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دراسة وتحضير خلية شمسية صبغية ذات تركيب صلب باستخدام صبغة نوع D146 ثنائي اوكسيد التيتانيوم كانود وانابيب الكاربون النانوية متعدد الجدار ككاثود == Study and Preparation of Solid State Dye Sensitized Solar Cell using D149 as a dye ,TiO2 Nanoparticles as a Photo anode and MWCNTs as a Counter Electrode

Author name: ايات عبد علي كطان
Supervisor name: سامر مهدي عبد المحسن
General topic: Physics
Specific topic: Solar Energy Physics
Degree: Master
University: University of Thi-Qar - College Of Science - Physics Department
Language: English
University location: Dhi Qar
First pages:
Abstract: The dye sensitized solar cell (DSSC) is one of the photochemical electric cells, which consists of the photo electrode, dye, electrolyte, and the counter electrode. The advantage of DSSC is the low cost of the solar energy conversion into electricity because of inexpensive materials and the relative ease of the fabrication processes. In this work, titanium dioxide (TiO2) films as a photo electrode were prepared from anatas titanium Oxid (TiO2) nanoparticles and deposited by doctor blade method on fluorine doped tin oxide (FTO)coated glass substrates. After the process of deposition that including the prepared samples in the oven, the temperature raises from room temperature (R.T) to set up to around 400°C. Half an hour later, the temperature started to decrease to reach theroom temperature (R.T) . Multi - walled carbon nanotubes (MWCNT)used as a counter electrode instead of platinum(Pt),where prepared by spray pyrolysis technique (SPT) at 300°C,10 sec as spraying time ,and 60 sec stopped time. In the next step, Preparing the dye solution at room temperature then placed TiO2 electrode in the dye solution for 24 hours in the dark .The last step is collecting two electrodes one over the other leads to build a solar cell. Then a mixture electrolyte about(0.6 M 1 - methyl - 3 propoylimidazolium iodide (PMII) + 0.1 M LiI )is dipped onto the surfaces of both (FTO glass/TiO2NP/D149/PMII and MWCNTs/FTO)glasses .The thickness about (400nm) and the films are prepared under various deposition conditions in order to understand the effect of the temperature on the cell properties and to specify the optimum condition. X - ray diffraction (XRD), scanning electron microscope (SEM) are used for the structural analysis.Raman scattering spectrum used to determine the type of material CNTs used for DSSCs fabrication , Fourier transform infrared spectroscopy (FTIR) used for description as an analysis for system chemical structure of the atoms. UV and visible spectra have been recorded as a function of wavelength in the range (200 - 1000 nm) in order to study the optical properties such as reflectance, energy gap of allowed and forbidden direct transitions, extinction coefficient, refractive index, and dielectric constant in real and imaginary parts. It has been found that all the investigated parameters are affected by the sensitizer dye in the visible region of the spectrum .Finally I - V characteristic curves of the fabricated cell were measured and studied, this cell shows highest photovoltaic performances to date as Solid state dye sensitive solar cells