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Stability Enhancing of Perovskite Solar Cell by Replacing TiO2 Mesoporous Layer with Oxide Perovskite Structures

Saremi, Fatemeh | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52965 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Mohammadi, Mohammad Reza; Seyed Reihani, Morteza
  7. Abstract:
  8. The purpose of this study is fabrication and characterization of a mesoporous Perovskite solar cell using Barium Titanate as the mesoporous electron transfer layer. In this study, TiO2 nanoparticles and BaTiO3 oxide perovskites were prepared by sol-gel synthesis method and their pastes were applied to the conductive substrate by spin coating method and applied to electron transfer layer in perovskite solar cells. Then Perovskite solar cells were fabricated with different structures from the electron transfer layer.The results of X-ray diffraction analysis showed that pure Barium Titanate and Titanium dioxide nanoparticles were successfully synthesized with tetragonal and cubic crystal lattice, respectively. Field emission scanning electron microscopy and BET analysis showed uniform morphology with good distribution of grains and cavities, appropriate grain size, porosity and optimum specific surface area in each barium titanate electron transfer layer compared to pure titanate layer.In the results of photovoltaic and electrochemical impedance spectroscopy were observed that Perovskite solar cell with this structure (FTO / Block TiO2 / meso TiO2 / meso BaTiO3 / Perovskite / Spiro / Au) had 10.71% efficiency and more stability than other perovskite cell structures
  9. Keywords:
  10. Barium Titanat ; Stability ; Perovskite-Based Solar Cell ; Electron Transporting Layer ; Mesoporous Titanium Dioxide

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