Power from paint
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  • 1. Power Generating Solar Paint Presented by ABHISHEK.M.HAVANUR 1 KHKabbur institute of engineering Dharwad
  • 2. Topics to be covered  Introduction  Conventional Solar Cell  Quantum dots  Solar paint  Graph  Photo electrochemical performance  Comparison  Applications  Challenges  Conclusion 2
  • 3. 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 3
  • 4. Conventional solar cell 4
  • 5. 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. Sensitizers 5
  • 6. Continued…. a) Can be linked together as molecules b) Lattices c) Attached to a polymer backbone d) Incorporated into a polymer thin film 6
  • 7. 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 7
  • 8. 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 8
  • 9. Solar paint 9
  • 10. Graph 10
  • 11. 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 11
  • 12. 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 12
  • 13. 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 13
  • 14. 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 14
  • 15. 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 15
  • 16. 16