Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Article Citation - Scopus: 1Investigation of LiCoO2 Thin Films Grown Under Relatively Low Substrate Temperature for All Solid State Lithium Ion Battery Applications(Pergamon-elsevier Science Ltd, 2025) Ozcan, Polatkan; Esen, Nazlican; Cantas, Ayten; Ozyuzer, Lutfi; Ozdemir, Mehtap; Kosiel, Kamil; Aygun, GulnurThis study examines the effect of substrate temperature on the surface, structural and chemical properties of LiCoO2 (LCO) thin films deposited via magnetron sputtering. LCO thin films were grown for the purpose of being a cathode layer for all-solid-state lithium-ion batteries (ASSLIBs). Achieving crystalline LCO films at low substrate temperatures is advantageous for integration with flexible and temperature-sensitive substrates as well as minimizing energy consumption, which is highly important for industrial applications. In this work, LCO thin films were deposited on titanium-coated soda lime glass (SLG/Ti) at the substrate temperature ranging from room to 350 degrees C. Structural characterizations by XRD analyses confirmed that LCO thin films have (104) crystal orientation, which is critical for efficient lithium-ion transportation. SEM, Raman, and XPS analyses were used for further chemical and structural characterizations of grown LCO thin films. These analyses showed that LCO thin film grown at relatively low substrate temperature of 250 degrees C is a better growth condition when compared to others. Crystallization orientation (104) of LCO thin films is highly important for the potential usage of ASSLIBs technologies without any need of elevated temperatures. Moreover, results support the low-temperature adaption processes for applications like wearable electronics, offering safer and more sustainable solutions for future energy storage systems.Conference Object Citation - Scopus: 2The Effect of Ar Gas Flow Rate on Structure and Optical Properties of Magnetron Sputtered Sb2se3thin Films for Solar Cells(Institute of Electrical and Electronics Engineers Inc., 2020) Gundogan,S.H.; Ozyuzer,L.; Aygun,G.; Cantas,A.Recently, antimony selenide (Sb2Se3) absorber layer attracts so much attention in photovoltaic industry since it contains earth abundant, low cost and non-Toxic elements contrary to other chalcogenide based solar cells. In the present work, Sb2Se3 absorber films were grown by radio-frequency (RF) magnetron sputtering technique using binary single target and employing various argon flow rates, and then they were annealed under argon atmosphere inside a tubular furnace. Sb2Se3 thin films were investigated using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy, and UV-VIS NIR spectrophotometer. The effects of argon flow rate, one of the sputtering parameters, on the properties of the Sb2Se3 films were investigated. The significance of argon flow rate, that used during film deposition, on the observing of Se loss, antimony oxide formation and the change in the surface morphology was also addressed. We observed that the dominant crystal orientation varied with respect to argon flow rate. It was further detected that high argon flow rates cause the decomposition of Sb2Se3 structure and formation of antimony oxide phase. The overall analyses revealed that argon flow rate used while sputtering is effective in changing the structural, and optical properties of the Sb2Se3 thin films. © 2020 IEEE.