Dr. Hasan KÖTENAssociate Professor, Head of Mechanical Engineering Department,
Istanbul Medeniyet University, Turkey
Speech Title: Special Applications in the Nanomaterial Technology
Abstract: In this study different nanostructures have been synthesized and deposited on p-type porous silicone to investigate their photovoltaic properties. The morphology of the synthesized structures has been investigated via scanning electron microscopy and it has been determined that the structures are in the nanoscale. Energy dispersive spectroscopy has been used to investigate the composition of the synthesized structures, and it has been determined that they have defects. The absorption measurements have been performed by ultraviolet-visible spectrophotometry. Based on these absorption measurements, the band gaps of the nanostructures have been calculated as 3.11 eV for spherical ZnO, 3.12 eV for flowers ZnO and 3.64 eV for ZnS. The nanostructures were deposited to obtain thin films in different thicknesses by using a spin-coating method on porous p-type silicone substrates, and then the photovoltaic and electrical properties were investigated. According to the obtained experimental results, it has been determined that the photovoltaic properties of the sample depend on the film thickness. Consequently, ZnS and n-type ZnO nanostructures have been synthesized by a sol-gel method and it has been found that they have photovoltaic properties.
Biography: Assoc. Prof. Hasan KOTEN graduated from Mechanical Engineering Department with honor of degree in 2007. At the same time, he received a BSc degree in Electrical and Electronics Engineering Department as a double major. Hasan KOTEN worked in the first full geometry engine design project for The Scientific and Technological Research Council of Turkey (TUBITAK). During his Ph.D., he worked as a visiting scholar at the Ohio State University Center for Automotive Research (CAR). Hasan KÖTEN also worked as a consultant for TUBITAK Domestic Electric Vehicle Design project in 2017. He attended to CEDP group at Brunel University as a post-doctorate researcher in 2018. Assoc. Prof. Hasan KÖTEN is Head of Mechanical Engineering of Istanbul Medeniyet University, currently. He leaded number of projects, MSc and PhD thesis in this combustion field. He attended and presented more than 100 conference proceedings and published about 30 articles indexed in SCI and SCI-e. He is awarded by TUBITAK 2238 programme with first degree over all national PhD thesis applications.