Power from paint

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Power from paint

  1. 1. Power Generating Solar Paint Presented by ABHISHEK.M.HAVANUR 1 KHKabbur institute of engineering Dharwad
  2. 2. Topics to be covered  Introduction  Conventional Solar Cell  Quantum dots  Solar paint  Graph  Photo electrochemical performance  Comparison  Applications  Challenges  Conclusion 2
  3. 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. 4. Conventional solar cell 4
  5. 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. 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. 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. 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. 9. Solar paint 9
  10. 10. Graph 10
  11. 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. 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. 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. 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. 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. 16

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