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Preparation and Characterization of Nanocrystalline One-dimensional Cadmium Sulfides by Solvothermal Process for Solar Cell Application

Dalvand, Pegah | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41210 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Mohammadi, Mohammad Reza
  7. Abstract:
  8. One-dimensional (1D) cadmium sulfide (CdS), nanostructures have significant potential applications in solar cells, photocatalysts and many electronic devices. There are many experimental approaches to synthesis 1D CdS nanostructures. Among them solvothermal method has many advantage such as controllable and inexpensive method. 1D CdS nanostructures with different properties in morphology, crystal structure, band gap energy and etc can be obtained by controlling solvothermal processing parameters. In the present work the effect of solvothermal processing parameters including reaction temperature (120ºC ,160ºC and 200ºC), process time (12h, 48h and 72h), sulfur source (S powder, Thiourea and Thioglycolic acid), cadmium source (cadmium acetate, cadmium nitrate and cadmium chloride), solvent nature (ethylenediamine, ethanolamine and triethylentetramine), and surfactant (dodecylbenzensulfonic, hydroxypropyl cellulose and polyvinyl alcohol) on physical, chemical and optical properties of 1D CdS materials were studied. The obtained results revealed that some of the above mentioned parameters can alter crystal structure, crystallization behavior, preferential growth direction, morphology and band gap energy of 1D CdS materials. CdS nanowiers with high aspect ratio of 255 and band gap of 2.562 eV were produced in sulfur powder- cadmium acetate- ethylenediamine system at 200ºC and 72 h. Consequently, in the present work 1D CdS nanostructures with one of the highest aspect ratios and band gap energies were produced which manifests their good potential in solar cell application
  9. Keywords:
  10. Solar Cells ; Cadmium Sulfide ; Solvothermal Method ; Nanocrystal ; One Dimentional Nanostructure ; Nanorod ; Sol-Electrophoretic Deposition

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