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Evaluation of Reaction Parameters Dependent Optical Properties and Its Photovoltaics Performances of CdTe QDs

  • Ayyaswamy Arivarasan
  • Sambandam Bharathi
  • V. Vijayaraj
  • Ganapathy Sasikala
  • Ramasamy Jayavel
Article
  • 82 Downloads

Abstract

High quality thiol capped cadmium telluride quantum dots were prepared in aqueous phase by the optimization of reaction parameters and their photovoltaics performances were studied through the fabrication of quantum dots sensitized solar cells. Mercaptosuccinic acid capped cadmium telluride quantum dots were prepared under different rection conditions (at acidic and basic solutions, different precursors ratios, under different reaction temperatures and are various refluxing times) and their optical absorptionand emission properties were studied. Based on these observations, the reaction parameters were optimized and high quality mercaptosuccinic acid capped cadmium telluride quantum dots were prepared at the optimized reaction conditions. Crystalline structure of the prepared cadmium telluride quantum dots was studied by X-ray diffraction analysis, which confirms the cubic zinc blende structure. Size dependent optical properties of mercaptosuccinic acid capped cadmium telluride quantum dots were revealed by UV–Vis absorption and fluorescence emission studies. The formation of cadmium telluride quantum dots with the thiol capping layer over the quantum dots was studied by the X-ray photoelectron spectroscopy and Fourier Transform Infra Red spectroscopy analysis. Cadmium telluride quantum dots sensitized solar cells were fabricated by using polysulfide electrolytes with TiO2 as the photoanode. The photovoltaic performance of cadmium telluride quantum dots sensitized photoelectrodes was studied by the J–V characteristic curves under the illumination of light with 1 Sun intensity. Mercaptosuccinic acid capped cadmium telluride quantum dots prepared at optimized reaction conditions showed an enhanced solar cell efficiency of 0.87% at 3 h of absorption time.

Keywords

Quantum dots Cadmium telluride Reaction parameters Quantum dots sensitized solar cells 

Notes

Acknowledgements

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Ayyaswamy Arivarasan
    • 1
  • Sambandam Bharathi
    • 2
  • V. Vijayaraj
    • 3
  • Ganapathy Sasikala
    • 3
  • Ramasamy Jayavel
    • 4
  1. 1.Department of Physics, International Research CenterKalasalingam UniversityKrishnankoilIndia
  2. 2.Department of Physics and NanotechnologySRM UniversityChennaiIndia
  3. 3.Crystal Growth CentreAnna UniversityChennaiIndia
  4. 4.Centre for Nanoscience and TechnologyAnna UniversityChennaiIndia

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