Tuning the Optical Properties of Quantum Dots to Increase the Efficiency of Solar Cells

Quantum Dot Solar Cells are a promising class of third-generation solar cells that are being developed to deliver pathbreaking efficiencies as a result of the unique optical properties of quantum dots, and this paper aims to increase their currently dismaying efficiency

Arnav Ghatiwala; Pioneer Academics

2020

Scholarcy highlights

  • With energy needs growing worldwide and a decrease in the amount of fossil fuel, there has been a massive increase in the importance of alternative and renewable energy sources, including solar, wind, tidal, geothermal, etc
  • We have modelled the energy needed by a photon in Equation 4, which is essentially the first exciton energy: This equation is representative of how altering a, the radius of the quantum dot, can affect the exact energy needed to excite an electron, i.e. the first exciton energy or the band gap energy of the quantum dot
  • We looked for materials which had been extensively researched upon and tested as Quantum dots in solar cells while showing effectiveness in multiple aspects relating to PVs, such as cadmium selenide and cadmium telluride
  • Quantum Dot Solar Cells have been attracting much attention because QDs can be tuned to absorb a wide range of wavelengths of light
  • By using colloidal solutions of both QDs and depositing them using the LBL process, we were able to create a tandem structure for QDs in QDSCs where CdTe QDs were placed above PbS QDs due to having higher band gaps
  • While the final model has certain limitations, it is a basic yet effective structure that can be employed in QDSCs while considering the other components to deliver a high power conversion efficiency

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