Thesis Organic Solar Cell

It is agreed generally that the increasing use of hydrocarbon-based fossil fuels, which represent the main part of the world energy consumptions [1, 2], is responsible for greenhouse gas emissions and the increasing ecosystem and climate instabilities [5–7] that result in the number of natural catastrophes occurring repeatedly in different areas of the world.

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Together with the prospect of low production cost and the ease of scalability, we believe that the presented nanostructures in this thesis will have the potential to increase the efficiency of the solar cells and hold prospect to be beneficial in various optical and optoelectronic devices.

Investigate the effects of localized surface plasmon structures on organic thin-film solar cells in order to increase their power conversion efficiencies.

A highly concentrated polyethyleneglycol-capped gold nanoparticles suspension from ethanol is drop casted on corrugated silicon-based organic polymer stamps for arranging the nanoparticles.

Surface-ordered gold nanoparticle arrangements are hereafter integrated at the bottom lectrode of organic solar cells.

Metallic nanostructures are used to enhance the light absorption within the semiconductor film in organic solar cells.

A new lithography-free method for nanostructure formation from conjugated polymer is presented in this work.This is followed by the description of baseline organic solar cell (OSC) structures and materials.Then, some of the existing modelling approaches that have implemented either a one- or a two-dimensional drift-diffusion model to examine OSC structures are reviewed, and their reproducibility is examined.These include energy market instabilities, technical or physical failures/threats of energy supply that comprise natural disasters, and different security sabotages that arise mostly due to strong global dependence on fossil fuel resources, which are also concentrated in few countries such as Russia, Iran, and Qatar [3].This makes our world fossil fuel reserves unable to follow with the global energy demand, which is rising continually as a result of human population growth and development.The part of the remaining balance is largely derived from other energy resources, such as nuclear, biomass, rivers, geothermal, and wind [2].Furthermore, due to the strong reliance on nonrenewable fossil fuels, the world energy supply has been experiencing many problems.Our study reveals the light harvesting ability of template-assisted nanoparticle assemblies in organic solar cells.Although the integration of light-trapping features and exploitation of metal nanostructure plasmonic effects are promising approaches for enhancing the power conversion efficiency of organic solar cells, one has to also consider nanostructureinduced electrical effects on the device performance.The evidence of the limited global impact of PV is marked by the increasing market share of fossil fuels in the generation of electricity [1].Notably, about 65–70% of global electricity consumption is derived mainly from exhaustible fossil fuels such as petroleum, coal, and natural gas [1, 2].

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