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Silicon for solar cells

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Information @ a Glance

  • Solar cell is  an electrical device and it converts energy of light directly into electricity.
  • Atom of silicon has 14 electrons and it arranged in three different shells and it has some special chemical properties and especially in its crystalline form.
  • Raw material of silicon for solar cell is silicon.
  • Multi-crystalline Silicon cells size is 125mm X 125mm and the mono-crystalline Silicon cells size is 156mm X 156mm.
  • Two kinds of category have silicon solar cells they are electrical parameter & recombination parameters.
  • It is important know these parameters for estimating the degree of perfection and quality of silicon solar cells.
  • Pure crystalline silicon is a poor conductor of electricity as none of its electrons are free to move about and unlike the electrons in more optimum conductors like copper.
  • It is continuous innovation makes cells more complex and it is impractical to design new cells without simulation.
  • High efficiency and stable performance in solar cell conversion and it also has high quality metal paste for back surface and electrode, ensuring good conductivity, high pulling strength and ease of soldering.
  • Silicon solar cell represent 40% of the world solar cells production and yield efficiencies well higher than 25%.
  • A light absorbing material is needed to Solar cells because it obtained within the cell structure to absorb photons and also generate the electrons.
  • The wafer based silicon solar cells was stagnated at 14% to 15%.
  • Solar cells based on hydrogenated amorphous silicon and the emitter of silicon solar cells has a thickness in the order of only 0.3micro m.
  • Silicon based solar cells reflect approximately 30% of the incident light in the spectral range.
  • The surfaces of crystalline silicon solar cells are usually textured to reduce the surface reflectance which may increase the efficiency considerably.
  • The amorphous silicon solar cells have been used for the fabrication of our solant prototypes.

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