Flexible light weight solar cell laminates:




Dr. Gert Jan Jongerden
Helianthos bv


                     company confid...
Helianthos – light weight flexible solar laminates

 Our Star: the SUN

 Thin Film Solar Cells


 Light weight thin fil...
Our star: The SUN




• Solar irradiation



 - On the earth surface ~ 1000 W/m2

 - Irradiation 800 – 2500 kWh/m2.yr

 - ...
SOLAR ENERGY
                            (direct conversion)


   Solar Thermal            Photovoltaic (PV)            Co...
Thin film solar cells




                        protective layer

                        TCO - transparent
            ...
Thin film PV – a Darwinian sea with developing species

                                 Thin Film Silicon a-             ...
Thin film PV – a Darwinian sea with developing species

                                 Thin Film Silicon a-             ...
Helianthos solar cells foil




                              8
Highly attractive for applications and markets requiring
light weight and flexibility


 Industrial roofs, BIPV
  (buildi...
Objective: cost competitive solar electricity using
integration in building materials and easy installation
  Module effic...
Nuon Helianthos – SMU located in Arnhem




Helianthos bv
Westervoortsedijk 71k
6827 AV Arnhem, The Netherlands
+31 26 365...
12
Flexible Helianthos laminate:




                                13
Flexible Helianthos laminate: >99% packaging



~200 µm                         Transparent encapsulation




            ...
15
16
TCO, textured SnO2 layer partially covered with
  thin film amorphous silicon solar cell layers




                      ...
18
19
20
21
22
Outdoor monitoring




                     23
Very stable performance
   Testing according to IEC 61646
   Example: Damp heat test < 5% in 1000 hours 85 C, 85% RH
  ...
Increasing efficiency: Tandem

                                         top cell (a-Si:H): 0.2 – 0.3 µm
                 ...
Efficiency potential- modeling >15% cell eff.




                                                26
Value chain Helianthos PV-laminate




Helianthos        Helianthos             distribution   Building Integrated
PV-lami...
Market development favorable for
      cost efficient rooftop and BIPV products




Source: EPIA , EUPD, Accelios




    ...
Helianthos self-adhesive flexible solar cell foil
for integration on:
Bituminous roofing   PVC/ TPO/ EPDM roofing         ...
Helianthos’ next milestone is a production factory




• Next steps:
    • achieve milestones
    • attract investment par...
Summary


 Light Weight flexible thin film solar laminates
  • Combining energy & building functions for competitive kWh ...
Endless energy from solar foil




                                 32
33
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The Solaf Future II - Gert-Jan Jongerden

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The Solaf Future II - Gert-Jan Jongerden

