Yazar "Tomakin, Murat" için FEF, Fizik Bölümü Koleksiyonu listeleme
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Impact of in/ex situ annealing and reaction temperature on structural, optical and electrical properties of SnS thin films
Olgar, Mehmet Ali; Çiriş, Ali; Tomakin, Murat; Zan, Recep (Elsevier, 2021)In this work, SnS thin films were prepared by in situ and ex situ annealing process of precursor films deposited by RF (Radio Frequency) magnetron sputtering employing binary SnS target. In situ annealing treatment was ... -
Improved optical transparency of calcium-doped ZnO thin films
Polat, İsmail; Yılmaz, Sevim Savaşkan; Tomakin, Murat; Bacaksız, Emin (Natl Inst Optoelectronics, 2019)ZnO thin films with various Ca-doping contents were produced by spray pyrolysis. X-ray diffraction results showed that all samples had a hexagonal structure. Morphological analysis indicated that all films had granular ... -
Improved performance of CdS powder-based hybrid solar cells through surface modification
Ünverdi, Ahmet; Yılmaz, Salih; Tomakin, Murat; Polat, İsmail; Bacaksız, Emin (Gümüşhane Üniversitesi, 2021)The effects of surface modification of CdS through organic Eosin-Y, indoline D205, and Ru-based complex N719 and N3 dyes on CdS-based hybrid solar cells were studied. Chemical bath deposition (CBD) and doctor blade methods ... -
Improving photovoltaic characteristics of CdS-based hybrid solar cells through Mn incorporation
Doğan V.; Yılmaz S.; Tomakin, Murat; Töreli, S.B.; Polat İ.; Bacaksız E. (Elsevier, 2024)CdS thin films, both with and without Mn-doping, were grown via chemical bath deposition on indium tin oxide-coated glass substrates for application in hybrid solar cells. X-ray diffraction analysis revealed that Mn doping ... -
Improving solar cell efficiency through controlled annealing effects of TiO2 thin films
Kanmaz, İmran; Tomakin, Murat (Wiley, 2024)In the scope of this research, the impact of thermal annealing on the electrical and optical characteristics of TiO2 thin films is investigated through empirical analysis. Varied annealing temperatures are applied during ... -
Improving the stability of solar cells using metal-organic frameworks
Nevruzoğlu, Vagif; Demir, Selçuk; Karaca, Gökçehan; Tomakin, Murat; Bilgin, Nuray; Yılmaz, Fatih (Royal Soc Chemistry, 2016)Although Cu2S-containing chalcogenide solar cells are appealing and cost-effective for photovoltaics (PVs), these materials suffer from rapid performance degradation as a result of the diffusion of copper ions into the CdS ... -
Influence of copper composition and reaction temperature on the properties of CZTSe thin films
Olgar, Mehmet Ali; Atasoy, Yıldız; Başol, Bülent M.; Tomakin, Murat; Aygün, Gülnur; Özyüzer, Lütfi; Bacaksız, Emin (Elsevier Science Sa, 2016)In this study Cu2ZnSnSe4 (CZTSe) compound layers were grown using a two-stage technique that involved deposition of metallic precursors (Cu, Zn, and Sn) and Se in the first stage, followed by reaction of all the species ... -
Influence of deposition pressure of elemental Sn on structural, optical, electrical and schottky diode properties of SnS thin films grown by two-stage method
Çiriş, Ali; Atasoy, Yavuz; Tomakin, Murat; Olgar, Mehmet Ali (Springer, 2023)In the present study, SnS thin films were grown by two-stage method including sputtering deposition of elemental Sn films at various deposition pressures (6, 9, 12 ,15 and 18 mTorr) followed by sulfurization process carried ... -
Influence of pre-annealing Cu-Sn on the structural properties of CZTSe thin films grown by a two-stage process
Olgar, Mehmet Ali; Başol, Bülent M.; Tomakin, Murat; Seyhan, Ayşe; Bacaksız, Emin (Elsevier Sci Ltd, 2018)In this study CZTSe thin film were synthesized by a two-stage process that included sequential sputter deposition of Cu and Sn layers forming a Cu/Sn structure, pre-annealing the Cu/Sn structure at 200-380 degrees C for ... -
The influence of substrate temperature on electrical properties of Cu/CdS/SnO2 Schottky diode
Tomakin, Murat; Altunbaş, M.; Bacaksz, Emin (Elsevier, 2011)Polycrystalline CdS samples on the SnO2 coated glass substrate were obtained by vacuum evaporation method at low substrate temperatures (T S=200 and 300 K) instead of the commonly used vacuum evaporation at high substrate ... -
