
dc.identifier.wosWOS:000551128800001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Ltd
dc.relation.ispartofCeramics International
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectSillenitesen_US
dc.subjectEllipsometryen_US
dc.subjectRamanen_US
dc.subjectOptical propertiesen_US
dc.titleInvestigation of optical properties of Bi12GeO20 sillenite crystals by spectroscopic ellipsometry and Raman spectroscopy
dc.typeArticle

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