Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

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Author: search.filters.author.Köseoğlu, HasanInstitution Author: search.filters.institutionAuthor.Özdemir, Mehtap

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  • Article
    Citation - WoS: 8
    Citation - Scopus: 8
    Development of Zto/Ag Transparent Electrodes for Thin Film Solar Cells
    (Springer, 2022) Türkoğlu, Fulya; Köseoğlu, Hasan; Özyüzer, Lütfi; Cantaş, Ayten; Özdemir, Mehtap; Aygün, Gülnur; Özdemir, Mehtap; 04.05. Department of Pyhsics; 04. Faculty of Science; 01. Izmir Institute of Technology
    This article presents the optimization of Zinc Tin Oxide/Silver/Zinc Tin Oxide (ZTO/Ag/ZTO) multilayers to implement them in thin film solar cells as transparent electrodes. To achieve improvements on the performance of these transparent multilayers, effect of Ag and ZTO thicknesses, and position of Ag layer within the multilayer were investigated. Electrical and optical characterization of these multilayers revealed that reduced sheet resistance and improved optical transmittance can be acquired for solar cells by the optimization of thin film thicknesses and position of the Ag within the multilayer. The improvement of the electrical and optical behavior of the ZTO/Ag/ZTO structures enabled figure of merit (FoM) values up to 69.69 × 10–3 Ω−1. The performance of our multilayer electrodes was also compared with ITO and AZO electrodes. The obtained results suggest that fabricated multilayer electrodes can be a good choice for thin film solar cells.
  • Article
    Citation - WoS: 31
    Citation - Scopus: 33
    The 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 Science
    In 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.