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Uyanık, Zemzem
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01. Izmir Institute of Technology
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3
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8455/1989
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35
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11.67
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1
| Journal | Count |
|---|---|
| Journal of Vacuum Science and Technology B | 1 |
| Renewable Energy | 1 |
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Master Thesis Improvement of Transparent Conductive Hybrid Ito/Ag Electrodes by Electro-Annealing(Izmir Institute of Technology, 2019) Uyanık, Zemzem; Uyanık, Zemzem; Aygün, Gülnur; Aygün Özyüzer, Gülnur; 04.05. Department of Pyhsics; 01. Izmir Institute of Technology; 04. Faculty of ScienceHibrit ITO/Ag/ITO (IAI) ince film tabaka yapılarının optik ve elektriksel performansları, ITO ve Ag katmanı kalınlığının fonksiyonu olarak incelenmiştir. Hibrit IAI ince filmleri borosilikat cam üzerine oda sıcaklığında yüksek vakum altında dc mıknatıssal saçtırma yöntemi ile üretilmiştir. Hibrit yapıdaki ITO, Ag, ITO filmlerin kalınlığı düşük tabaka direncine ve yüksek optik geçirgenliğe sahip olacak şekilde ayarlanmıştır. ITO katmanları arasındaki gömülü metal Ag katmanı, 10 nm ile 25 nm arasında değişen kalınlıklarda kullanılmıştır. IAI tabakası analiz edildikten sonra IAI ince filmlerin kristalliğini iyileştirmek için elektro-tavlama uygulanmıştır ve elektrik akımının IAI ince filmler üzerindeki etkisinin araştırılmasıyla elektronik cihaz ömrünün arttırılması amaçlanmıştır. Elektro-tavlamanın endüstriyel uygulamalar için daha uygun bir teknik olduğu sonucuna varılmıştır. IAI ince filmin yüzey direnci elektro-tavlama işleminden sonra 8.7 Ω/□ olarak bulunmuştur en yüksek geçirgenliğe ise 88.9% da ulaşılmıştır. Hibrit IAI ince filmlerin optoelektronik özellikleri, ITO film kristalliğini etkileyen ara katman olan metal Ag kalınlığına bağlıdır. Hibrit IAI ince filmlerinin yapısal özellikleri, CuK����� radyasyonuna sahip (�����=0.154 nm) X-ışını kırınımı (XRD) (Philips X'Pert Pro) ile tavlama sıcaklığının fonksiyonu olarak karakterize edilmiştir. IAI ince filmlerinin morfolojisi hakkında bilgi taramalı elektron mikroskobu (SEM) ile elde edilmiştir. IAI ince filmin optik geçirgenliği 200-2600 nm dalga boyu aralığına sahip PerkinElmerLambda 950 UV/Vis/NIR Spektrofotometre ile ölçülmüştür. Yüzey direnci ölçümleri için Keithley 2424 kaynak metrisi kullanılarak dört nokta yöntemi uygulanmıştır.Article Citation - WoS: 4Citation - Scopus: 5Enhanced Optoelectronic Properties of Magnetron Sputtered Ito/Ag Multilayers by Electro-Annealing(AVS, 2022) Uyanık, Zemzem; Türkoğlu, Fulya; Demirhan, Yasemin; Ekmekçioğlu, Merve; Ata, Bengü; Ata, Bengü; Özdemir, Mehtap; Aygün, Gülnur; Uyanık, Zemzem; Özdemir, Mehtap; Aygün, Gülnur; Özyüzer, Lütfi; 04.05. Department of Pyhsics; 01. Izmir Institute of Technology; 04. Faculty of ScienceIndium tin oxide/silver/indium tin oxide (ITO/Ag/ITO) multilayers have attracted much attention to fulfill the growing need for high-performance transparent conducting oxide electrodes. To make these transparent multilayers work better, electro-annealing, which is a method of self-heating by electric current, can be effective. Moreover, the effect of current on ITO/Ag/ITO multilayers should be investigated to make sure that electronic devices will be reliable over their lifetime. In this study, ITO/Ag/ITO multilayer electrodes with varying Ag thicknesses were grown by DC magnetron sputtering at room temperature. Structural, optical, and electrical properties of these multilayers were investigated before and after electro-annealing. Measurement results revealed that improved optical transmittance and sheet resistance can be obtained by the optimization of Ag thickness for the as-grown ITO/Ag/ITO layers. The highest figure of merit (FoM) value of 17.37 × 10−3 Ω−1 with optical transmittance of 85.15% in the visible region and sheet resistance of 11.54 Ω/□ was obtained for the Ag thickness of 16.5 nm for as-grown samples. The electro-annealing of as-grown ITO/Ag/ITO multilayers led to improved optical behavior of the multilayer structure over a wide spectral range, especially in the near-infrared range. Electro-annealing also provided an improvement in the crystallinity and sheet resistance of the electrodes. The improvement of the electrical and optical properties of the structure enabled a FoM of 23.07 × 10−3 Ω−1 with the optical transmittance of 86.80% in the visible region and sheet resistance of 10.52 Ω/□. The findings of this work provide proper knowledge of the properties of ITO/Ag/ITO multilayers under electrical current and suggest that the overall performance of the multilayers can be improved by the electro-annealing process.Article Citation - WoS: 31Citation - Scopus: 33The Controllable Deposition of Large Area Roll-To Sputtered Ito Thin Films for Photovoltaic Applications(Elsevier, 2020) Demirhan, Yasemin; Uyanık, Zemzem; Köseoğlu, Hasan; Özyüzer, Lütfi; Türkoğlu, Fulya; Özdemir, Mehtap; Uyanık, Zemzem; Demirhan, Yasemin; Özdemir, Mehtap; Aygün, Gülnur; Aygün, Gülnur; Özyüzer, Lütfi; 04.05. Department of Pyhsics; 01. Izmir Institute of Technology; 04. Faculty of ScienceIn the present study, using a large area roll-to-roll DC magnetron sputtering system deposition of ITO thin films on polyethylene terephthalate (PET) substrates were achieved. In order to investigate the effect of growth conditions on the film properties all through the deposition process, optical emission spectroscopy (OES) analysis have been accomplished in a governable way. The consequences of Oxygen partial pressure and film thickness on electrical, and optical properties of the films were determined. It was shown that the intensity of optical emission peaks are subjected to the discharge power and as well as the O-2/Ar flow ratio. Large area, uniform ITO films with relatively high transparency and low electrical resistivity (R(2)(<)50 Omega/sqr) were succesfully deposited on PET substrates. The significance of both the figure of merit (FOM) and the optical band gap values on the performance of different TCO thin films were addressed. In this work, the obtained results suggest that the overall performance is sufficient to implement the ITO films in photovoltaic and OLED applications. (C) 2019 Elsevier Ltd. All rights reserved.