Dye Sensitised Solar Cell Thesis

Dye Sensitised Solar Cell Thesis-38
Studies have reported several different methods to improve the efficiency of DSSCs, such as the use of panchromatic sensitizers or 3-dimensional metal oxide nanostructures [10–14].This review highlights another huge pool of studies that report improvements in the efficiency of DSSCs, especially those that employ the use of Ti O nanotube array channels and how to overcome the barrier layer that exists at the bottom of these arrays to achieve a high PCE in DSSCs.An early version of a DSSC fabricated by O’Regan and Grätzel used ruthenium-based dye and 10-μm-thick porous Ti O nanoparticle films for the photoelectrode [7].

Studies have reported several different methods to improve the efficiency of DSSCs, such as the use of panchromatic sensitizers or 3-dimensional metal oxide nanostructures [10–14].

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The best power conversion efficiency of 5.38% was obtained on micropaper with a combination of Ti O₂ nanospherical particles and a 1D nanostructure.

Incorporation of double- walled carbon nanotubes (DWCNTs) into a Ti O₂ photo-anode layer has been studied.

The price of fossil fuels continues to rise because of the increasing worldwide energy consumption.

The need for an affordable, sustainable, and carbon-free renewable energy source is greater than ever, as the rapid growth rate of renewable energy consumption suggests [2, 3].

During the sintering at 450–500°C, which crystallizes the mesoporous Ti O nanoparticles, the sheet resistance of ITO increases and affects the energy conversion efficiency of the DSSCs.

However, the sheet resistance of FTO is independent of the temperature up to 500°C, which makes it favorable for applications that utilize the sintering step.However, there are still several weaknesses that require improvement, such as relatively low efficiency, high cost of the ruthenium dyes, conducting glass, and platinum, temperature stability problems, and low scalability.Among the various potential solutions, some of the most widely investigated ones are the development of new sensitizers to cover a broader solar spectrum and the fabrication of new photoanode structures with enhanced light utilization.The electrolyte consists of a redox couple and diffusing reducing/oxidizing agent ions, and the counter electrode is coated with Pt as shown in Figure 1(a).In general, fluorine-doped tin oxide (FTO) glass is used on DSSCs instead of indium tin oxide (ITO) glass because of the better thermal stability at high temperatures [15].Such high energy output, however, has not been achieved due to thermodynamic and technical constraints as well as few other reasons.Conventional commercial solar cells, which use crystalline and polycrystalline silicon, achieve over 20% energy conversion efficiency for residential end users [5].However, there are some problems, such as complicated and difficult fabrication processing and high cost [6].Dye-sensitized solar cells (DSSCs) are one potential alternative to silicon solar cells.DSSCs provide several advantages, such as low price-to-performance ratio, low processing cost, ability to work at wide angles and low intensities of incident light, mechanical robustness, light weight, and aesthetically appealing transparent design.DSSCs have a number of remarkable properties that allow them to be used for several niche applications; they are low in weight and able to display various colors and transparency, and they work effectively in a broad range of wavelengths [8, 9].


Comments Dye Sensitised Solar Cell Thesis

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