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Solar Cells
 

Solar Cells

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A solar cell (also called photovoltaic cell) is a  electrical device that converts the energy of light directly into electricity by the photovoltaic effect.

A solar cell (also called photovoltaic cell) is a  electrical device that converts the energy of light directly into electricity by the photovoltaic effect.

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    Solar Cells Solar Cells Presentation Transcript

    • SHARDA UNIVERSITY PRESENTATION ON:- Solar Cell PRESENTED BY- Abhiraj Bohra B.Tech (ECE-A) 11SETECE019
    • What is a solar cell ? A solar cell (also called photovoltaic cell) is a electrical device that converts the energy of light directly into electricity by the photovoltaic effect.
    • Solar cell
    • Groups of solar cells can be packaged into modules, panels and arrays to provide useful output voltages and currents to provide a specific power output
    • Basic structure of a SOLAR CELL A = Glass cover B = Anti reflective coating C = Contact grid D = N-type Silicon E = P-type silicon F = Back contact
    • n-type semiconductor p-type semiconductor + + + + + + + + + + + + + + + - - - - - - - - - - - - - - - - - - Operation of a solar cells Depletion Zone
    • When light hits the cell When light, in the form of photons, hits our solar cell, its energy frees electron-hole pairs. Each photon with enough energy will normally free exactly one electron, and result in a free hole as well. If this happens close enough to the electric field, the field will send the electron to the N side and the hole to the P side. This causes further disruption of electrical neutrality, and if we provide an external current path, electrons will flow through the path to their original side (the P side) to unite with holes. The electron flow provides the current, and the cell's electric field causes a voltage.
    • Solar cell - converts light energy to electricity Light energy Electrical energy (carried through wires) Solar Cells are Converters of Energy…
    • Solar cells can only absorb specific wavelengths of light. A certain wavelength of lights gets absorbed depends on its energy Light with energy greater than the band gap energy of Si is absorbed