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10th Edition of World Nanotechnology Conference

March 10-12, 2025

March 10 -12, 2025 | Rome, Italy
World Nano 2022

Getachew Feyissa Gemeda

Getachew Feyissa Gemeda, Speaker at Nanoscience conferences
National Taiwan University of Science and Technology, Taiwan
Title : Heterojunction of zinc oxides of nanowires, and nanoparticles for dye synthesis solar cell


ZnO-nanowire and nanoparticles are used for the photonics, solar cells, and photovoltaic devices, and the composites were characterized. ZnO-nanowire, ZnO-nanoparticles, and Cdots were synthesized by hydrothermal, polyol solvent, and hydrothermal methods, respectively. ZnO nanowires and nanoparticles have been evaluated the effects of added carbon dots (C-dots) on the performance of photovoltaic devices. The photovoltaic conversion of dye-sensitized solar cells (DSSCs) was effective for ZnO NW/ZnO NP (75 wt%) and the incorporation of 10 wt% Cdots in the hybrid nanostructures. Additionally, when the mole ratio (ethylene diamine: citric acid) between raw materials of C-dots was 1:2, the conversion efficiency was highest, and this value was 6 times higher than that of DSSCs ZnO NW/ZnO NP (75 wt%) without C-dots. Electrochemical impedance spectroscopy also indicated that the charge transfer resistance property was lowest for Cdots (1:2)-hybridized ZnO NW/ZnO NP (75 wt%) DSSCs.


Getachew Feyissa Gemeda was born on June.12, 1985 GC in Oromia, Ethiopia from Feyissa Gemeda Balcha and Abebech Jimma Bedane. He graduated with BE.d (physics) from Haramaya University in 2008, and MSc in Condensed Matter (physics) in 2016 from Addis Ababa University. He has been teaching physics from Asella College since 2017 and lecturer, Bule Hora University, Bule Hora, Ethiopia, and joined the National Taiwan University of Science and Technology in 2019 to study his Ph.D. program in Material Science and Engineering focused on Nanotechnology application (Solar cell energy) and Two manuscripts are under review.