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SHARDA UNIVERSITY PRESENTATION ON:- Solar Cell PRESENTED BY- Abhiraj Bohra B.Tech (ECE-A) 11SETECE019

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.

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Page 1: Solar Cells

SHARDA UNIVERSITYPRESENTATION

ON:-

Solar Cell

PRESENTED BY-

Abhiraj Bohra B.Tech (ECE-A)

11SETECE019

Page 2: Solar Cells

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.

Page 3: Solar Cells

Solar cell

Page 4: Solar Cells

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

Page 5: Solar Cells

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

Page 6: Solar Cells

n-type semiconductor

p-type semiconductor

+ + + + + + + + + + + + + + + - - - - - - - - - - - - - - - - - -

Operation of a solar cells

Depletion Zone

Page 7: Solar Cells

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.

Page 8: Solar Cells

Solar cell - converts light energy to electricity

Light energy

Electrical energy (carried through wires)

Solar Cells are Converters of Energy…

Page 9: Solar Cells

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

Page 10: Solar Cells