Investigation of defect levels in Bi12SiO20 single crystals by thermally stimulated current measurements

2021-12-01
Isik, M.
Delice, S.
Hasanlı, Nızamı
Bi12SiO20 (BSO) single crystal belongs to the sillenite semiconducting family known as defective compounds. The present paper investigates the defect centers in BSO grown by Czochralski method by means of thermally stimulated current (TSC) measurements performed in the 10-260 K range. The TSC glow curve obtained at heating rate of beta = 0.1 K s(-1) presented several peaks associated with intrinsic defect centers. The activation energies of defect centers were revealed as 0.09, 0.15, 0.18, 0.22, 0.34, 0.70 and 0.82 eV accomplishing the curve fit analyses method. The peak maximum temperatures and orders of kinetics of each deconvoluted peak were also determined as an outcome of fitting process. TSC experiments were expanded by making the measurements at various heating rates between 0.1 and 0.3 K s(-1) to get information about the heating rate dependent peak parameters.
PHYSICA SCRIPTA

Suggestions

Investigation of Fluorine Atom Effect on Benzothiadiazole Acceptor Unit in Donor Acceptor Donor Systems
Çakal, Deniz; Akdağ, Akın; Önal, Ahmet Muhtar (The Electrochemical Society, 2019-07-12)
Synthesis of two new pi-conjugated monomers containing fluorine substituted benzothiadiazoles as acceptor units and 3,4-ethylenedioxythiophene (EDOT) as donor unit was accomplished by facilitating Stille cross-coupling reactions (4,7-bis(2,3-dihydrothieno[3,4-b][1,4] dioxin-5-yl)-5-fluorobenzo[c][1,2,5] thiadiazole (E2BTD-F) and 4,7-bis(2,3-dihydrothieno [3,4-b][1,4] dioxin-5-yl)-5,6-difluorobenzo[c][1,2,5] thiadiazole (E2BTD-2F)). NMR and HRMS spectra of newly synthesized compounds are in agreement with th...
Construction of pyrrolo{1,2-a]pyranine structure by metal catalyzed cyclization on n-propargyl substituted pyrroles
Güven, Sinem; Balcı, Metin; Department of Chemistry (2013)
Pyrrolo[1,2-a]pyrazine is one of the isomers of pyrolodiazine family. Pyrrolo[1,2-a]pyrazine possesses a bicyclic heteroaromatic structure that have 10 electrons. It has various biological importances in synthetic chemistry; therefore, many different approaches to generate this skeleton have been developed so far. In this study, our prior aim was to develop a new synthetic methodology for the formation of pyrrolo[1,2-a]pyrazine moiety. In the first part of this focus, the starting compound, methyl 2-(2-meth...
Study of the structural and optical properties of thallium gallium disulfide (TlGaS2) thin films grown via thermal evaporation
Isik, M.; KARATAY, AHMET; Ech-Chergui, A.N.; Hasanlı, Nızamı (2022-07-01)
© 2022 IOP Publishing Ltd.Thallium gallium disulfide (TlGaS2) belonging to layered structured semiconducting family has been a significant compound due to its outstanding characteristics. Its layered characteristics take attention for two-dimensional (2D) material research area and thus TlGaS2 is known as promising layered compound to develop 2D materials for optoelectronic devices. To the best of our knowledge, the present work is the first one investigating TlGaS2 thin films grown by thermal evaporation m...
Investigation of thermoluminescence properties of metal oxide doped lithium triborate
Oezdemir, Zeynep; Yılmaz, Ayşen; Yılmaz, Aysun (2007-10-01)
In this study, lithium triborate (LiB3O5) doped with different metal oxides were investigated to explore its thermoluminescence properties. Solid-state reaction method was employed for the synthesis of the desired materials. The formation of the produced phases was confirmed by Powder X-Ray Diffraction (XRD), Infrared (IR), Differential Thermal Analysis (DTA) and Scanning Electron Microscopy (SEM) examinations. It was found that, CuO and Al2O3 doped lithium triborate samples exhibit very significant thermol...
Synthesis and modifications of polyprethanes for biomedical purposes
Hasırcı, Nesrin (2007-10-01)
Polyurethanes are known as a class of polymers with very high 'hemocompatible' properties. In this study polyurethanes were prepared in various compositions and in medical purity without using any solvent, catalyst or additives. For the synthesis of polyurethanes, toluene diisocynate, diphenylmethane diisocynate or hexamethylene diisocynate were used as diisocyanate compounds and polypropylene-ethylene glycol or polypropylene glycol were used as polyol compounds. The surfaces were modified with plasma glow-...
Citation Formats
M. Isik, S. Delice, and N. Hasanlı, “Investigation of defect levels in Bi12SiO20 single crystals by thermally stimulated current measurements,” PHYSICA SCRIPTA, vol. 96, no. 12, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/95018.