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Preparation of Mesoporous Titania Film Using Block Copolymer Template in Application of Dye-sensitized Solar Cell

Babamahdi, Zahra | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47884 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Mohammadi, Mohammad Reza
  7. Abstract:
  8. The Mesoporous Titanium Dioxide film using Sol-Gel method and Evaporation-Induced Self-Assembly technique (EISA) was prepared. In this study, in order to employ the best coatings in anode electrode of dye-sensitized solar cell, different conditions of making this film, the effective parameters in final structure, and various methods of coating were analyzed. After optimizing the conditions of film creating, images of field emission scanning electron microscope (FESEM) proved the formation of a layer of mesoporous structure which thickness after three times of coating is about 1.5 micrometers. In order to increase the energy conversion efficiency of solar cells, a new formulation for preparing the titanium dioxide was used and the field emission scanning electron microscope images of coatings made of this paste, showed the creation of micron spheres with the mesoporous structures. For determining the non-organic blocks in sol, DLS test was used. The average size of these particles using test results was 33.3 nm. The Titania crystal phases and their proportions as well as the size the achieved crystallite from the XRD results were analyzed by changing the preparation conditions of coating and the results showed this size in the range of 20-14 nm for rutile and anatase phases is fluctuating between 16-13 nm. The specific surface area level and pores size were determined using the results of BET and BJH were between 50.5-94.6 square meters per gram and 9.2-11.5 nm respectively
  9. Keywords:
  10. Dye Sensitized Solar Cells ; Sol-Gel Method ; Mesoporous Materials ; Titanium Dioxide ; Evaporation-induced Self-assembly (EISA)

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