Solar panels
can convert sunlight energy into electrical energy and can be a source of
enormous power. It is being used widely around the world as the new source of
energy. It is possible that one day the world could be completely reliant on
solar energy. So, we must need to know how solar panel converts solar energy.How does solar panel work?
Solar
panels are made up of many small solar cells. The solar cells are usually made
from a common semiconductor named silicon. Crystalline silicon is sandwiched
between conductive layers. Every silicon atoms are connected to each other by
four strong bonds which keep the electrons in place so no current can flow.
A
silicon solar cell uses two different layers of silicon. In the cells, there is
n-type silicon which has extra electrons and p-type electron which has extra
spaces that is called holes. The two layers meet in the P/N junction where
electrons can travel around. These moving electrons leave positive charge in
one side and create negative charge in the other side.
Tiny
particles named photon comes from sunlight and hits the silicon cell with
enough energy. It displaces electrons from their bond, leaving holes. The
positive charged holes and negative charged electrons can now freely move
around. They have only one way to go.A
silicon solar cell uses two different layers of silicon. In the cells, there is
n-type silicon which has extra electrons and p-type electron which has extra
spaces that is called holes. The two layers meet in the P/N junction where
electrons can travel around. These moving electrons leave positive charge in
one side and create negative charge in the other side.
Tiny
particles named photon comes from sunlight and hits the silicon cell with
enough energy. It displaces electrons from their bond, leaving holes. The
positive charged holes and negative charged electrons can now freely move
around. They have only one way to go.
The
electron is sequenced to the negative side while the hole is drawn to the
positive. The running electrons are collected by thin metal fingers at the top
of the cell. From there they flow through an external circuit, like powering a
light bulb, before returning.
Although
each cell only puts out half a volt but solar panels contain many cells that
can produce a good energy.
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