Nanotechnology

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INFRARED PLASTIC SOLAR CELL
Presented By
K.Mahesh Babu IIECE
G.Manoj Krishna IIECE

• GMR INSTITUTE OF TECHNOLOGY

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INTRODUCTION

• Solar energy plays a major role in present days.
• It is renewable source of energy.
• This presentation is about the new type of solar
  cell.
• It is 5 times efficient than conventional solar
  cells.

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NANOTECHNOLOGY

• Nanotechnology is about building things atom by
• atom, molecule by molecule.
• Nanotechnology is billionth of a matter.
• It is defined as the study of functional
  structures with dimensions in the range of 1-100
  nanometer.

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Working of solar cell

• These are photovoltaic (PV) cells based on
  crystalline silicon.
• It absorbs visible sunlight and transferred to
  the semiconductor material.
• This energy knocks electrons to flow freely,
  which results current.
• Current is drawn from the metal contacts in PV
  cell.

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FIGURE SHOWING THE WORKING OF SOLAR CELL
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Why Nanotechnology in solar cell

• The conventional solar cells are less efficient.
• Their efficiency is very poor in cloudy days.
• To overcome above problems, A new type of solar
  cell embedded with NANOTECHNOLOGY is developed,
  which is INFRARED PLASTIC SOLAR CELL.

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Division of sunlight
Sun
Visible
Infrared
Earth
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INFRARED PLASTIC SOLAR CELL

• A plastic solar cell can turn the suns power into
  electric energy even on a cloudy day.

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• It uses specially designed nano particles called
  quantum dots.

QUANTUM DOT
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• The quantum dots with a polymer to make the
  plastic that can detect energy in the infrared.

QUANTUM DOT LAYER
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INFRARED PLASTIC SOLAR CELL

• This plastic material can harness the suns
  invisible infrared rays.
• These plastic solar cells can be taken
  everywhere.
• It reduces the need to PLUG IN for power.

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WORKING OF PLASTIC SOLAR CELL

• It requires semiconductor nanorods (7 nm by
  60nm).

• The heart of a solar cell is a 200-nm-thick film.

• It consists of cadmium selenide (CdSe) nanorods
  and blended with P3HT(poly-3hexylthiophene).

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• A layer only 200 nanometers thick is sandwiched
  between electrodes.
• It can produce 0.7V at present

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• Aluminium coating acts as the back electrode .

• When nanorods absorb light they generate an
  electron and an electron hole.
• Electron is collected by alluminium electrode.
• The hole is transferred to the plastic and
  conveyed to the electrode, creating a current.

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IMPROVEMENTS

• Better light collection and concentration
  employed in the solar cells.
• In plastic cells nano rods are closely packed and
  transfer their electrons more directly to the
  electrolyte.
• They also hope to tune the nano rods to absorb
  different colors to span the spectrum of sun
  light.

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APPLICATIONS

• Telecommunication systems

• Radio transceivers on mountain tops, or telephone
  boxes in the country can often be solar powered.

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• Hydrogen powered car

Hydrogen car painted with the film could convert
solar energy into electricity to continually
recharge the cars battery
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• Coating the cell

• Chip coated in the material could power cell
  phone
• A couple of drops if the titanium dioxide
  suspension is then added.
• The slide is then set aside to dry for one
  minute.

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Ocean navigation aids
Ocean navigation aids many lighthouses and most
buoys are now powered by solar cells.
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ADVANTAGES

• These are considered to be 30 more efficient.
• Their efficiency is same even on cloudy days.
• These are very compact and more practical in
  application.
• These cells avoids effects like pollution.
• Fabrication is easy.

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LIMITATIONS

• They are very costly.
• Relatively shorter life span when continuously
  exposed to sunlight.
• It requires higher maintenance and constant
  monitoring.

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CONCLUSION

• Plastic solar cells help in exploiting the
  infrared radiation.
• More effective when compared to conventional
  solar cells.
• They can even work on cloudy days.
• Though at present cost is a major drawback, it
  can be solved in the near future.

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REFERENCES
1.Introduction to NanotechnologyCharles P
Poole,Frank J Owens
2.Nanomaterialssynthesis,properties and
applicationsEdelstein, A.S.cammarata
3.Solar energy-fundamentals, design, modeling,
applications G.N.Tiwari
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QUERIES ???
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Thank you