solar paint that generates electricity
DESCRIPTION
solar paint that generates electricitysolar paint that generates electricityTRANSCRIPT
Power Generating Solar Paint
Presented byABHISHEK.M.HAVANUR 202EE11002
KHKabbur institute of engineering Dharwad
Topics to be covered Introduction Conventional Solar Cell Quantum dots Solar paint Graph Photo electrochemical
performance Comparison Applications Challenges Conclusion
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Introduction Urgent need for new ways of generating electricity
Development of new technology
Low cost solar energy
Paint coatings or Flexible plastic sheets (PET)
Applied to building, vehicle and appliances
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Conventional solar cell
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Quantum dots Semiconductor whose excitons are confined in all three spatial
dimensions
Typically have dimensions measured in nanometers
Boosts the energy conversion efficiency
Types of quantum dot solar cells
a. ETA(Extremely thin absorber) cells
b. Sensitizers5
Continued….
a) Can be linked together as molecules
b) Lattices
c) Attached to a polymer backbone
d) Incorporated into a polymer thin film 6
How to prepare solar paint
Consists of Cds, CdSe and TiO2 particles
There are two methods
a. Physical mixing of TiO2 and CdS in a mixed solvent
b. Pseudo-SILAR(Sequential Ionic Layer Adsorption and Reaction) method
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A) Tert-butanol and water as solvent
B) CdS powder and TiO2 powder are slowly mixed into the solvent
C,D) CdS deposited on TiO2 after
pseudo-SILAR process
E,F) Annealed films of solar paint
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Solar paint
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Graph
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Photo electrochemical performance
electrode ratio method Jsc (mA/cm2) Voc (mV) η (%)
CdS/TiO2 1.5:1.0 Mix 2.26 600 0.71
CdS/ZnO 2.25:1.0 Mix 3.01 675 0.57
CdS/ZnO/TiO2 2.0:1.0:0.2 Mix 3.63 685 0.89
CdS/TiO2 1.0:3.5 SILAR 2.33 615 0.87
CdSe/TiO2 1.0:5.0 SILAR 2.12 608 0.83
CdS–TiO2/
CdSe–TiO2
1.0:1.5 SILAR, mix 3.1 585 1.08
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Comparison
Conventional solar cell Not flexible and heavy
Can not respond at low light levels
Provides power comparatively at higher cost
Cell made from solar paint Flexible and very thin
Can even respond at low light levels
Provides power at low cost
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Challenges
Improving the light to energy conversion rate
Applying paint directly on to the roofs of the building
Work still needs to be done to improve the conducting material
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Future Applications
Sweater coated with paint could power a cellphone or other wireless devices
A hydrogen powered car coated with paint could convert energy into electricity to continually recharge the battery
Industries can generate their own power just by coating paint on the building surface
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Conclusion
The paint can be made cheaply and in large quantities. If the efficiency is improved somewhat it will make a real difference in
meeting energy needs in future
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