Single wall carbon nanotubes possess a wide range of direct bandgaps matching the solar spectrum, strong photoabsorption, from infrared to ultraviolet, and high carrier mobility and reduced carrier transport scattering, which make themselves ideal photovoltaic material. . Organic photovoltaic devices (OPVs) are fabricated from thin films of organic semiconductors, such as polymers and small-molecule compounds, and are typically on the order of 100 nm thick. Because polymer based OPVs can be made using a coating process such as spin coating or inkjet printing, they. . Perovskite solar cells can be made not only more robust but also more efficient, scalable and cheaper to manufacture by replacing the indium tin oxide (ITO) in the device, according to research led by the University of Surrey. In this chapter, first, we reviewed the principle of solar cells and the different roles of CNTs in these devices.
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