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Organic solar cells en

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This presentation gives an outlook on how we will be able to generate solar energy in the future at affordable cost and with new, more flexible applications based on organic photovoltaics. With our …

This presentation gives an outlook on how we will be able to generate solar energy in the future at affordable cost and with new, more flexible applications based on organic photovoltaics. With our partners, we develop highly efficient OPV devices which convert sunlight into electricity

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  • 1. OrganicSolar Cells 1
  • 2. How can we provide sufficient, affordable energy fora growing world population? 2
  • 3. Renewable energies:The potential of our sun Global energy demand 2050* Total capacity of the sun 28 TW 120.000 TW 36.000 TW on land 6 TW 10 TW missing Geothermal energy 2 TW Hydro power 4 TW Wind power 6 TW Biomass* Forecast of energy-mix according to potential 3
  • 4. The sun provides almost infinite amountsof energy… Insolation power on earths surface  = ca. 900.000 km2 with solar cells of 8 % efficiency: 18 TW * * Global energy demand 2006:14 TW 0 50 100 150 200 250 300 350 W/m2 Forecast for 2050: 28 TWSource: Matthias Loster, 2006, Wikipedia 4
  • 5. We are flooded withenergy from the sun.Can we put light intobags?Yes, we can!By converting it intoelectricity ! 5
  • 6. Our competence:1.We investigate novel dyesthat lead to high powerconversion efficiencies. 6
  • 7. New NIR dyes harvest more light Normalized EQE / radiant power  ID1216 has a potential power ID504 conversion 10 mA/cm² efficiency of ID1216 up to 12 % 14 mA/cm²  New dyes are optimized for Solar spectrum application in solar cell400 500 600 700 800 devices Wavelength [nm] 7
  • 8. Timeline of record efficiencies of differentthin-film technologies Conversion efficiency (Lab) in % Development similar to inorganic thin- film technologies CdTe CIGS a-Si OPVSource: NREL 2010 et al. 8
  • 9. Our competence:2.With our partners, wedevelop highly efficientOPV devices whichconvert sunlight intoelectricity. 9
  • 10. How does an organic solar cell work? Excited state Electron transport Light Voltage energy Hole Ground transport Current = Number of converted photons state 10
  • 11. Our competence:3.Our devices aremanufactured by simplecoating processes. 11
  • 12. Example Solargate –Transparent, flexibleintegrated modules 12
  • 13. Organic solar cells canbe integrated into roofs,facades, windows andcars. 13
  • 14. Roadmapfor Organic Photovoltaics – OPV Cars, roofs, facades 2020 Local supply in rural areas, industrial applications 2015 Consumer electronics, mobile solutions 2010Source of picture (middle of bottom section): Deutsche Solar 14
  • 15. Organic photovoltaics isa sustainable technologybecause…… the energy payback timeof the installed modules isonly a few weeks.…the raw materials arecheap and almost unlimited.… no heavy metals or rare-earth materials are necessaryfor production. 15
  • 16. Our challenges in the coming years: The lifetime must be increased to 20 years. Robust manufacturing techniques have to be developed. The power conversion efficiency has to be improved to > 10% in modules. 16
  • 17. 17