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Browsing by Author "Tarhan, Enver"
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The effect of thickness of silver thin film on structural and optical properties of porous silicon
Çetinel, A.; Özdoğan, M.; Utlu, G.; Artunç, N.; Şahin, G.; Tarhan, Enver (World Scientific Publishing, 2017-08)In this study, porous silicon (PS) samples were prepared on n-type silicon (100) wafers by electrochemical etching method, varying the current density from 20 to 100mA/cm2 and keeping constant HF concentration (10%) and ... -
Growth of Cu2ZnSnS4 absorber layer on flexible metallic substrates for thin film solar cell applications
Yazıcı, Şebnem; Olgar, Mehmet Ali; Akça, Fatime Gülşah; Cantaş, Ayten; Kurt, Metin; Aygün, Gülnur; Tarhan, Enver; Yanmaz, Ekrem; Özyüzer, Lütfi (Elsevier, 2015-08)In this work, Cu2ZnSnS4 (CZTS) absorber layers were fabricated using a two-stage process. Sequentially deposited Cu-Zn-Sn thin film layers on metallic foils were annealed in an Ar + S2(g) atmosphere. We aimed to investigate ... -
Importance of CdS buffer layer thickness on Cu2ZnSnS4-based solar cell efficiency
Cantaş, Ayten; Türkoğlu, Fulya; Meriç, Ece; Akça, Fatime Gülşah; Özdemir, Mehtap; Tarhan, Enver; Özyüzer, Lütfi; Aygün, Gülnur (Institute of Physics Publishing, 2018-06)Cu2ZnSnS4 (CZTS) thin films were grown on Mo-coated soda lime glass (SLG) substrates by the sulfurization of DC magnetron-sputtered Zn, Sn and Cu metallic precursors under a sulfur atmosphere at 550 °C for 45 min. Understanding ... -
Influence of applied current density on the nanostructural and light emitting properties of n-type porous silicon
Çetinel, A.; Artunç, N.; Şahin, G.; Tarhan, Enver (World Scientific Publishing, 2015-06)Effects of current density on nanostructure and light emitting properties of porous silicon (PS) samples were investigated by field emission scanning electron microscope (FE-SEM), gravimetric method, Raman and photoluminescence ... -
Investigation of gas sensing properties of nanoparticles functionalized with ferrocene molecules
Güzelaydın, Abdurrahman Halis (Izmir Institute of Technology, 2013)In this study, gas sensing properties of ferrocene functionalized multi-wall carbon nanotubes (MWCNT) and iron oxide nanoparticles were investigated via acoustic wave and electrical based techniques. Commercially obtained ... -
Investigation of the structure of alpha-lactalbumin protein nanotubes using optical spectroscopy
Tarhan, Özgür; Tarhan, Enver; Harsa, Şebnem (Cambridge University Press, 2014-02)Alpha-lactalbumin (α-la) is one of the major proteins in whey. When partially hydrolysed with Bacillus licheniformis protease, it produces nanotubular structures in the presence of calcium ions by a self-assembly process. ... -
Origin of a localized vibrational mode in a GaSb substrate with a MBE-grown ZnTe epilayer
Kim, Hyunjung; Tarhan, Enver; Chen, G.; Ramdas, A. K.; Sciacca, M. D.; Gunshor, R. L. (IOP Publishing, 2006-09)A localized vibrational mode (LVM) with a remarkable fine structure is observed in the infrared transmission spectrum of a ZnTe epilayer grown with molecular beam epitaxy (MBE) on a GaSb substrate. On the basis of the Zn ... -
The structural, optical and morphological properties of CaF2 thin films by using Thermionic Vacuum Arc (TVA)
Çetin, N. Emre; Korkmaz, Şadan; Elmas, Saliha; Ekem, Naci; Pat, Suat; Balbaǧ, M. Zafer; Tarhan, Enver; Temel, Sinan; Özmumcu, Murat (Elsevier, 2013-01)In this study, calcium fluoride (CaF2) thin films have been prepared by Thermionic Vacuum Arc (TVA) technique on glass substrates. In this technique CaF2 thin films are produced by condensing the plasma of anode material ...
