Solar Energy, Solar Cell

What is photovoltaic effect?
It is a direct conversion of light into electricity at atomic level.
Certain materials produce small amounts of electrical energy on being exposed to light.
This effect was first observed in 1839 by Edmund Bequerel.
Solar cell
A solar cell is usually made of a semiconductor material like silicon.
Solar cell is constituted of two silicon pieces.
The p type semiconductor and the n type silicon.
How solar cells work?
When the sun light falls on solar cell, the p type semiconductor and the n type semiconductor come in contact with each other.
Free electrons in the n type semiconductor rush to fill in the holes in the p type semiconductor.
This flow creates the requisite electric current in a solar cell.…