Dye Sensitized Solar Cells

Dye Sensitized Solar Cells

Dye Sensitized Solar Cells

            Solar energy harvesting is the conversion of electromagnetic radiation from the sun into electricity. Solar cells convert sunlight into electric current through photovoltaic effect. Silicon solar cells are manufactured from doped silicon semiconductor. Exposure of the semiconductor to sunlight causes the movement of electrons and holes which sets up an electric current (Lee, Lu, and Tseng 2). An interconnection of several solar cells forms a solar module.   Dye sensitized solar cells are made from natural dyes such as mulberry. The photo-chemicals contained in these dyes are responsible for current generation under the effect of sunlight.

Silicon solar cells are more efficient and expensive than dye sensitized cells. This is because manufacture of silicon cells is more complex and energy consuming. A lot of current is needed to melt silicon into ingots for the manufacture of mono-crystalline cells and formation of silicon wafers in poly-crystalline cells. Dye sensitized cells belong to the thin film family of solar cells. Natural dyes such as blueberry, mulberry, and jaboticaba’s are used to sensitize titanium oxide electrodes (Patrocínio, Mizoguchi and Paterno 2343).

Solar energy can provide a green energy solution which would reduce overdependence on fossil fuels. The use of fossil fuels in energy generation causes the emission of toxic greenhouse gases such as carbon dioxide which causes global warming and air pollution.  Silicon solar can solve the challenge of large scale power generation without harming the environment through power generation by solar farms. Conventional power generation through thermal and hydro generators causes noise, water, and air pollution.  Dye sensitized cells can be used for a range of applications due to their flexibility and lightness. The cells can be used for mobile applications such as camping or aviation and space exploration applications due to their light weight. Dye solar cells can also be incorporated into clothing to charge mobile devices.

Solar energy provides a viable option from conventional energy sources with a wide range of application from domestic power generation to commercial applications. The technology is also pollution free which sets it above all the other methods of energy generation.

 

References

Lee, Ching-Ting , Lu, Kuan-Fu, and Tseng Chun-Yen. “Carrier drift velocity balance mechanism in Si-based       thin film solar cells using graded microcrystalline SiGe absorption layer” Solar Energy 114 (2015) 1–7

Patrocínio, A.O.T. , Mizoguchi, S.K. , Paterno, L.G., Garcia, C.G., and Murakami, Iha. “Efficient and low          cost devices for solar energy conversion: Efficiency and stability of some natural-dye-sensitized          solar cells Synthetic Metals” Synthetic Metals 159 (2009) 2342–2344,

 

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