2. Contents....
Definition ……………...………..1
History …………………………..2
Types of solar cell…….………….3
Structure of solar cell.……………4
Working and construction of solar
cell………………………………..5
Advantages and disadvantages
…………6
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3. What is solar cell:
A device converting solar radiation into
electricity.
Solar power:
Solar power is the conversion of sunlight
into electricity, either directly using photovoltaics
(PV), or indirectly using concentrated solar power.
Concentrated solar power systems use lenses or
mirrors and tracking systems to focus a large area of
sunlight into a small beam.
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4. History of solar cell
1839: Photovoltaic Effect Is
Discovered. French
scientist Edmond Becquerel
first discovered the
photovoltaic effect in 1839.
This process occurs when
light is absorbed by a
material and creates
electrical voltage. Most
modern solar cells use
silicon crystals to attain this
effect.
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5. Types of solar cell
•Amorphous Silicon solar cell (a-
Si)
•Concentrated PV cell (CVP and
HCVP)
•Crystalline silicon solar cell (c-
Si)
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6. Structure of solar cell
A solar cell is an electronic
device which directly converts
sunlight into electricity. Light
shining on the solar cell produces
both a current and a voltage to
generate electric power. This
process requires firstly, a material
in which the absorption of light
raises an electron to a higher
energy state, and secondly, the
movement of this higher energy
electron from the solar cell into
an external circuit. The electron
then dissipates its energy in the
external circuit and returns to the
solar cell.
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7. Working of solar cell
The main part of a silicon (Si) solar cell generating solarpower is formed
by two differently doped (n- and p-) silicon layers. A physical barrier is
created between them along the p-/n- junction, with electrons and holes
diffusing into regions of lower concentration.
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8. Advantages & disadvantages
Advantages
1…It uses renewable energy
source.
2…It produce electricity which
does not cause pollution.
3…It can be use in remote areas.
4…Reduce consumption of
fossil fuels in the production
of electricity.
5…Reduce production of green
house gases as CO2.
Disadvantages
1…It uses a special grade of
silicon which is expensive.
2…Current produce in the form
on DC.
3…silver is use in the production
which is expensive metal.
4…Interfere with natural flow of
water.
5… Requires maintenance .
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