Study On Preparation And Mutual Sensitization Of Positive Electrode Of Dye-Sensitized Nanocrystalline Solar Cells

In recent years, Dye-Sensitized nanocrystalline Solar Cells have attracted attention because of large-area fabrication, potentially low cost and ease of designing materillals based on the molecular level. However, it is the rough researches on improving the properties of the electrode, dyes, electrolytes, and photon-to-current conversion efficiency.The thesis focuses on the preparation and mutual dyes sensitization of positive electrode of dye-sensitized nanocrystalline solar cells.Firstly, based on the review of the current researches and development in Dye-Sensitized nanocrystalline Sollar Cells, the anatase nano-porous TiO₂ powder is preparated by Sol-Gel method. After changing the quantity of the suface activated agent, pH numeric and the quantity of the water, we can easily find the proper composition of precursor and more holes and smaller particles on the nano-porous TiO₂ films are generated. At the same time, we can find the proper temperature to form the nano-porous TiO₂ films by roasting nanocrystalline TiO₂ powder under the different temperature.Secondly, the anatase nano-porous TiO₂ films are fabricated by Sol-Gel method. We find the more ideal conditions for nano-porous TiO₂ films semiconductor electrode by scanning analyzer.Finally, based on the review of the current researches and development in Dye-Sensitized Solar Cells, we choose the three kind of organic dyes which are eosine Y, coumarin and Rhodamine B as the mutual sensitization dyes. It is proved that the absorptions are broadened and the light harvesting increases. At last, we find the ideal mutual sensitization dyes.