nanotechnology appications in solar pv cells next generation fuel source for mankind

1. Mr.Shashank.R.Ambedkar.
Mr.Avinash Kokate.
Mr.Umesh.J.Kale.

2. What is nanotechnology
 Nanotechnology is interdisciplinary, involving
physics,chemistry,biology, & engineering disciplines.
 A basic definition: It is the engineering of functional
systems at the molecular scale.
 It is not an atom and reside on surface of atom.
 Best illustartion of nanotechnolgy is they are motes of
matter of 1000 of times smaller than the width of a
human hair.

3. Application of nanoscience
 Biomedicine And Health Care.
 Assistive devices and tissue engineering
 Information Technology.
 Molecular Electronics.
 Nanotube and Nanowires.
 Communication Technology.

4. TYPICAL SOLAR CELL

5. Overview of solar
cells
Solar cells are photovoltaic
device.
It converts light energy
into electrical energy.
Majority of solar cells are
fabricated by
semiconductors like silicon
or GE.

6. WORKING OF
SOLAR CELLS
Solar cells are arranged in large
grouping called arrays.
These arrays consist of large no’s
small individual cells .
Cells converts sunlight
energy(PHOTONS) into electrical
energy
Examples of semiconductor
materials employed in solar cells
include silicon, gallium arsenide,
indium phosphide, and copper

7. • DEMERITS OF SOLAR CELLS
 Less efficient and high manufacturing cost.
 Most times incoming photons or light have
less band gap energy
 Because of less band energy electrons
doesn‟t knock out.
 Extra energy is wasted in heat form.

8. HOW NANO USED IN SOLAR PV CELLS
 Nano particles are so small they reside on
surface of atom.
 Nanostructured thin films(silicon films) are
used in solar cells of 150nm.
 Thin films offers more Absorption of photons.
 electrons holes travel short path to reach
conduction band.

9. Nano boosts cells
performance
 Conventional solar cells converts only bluish light
of sunlight not red light.
 Solar cells coated with thin film of silicon of 1
nanometer are most efficient.
 Thin films boost performance by 60% of UV rays
are absorbed.
 Single wall carbon Nanotubes are most efficeint
than nanoparticles alone.

10. Nanotechnology improve
solar cell
 Nanotechnology use Quantam dots(QD) to
increase efficiency of solar cells.
 Conventionalmaterials in one photon
generates just one electron.
 Quantam Dots have potential to generates
multiple electrons.
 Useof dots increase the electrons to move
from Valance band to conduction band very
easily.

11. schematic of Quantam dots

12. merits of semiconductor
quantam dots
 Semiconductors and material combinations
like Si/Ge or Si/Be Te/Se are considered.
 Advantage Higher lighter Absorption.
Increase the photo current at
higher temperatures.
Improved radiation hardeness
than conventional one.

13. COST REDUCTION BY NANO
 Nanotechnology reduces installation cost.
 Power solar sheets helps to reduces cost of solar
cells
 Cheaper power sheets are made by nanosolar
companies.
 reducing production cost from $3 a watt to 30
cents only.
 Because of nanotechnology solar power is
cheaper than burning coal.

14. APPLICATION OF
NANOTECHNOLOGY USING SOLARCELL
 Inexpensive solar cells using nanoscience would
to help preserve environment.
 Fossils fuels use would decrease and thus
pollution decrease.
 Cheap solar use for lighting,medical devices and
even cooking.
 improve the standard of living for millions,
possibly.
 even billions of people can help to reduce
carbon emissions.

15. conclusion
 Nanotechnology films used in solar cells promise to
increase .
1} SOLAR ENERGY CONSERVATION.
2} REDUCE MANUFACTURING COST.
3} CAPABLE OF SUPPLYING LOW
POWER DEVICES.
4} FUTURE ENERGY SOURCE FOR
MANKIND.
5} PRESERVE THE ENVIRONMENT.
6} HELPS TO DEVELOPING COUNTRIES
TO PROVIDE ELECTRICITY.
7} AT LAST,NANOTECHNOLOGY IS BOON
TO HUMAN SOCIETY.

16. references
 Nayfeh, “Thin film silicon nanoparticle UV
photodetector” IEEE Photonics Technology,
Volume 16, Issue 8, Pages 1927-1929, August
2004.
 Aldous, Scott. “How Solar Cells Work.” How Stuff
Works.
 M.W. Rowell (June 5, 2006). „Organic solar cells
with carbon nanotube network electrodes‟.
 Greg P. Smestad,” The Basic Economics of
Photovoltaics” Optical Society of America 2008.