M.Phil / MS
Permanent URI for this collectionhttps://repository.cuilahore.edu.pk/handle/123456789/60
This collection archives the complete set of theses produced by students of the COMSATS University Islamabad, Lahore Campus.
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Item Investigations on Silicon Dioxide Nanostructures for the Applications of TOPCON Solar Cells(2022) Sidra Abdullah; CIIT/FA20-RPH-012/LHR; Dr. Shahzada Qamar Hussain; LHR TP 7974Silicon has been considered the best material for the fabrication of solar cells due to its non- toxicity, abundance, high and stable cell efficiencies, and industrial technological approaches. In this project, silicon dioxide (SiO2) based nanostructures were synthesized using a solution- based sol-gel technique. Spin coater was used to deposit the thin films of SiO2 on a glass substrate. The surface morphology of SiO2 nanostructures was measured by using a scanning electron microscope (SEM). The structural analysis of SiO2 nanostructures was studied via X- ray diffraction (XRD) analysis. UV-Vis spectrophotometers were used to measure the optical properties of SiO2 thin films. The simulation was used to study the influence of SiO2 and other layers on the TOPCON solar cellsItem The Coated Carbonates on Silicon Carbide Materials as an Electrolyte and it's Electrochemical Characterization(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2022) Muddasir Ammar; CIIT/FA20-RPH-040/LHR; Dr. Shahzada Qamar Hussain; LHR TP 7996In this work we synthesized Silicon Carbide and Coated Carbonate on Silicon Carbide composite as an effective electrolyte material in fuel cell. Fuel cell is considered an efficient device for its clean energy production. To enhance the efficiency of such type of clean energy devices an efficient electrolyte material is required for its proper working. Therefore, in this research work Si- C composite was made by hydrothermal method and Solid-state method. While coated the Sodium Carbonate (Na2CO3) and Potassium Carbonate (K2CO3) on Si-C by dip coating method. To analyze the structural and phase properties of the synthesized samples FTIR has been carried out. Through FTIR spectra various types of stretching and vibrational bonding were studied and find out that there were different kinds of bonding like Si-O-Si, Si-C and C=O present in the prepared samples. UV- Visible spectroscopy was carried out to study the optical bandgap of the prepared samples. Conductivity and electrical bandgap for all composite material was measured by using EIS and the maximum conductivity was found 0.082 Scm-1 at a temperature of 650oC for the sample Si-C (1:1). Furthermore, the three-layer fuel cell was fabricated in which prepared material use as electrolyte and LiNiCuZn as cathode and Anode. The maximum Voc of 0.89 V wi th highest power density of 16.5 (mWCm-2) was recorded by using hydrogen as a fuel.