Influence of Cerium on The Structure and Optical Properties of Molydenum disulfide Grown Using DC-Unbalanced Magnetron Sputtering Aljufri Hadju (a), Azrul Kiromil Enri Auni (a), Indris Sarihon Sianturi (a), Valensius Nathanael Huangtama (a), Ridwan Muhammad Syahrul (a), Yudi Darma (a*)
a) Quantum Semiconductor and Devices Lab., Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Ganesha 10, Bandung 40132, Indonesia
*yudi[at]itb.ac.id
Abstract
We study the structure and optical properties of Ce-doped \(MoS_2\) (\(MoS_2\):Ce) deposited by DC unbalanced magnetron sputtering at room temperature. Each sample was characterized using scanning electron microscopy (SEM) and energy dispersive X-rays (EDX) to analyze the morphology and percentage of atoms. \(MoS_2\):Ce material has been successfully grown, as marked by the SEM-EDX characterization results. The morphology of \(MoS_2\) flake-shaped changed into larger particles after Ce doped. UV-Vis analysis shows a band gap shift in the values of pure \(MoS_2\) and \(MoS_2\) after Ce doping from 1.45 eV to 1.27 eV. Supporting the experimental results, our ab initio calculation shows that the band gap energy of cerium-doped \(MoS_2\) decreases resulting from the cerium contribution of density of states. This study is important for optoelectronic device application.
Keywords: \(MoS_2\), DC unbalanced magnteron sputtering,Structure and optical properties