The influence of substrate temperature on the morphology, optical and electrical properties of thermal-evaporated ZnTe Thin Films
Bacaksız, Emin; Aksu, S.; Ozer, N.; Tomakin, Murat; Özçelik, A. (Elsevier, 2009)The structural, morphological, optical and electrical properties of ZnTe films deposited by evaporation were investigated as a function of substrate temperature (at -123 and 27 °C) and post-deposition annealing temperature ... -
Introduction of Co atoms into CdS thin films for improving photovoltaic properties
Yılmaz, S.; Doğan, V.; Tomakin, Murat; Töreli, S.B.; Polat, İ.; Bacaksız, Emin (Elsevier, 2024)This paper represents a systematic work on the fabrication of chemical bath-grown CdS films with and without Co atoms and their photovoltaic performances in hybrid solar cells. Structural properties showed 1% Co-doping ... -
Investigation of Cd1-xCoxS diluted magnetic semiconductor thin films fabricated by chemical bath deposition method
Tomakin, Murat; Öncel, Yılmaz; Keskenler, Eyüp Fahri; Nevruzoğlu, Vagif; Onuk, Zuhal; Görür, Osman (Elsevier Science Sa, 2014)Chemical bath deposition method was used for preparation of Cd1-xCoxS thin films. the effects of Co doping and thermal annealing on structural, optical, electrical and magnetic properties of CdS thin films were investigated. ... -
The investigation of magnetic levitation performances of single grain YBCO at different temperatures
Güner, Sait Barış; Çelik, Şükrü; Tomakin, Murat (Elsevier Science Sa, 2017)The temperature dependence of the magnetic levitation force has been investigated for single-grain YBCO bulk sample, 20 mm in diameter with a thickness of 8 mm, fabricated by top-seeded melt growth (TSMG) method using Nd123 ... -
The investigation of stability of n-CdS/p-Cu2S solar cells prepared by cold substrate method
Manir, Melih; Nevruzoğlu, Vagif; Tomakin, Murat (IOP Publishing, 2021)In this study, two different n-CdS/p-Cu2S solar cells were prepared by evaporating Cu at different substrate temperatures (200 K and 300 K) by vacuum evaporation method on a single crystal CdS semiconductor. Field emission ... -
An investigation on CdSeTe/CdTe stacks deposited by evaporation: Impact of Halide treatment depending on the applied surface
Çiriş, Ali; Atasoy, Yavuz; Tomakin, Murat; Bacaksız, Emin (Wiley, 2024)Among the methods applied to modify the characteristics of CdSeTe/CdTe stacks, one of the most well-known and widely used procedures is the CdCl2 halide treatment. In this connection, the influence of CdCl2 on microstructural ... -
Optical and electrical optimization of dysprosium-doped CdS thin films
Yılmaz, Salih; Polat, İsmail; Tomakin, Murat; Töreli, S. B.; Küçükömeroğlu, Tayfur; Bacaksız, Emin (Springer, 2018)As-grown and Dy-doped CdS thin films containing concentrations of 1, 2, 3, 4 and 5 at.% Dy atom were prepared via chemical spray route on glass substrates. the constructed thin films were searched through analyzing their ... -
Performance assessment of oxygenated CdS films-based photodetector
Polat, İ.; Yılmaz, S.,; Küçükömeroğlu, Tayfur; Tomakin, Murat; Bacaksız, Emin (Elsevier, 2024)dS films were grown by thermal evaporation on glass substrates. After growth process, samples were oxygenated at 400 °C at various gas pressures for 5 mins employing rapid thermal process. The produced CdS films were used ... -
Performance of Si-based solar cell utilizing optimized Al-doped ZnO films as TCO layer
Altuntepe, Ali; Erkan, Serkan; Hasret, Onur; Yagmyrov, Atajan; Yazıcı, Duygu; Tomakin, Murat; Olgar, Mehmet Ali; Zan, Recep (Springer, 2023)luminum-doped zinc oxide (AZO) is one of the most popular transparent conducting oxide layers that can be employed in many optoelectronic applications in particular in photovoltaic devices due to being a low-cost and ... -
Phase transformation in Cu2SnS3 (CTS) thin films through pre-treatment in sulfur atmosphere
Olgar, Mehmet Ali; Başol, Bülent M.; Tomakin, Murat; Bacaksız, Emin (Springer, 2021)In this study, Cu2SnS3 (CTS) thin films prepared by a two-step sulfurization process were characterized. Cu and Sn metallic layers were first deposited on glass substrates by sputtering and then annealed in-situ while in ...