  1. 1. Flexible light weight solar cell laminates: Dr. Gert Jan Jongerden Helianthos bv company confidential
  2. 2. Helianthos – light weight flexible solar laminates  Our Star: the SUN  Thin Film Solar Cells  Light weight thin film solar laminates  Helianthos • Product & Technology • Application and Market • Next steps  Outlook and Conclusions Helianthos solar cells foil 2
  3. 3. Our star: The SUN • Solar irradiation - On the earth surface ~ 1000 W/m2 - Irradiation 800 – 2500 kWh/m2.yr - Capacity factor ~8000 (= yearly irradiation/annual primary energy consumption) - Even for medium eff. solar cells (9%) in Netherlands : 3500 kWh per year with < 50 m2 solar cells sufficient for an average household 3
  4. 4. SOLAR ENERGY (direct conversion) Solar Thermal Photovoltaic (PV) Concentrated Solar Power = heat from sunlight direct conversion of (CSP) (solar collector) light into electricity … in sunny deserts Thin film PV solar modules wafer based cells Future technologies (glass panels & Flat plate & concentrator nanolayers / ‘solar paint’ flexible laminates 4
  5. 5. Thin film solar cells protective layer TCO - transparent front contact electron active layer hole back contact substrate 5
  6. 6. Thin film PV – a Darwinian sea with developing species Thin Film Silicon a- CdTe CIGS DSC & Organic PV Si/(µc-Si) Eff. large area a-Si single 9 – 12% 10 – 13% 3 – 6% panels (1 m2) 5- 8% Tandem* 8 – 12 % Eff. potential 12% 14% 16% n.a. Record cells a-Si 10 % 16.5% 20.1% 12.1% tandem 13.4 % (0.25 - 1 cm2) triple 15% + robust, abundant low costs efficiency low cost process materials, costs (?) ? Efficiency Cadmium Moisture Efficiency, Te availability sensitivity stability/durability In availability Substrates of glass glass/glass glass/glass glass/glass power modules flexible flexible flexible in dev. TF Production ~500 1150 ~200 n.a. 2009 (MW) 2009: large area eff. of 9% achieved in production glass panels pilot record modules ~0.1 m2 up to 11% eff. 6
  7. 7. Thin film PV – a Darwinian sea with developing species Thin Film Silicon a- CdTe CIGS DSC & Organic PV Si/(µc-Si) Eff. large area a-Si single 9 – 12% 10 – 13% 3 – 6% panels (1 m2) 5- 8% Tandem* 8 – 12 % Eff. potential 12% 14% 16% n.a. Record cells a-Si 10 % 16.5% 20.1% 12.1% tandem 13.4 % (0.25 - 1 cm2) + triple 15% robust, abundant low costs Thin film Silicon PVlow cost process efficiency will materials, costs be a typical survivor (?) ? Efficiency Cadmium Moisture Efficiency, •Competitive kWh Te availability sensitivity costs stability/durability In availability •Abundant materials Substrates of glass glass/glass glass/glass glass/glass power modules flexible •Development potential in dev. flexible flexible TF Production ~500 1150 ~200 n.a. 2009 (MW) 2009: large area eff. of 9% achieved in production glass panels pilot record modules ~0.1 m2 up to 11% eff. 7
  8. 8. Helianthos solar cells foil 8
  9. 9. Highly attractive for applications and markets requiring light weight and flexibility  Industrial roofs, BIPV (building integrated PV)  Mobile/ automotive  Functional textiles  Military/ outdoor  Consumer applications  Rural / remote habitation 9
  10. 10. Objective: cost competitive solar electricity using integration in building materials and easy installation Module efficiency % kWh costs ↓ Today main solar tech c-Si wafer System Costs (€/Wp) ↓ Helianthos Module costs ↓ + System integration costs ↓ Cost * € /kWh Solar cell laminate products:  Roll-to-Roll production technology  Flexible & lightweight modules  Thin film silicon technology: abundant, robust  Pilot: a-Si single cells PV laminate  Future production: a-Si/µc-Si tandem cells PV laminate Saving materials, continuous processes, simple installation & combining functions 10
  11. 11. Nuon Helianthos – SMU located in Arnhem Helianthos bv Westervoortsedijk 71k 6827 AV Arnhem, The Netherlands +31 26 3651100 helianthos@nuon.com 11
  12. 12. 12
  13. 13. Flexible Helianthos laminate: 13
  14. 14. Flexible Helianthos laminate: >99% packaging ~200 µm Transparent encapsulation Transparent Conductor ~<2 µm Active layer (a-Si/µc-Si) Metallic back contact ~200 µm Carrier & encapsulation +roofing materials Energy pay back time: 0.8 – 1.3 yr 14
  15. 15. 15
  16. 16. 16
  17. 17. TCO, textured SnO2 layer partially covered with thin film amorphous silicon solar cell layers 17
  18. 18. 18
  19. 19. 19
  20. 20. 20
  21. 21. 21
  22. 22. 22
  23. 23. Outdoor monitoring 23
  24. 24. Very stable performance  Testing according to IEC 61646  Example: Damp heat test < 5% in 1000 hours 85 C, 85% RH  Excellent behavior ~8% degradation in 8000 hours  Our interest : unravelling operating mechanisms Duration IEC test 24
  25. 25. Increasing efficiency: Tandem  top cell (a-Si:H): 0.2 – 0.3 µm  bottom cell (µc-Si:H): 1- 3 µm  Perspective large area efficiency 8 –12% Stabilised Voc Jsc FF Eff(%) (1000 hr) (V) (mA/cm2) stab. LM32331 1.35 10.2 0.653 9.1 LM32331 1.37 10.3 0.647 9.1 Cell area 5 cm2 25
  26. 26. Efficiency potential- modeling >15% cell eff. 26
  27. 27. Value chain Helianthos PV-laminate Helianthos Helianthos distribution Building Integrated PV-laminate installable products installation PV Helianthos light weight solar cell laminates address the large (separate) market of BIPV & industrial roofing 27
  28. 28. Market development favorable for cost efficient rooftop and BIPV products Source: EPIA , EUPD, Accelios 28
  29. 29. Helianthos self-adhesive flexible solar cell foil for integration on: Bituminous roofing PVC/ TPO/ EPDM roofing Metal roofing panels  Various self adhesives (stick and peel), tuned and certified to be used in combination with different roofing materials and roofing materials manufacturers • with or without use of a roofing primer • on existing roofs with a good surface quality and > 25 years lifetime expectancy or newly placed roofs • As a BIPV or BAPV system 29
  30. 30. Helianthos’ next milestone is a production factory • Next steps: • achieve milestones • attract investment partner • gradual expansion to (tandem) volume production 30
  31. 31. Summary  Light Weight flexible thin film solar laminates • Combining energy & building functions for competitive kWh costs • Thin film silicon: a species with survival ‘genes’  Helianthos : • Proprietary roll-to-roll thin film silicon product & technology • Product fit for volume market: BIPV/large roofs & integration • Growth opportunity for value creation Helianthos solar cells foil • Preparing next step: inviting investment partner(s) 31
  32. 32. Endless energy from solar foil 32
  33. 33. 33
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