Preparation of hybrid Molybdenum Disulfide/Single Wall Carbon Nanotubes-n-type Silicon Solar Cells

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

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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