Author: Shaykha Alzahly
Alzahly, Shaykha, 2017 Preparation of hybrid Molybdenum Disulfide/Single Wall Carbon Nanotubes-n-type Silicon Solar Cells, Flinders University, School of Chemical and Physical Sciences
Terms of Use: This electronic version is (or will be) made publicly available by Flinders University in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. You may use this material for uses permitted under the Copyright Act 1968. If you are the owner of any included third party copyright material and/or you believe that any material has been made available without permission of the copyright owner please contact copyright@flinders.edu.au with the details.
Molybdenum disulfide (MoS2) is one of the most studied and widely applied nanomaterials from the layered transition-metal dichalcogenides semiconductor family (LTMD). MoS2 is a two-dimensional material that has a layered structure such as hexagonal an intermediate layer for sulfur (S) and molybdenum (Mo), respectively. MoS2 has large carrier diffusion length and has a high charge carrier mobility. The nature of band gap of MoS2 changes from indirect to direct with the reduction in the material thickness from multilayer to few layer to monolayer. Combining SWCNTs and MoS2 will provide novel photovoltaic devices. The most common method for the synthesis MoS2 is exfoliation that that used in this experiment. In this report, MoS2 is added to SWCNTs-n-type-Si solar cells. Then the films were examined using Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and Raman spectroscopy. The MoS2 flake’s thickness was from 5-90 nm while the nanosheet’s lateral dimensions size range up to 1 μm2. From Raman spectrum, the MoS2 peaks appeared at ~384 cm-1 and ~408 cm-1 that are assigned to 1 , and A1g vibrations modes, 2 respectively. This insertion of MoS2 improved SWCNTs-n-type-Si solar cells efficiencies by 5%.
Keywords: Single Wall Carbon Nanotubes, Solar cells, CNT-Si-Solar Cells, Molybdenum Disulfide
Subject: Nanotechnology thesis
Thesis type: Masters
Completed: 2017
School: School of Chemical and Physical Sciences
Supervisor: Joe Shapter