POLYCRIYSTALLINE SILICON
SOLAR CELLS
AHMET KARA – MUHAMMET MUSA SÜLÜ
CONTENTS
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WHAT IS SOLAR CELLS
KIND OF SOLAR CELLS
POLYCRISTALLINE SILIKON SOLAR CELLS
ADVANTAGES
DISADVANTAGES
WHAT IS THE SOLAR CELLS ?
Solar cells (photovoltaic battery), the electrical energy into light
energy from the sun devices. Solar cells are semiconductor materials.
Surfaces, square, rectangular, circular areas are generally formatted
batteries 1 m² and thickness is 0.2 to 0.4 mm.
The system works on the basis of photovoltaic solar cells. Light
falling on the batteries voltage creates end. The electricity generated by
the battery, accumulator prepared or directed by the control system and
the direct use of energy will be added or left out there. The control unit
is the brain of the solar cell system. Electricity directly for use at night
or in overcast conditions leaves the control unit.
To increase the power output of the solar cell is a large number
of solar cells in parallel or series connected. Is mounted on a flat
surface, these batteries are connected. This structure is called Solar
Module or PV module.
Means of photovoltaic solar cells convert light energy to
electrical energy. Solar cells operate as a semiconductor diode.
Cells in the upper layers of the solar cell cracks, breaks,
and anti-glare coating and safeguards to prevent energy loss
occurs. Under these layers is located in the N-type and P-type
semiconductor materials. N and P type semiconductor material
substances melt dopings on the desired result of the controlled
substances are formed.
Polycrystalline silicon solar cells are mostly used as a
semiconductor material.
• Construction and operation of solar cells is shown
schematically in the adjacent figure.
1) Sunlight falls on the solar cell and is absorbed by the
photovoltaic cells. P-type semiconductor material and solar
cell at very electrons electrons located in the N-type
semiconductor material.
2) Sunlight breaks the P-type semiconductor material
electrons.
3) Energy won the right flow of electrons N-type
semiconductor material.
4) The one-way flow of electrons constant direct current (DC)
creates. Electrons flowing through the circuits for charging
batteries and P-type semiconductor material used in different
fields or go back.
KIND OF SOLAR CELLS
• Amorphous Silicon Solar Cells
• Copper Indium Gallium Selenide Solar Cells
• Crystalline Silicon Solar Cells
• Polycrystalline Silicon Solar Cells
Amorphous Silicon Solar cell
Copper Indium Gallium Selenide Solar Cells
POLYCRYSTALLINE SILICON
SOLAR CELL
The first solar panels based on polycrystalline silicon,
which also is known as polysilicon (p-Si) and multicrystalline silicon (mc-Si), were introduced to the market in
1981. Unlike monocrystalline-based solar panels,
polycrystalline solar panels do not require the Czochralski
process. Raw silicon is melted and poured into a square
mold, which is cooled and cut into perfectly square wafers.
ADVANTAGES
• The process used to make polycrystalline silicon is
simpler and cost less. This reduces the amount of waste
silicon.
• Polycrystalline solar panels tend to have slightly lower
heat tolerance and therefore perform slightly worse than
monocrystalline solar panels in high temperatures. Heat
can affect the performance of solar panels and shorten
their lifespans. However, this effect is minor, and most
homeowners do not need to take it into account.
DISADVANTAGES
• The efficiency of polycrystalline-based solar panels is
typically 13-16%. Because of lower silicon purity,
polycrystalline solar panels are not quite as efficient as
monocrystalline solar panels.
• You need to cover a larger surface to output the same
electrical power as you would with a solar panel made of
monocrystalline silicon.
• Monocrystalline and thin-film solar panels tend to be
more aesthetically pleasing since they have a more
uniform look compared to the speckled blue color of
polycrystalline silicon.
THAKS FOR LISTENING