1, 1 2 1) 2) 3) 4)...3) Meyer Burger, Schorenstrasse 39, CH-3645 Gwatt (Thun), Switzerland. 4) Pasan...
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The Swiss Inno-HJT project: Fully integrated R&D to boost Si-HJT module performance B. Strahm 1, , D. Lachenal 1 , D. Bätzner 1 , W. Frammelsberger 1 , B. Legradic 1 , J. Meixenberger 1 , P. Papet 1 , G. Wahli 1 , M. Despeisse 2 , A. Faes 2 , A. Lachowicz 2 , C. Allebé 2 , P.-J. Alet 2 , M. Bonnet-Eymard 2 , C. Ballif 2 , Y. Yao 3 , C. Rychen 3 , T. Söderström 3 , J. Heiber 3 , S. Leu 3 , J. Hiller 4 & V. Fakhfouri 4 1) Roth & Rau Research SA, Rouges-Terres 61, CH-2068 Hauterive, Switzerland. ) [email protected] 2) CSEM, Rue de la Maladière 71, CH-2000 Neuchâtel, Switzerland. 3) Meyer Burger, Schorenstrasse 39, CH-3645 Gwatt (Thun), Switzerland. 4) Pasan SA, Rue Jaquet-Droz 8, CH-2000 Neuchâtel, Switzerland. Smart Wire Technology TM cell interconnection for Buss bar free cells During the recent year, it has been proven that silicon heterojunction (Si-HJT) solar cells can achieve efficiencies close to 25 % using simple cell structure. However, most of these record cells have been achieved at the R&D scale and only few companies are producing Si-HJT cells and modules on a mass production scale. In light of this observation, Meyer Burger together with the PV-Center of CSEM and the contribution of the Swiss Federal Office of Energy and the State of Neuchâtel have started end 2013 a project to perform fully integrated R&D at the pilot scale with an overall budget of 10 millions CHF over 3 years. The Swiss Inno-HJT project brings together the development from the sawing of thin wafers using diamond wire technology, advanced cell concepts using proved Roth & Rau deposition equipments for Si-HJT cell production and low cost metallization by plating at pilot scale at CSEM. These cells will be then integrated in monofacial and bifacial modules using the SmartWire technology and will be measured and monitored in outdoor conditions to show the benefits in terms of kWh produced by Si-HJT modules compared to commercially available modules. The wafer division of Meyer Burger in Thun will further improve the ingot slicing using diamond wire technology. Wafer thickness will be reduced from the 180 mm standard to bellow 140 mm to increase the number of wafers per ingot. The influence of the sawing process on the solar cell manufacturing and performance will be studied to reduce cost and improve efficiency. New infrastructure with industrial tools has been set-up at Roth & Rau Research in Hauterive. New solar cell structures will be introduced based on the silicon heterojunction technology. These new cell concepts will enable cell efficiencies >23% with reduced cost of production. The PV Center of CSEM will set-up a pilot line for low cost metallization based on copper plating to replace the more expensive silver screen printing. Different process flows will be tested with the goal to achieve line width bellow 30 mm on bifacial cell structure. The introduction of new cell and metallization technologies makes necessary the introduction of adequate metrology equipments and methods. Pasan SA will develop new measurement product in order to set the standards for the measurement of buss bar free bifacial cells having high capacitance. Three generations of modules will be produced based on the 3 generations of cells. Further development of the SmartWire TM technology for module assembly of Buss Bar free cells will be carried on for monofacial and bifacial modules. The goal is to achieve a 21% module efficiency with manufacturing costs bellow 0.65 CHF/Wp at the mass production level. Finally, the 3 generation of modules that will be produced will be installed outdoor and compared to commercially available modules. Based on the collected data, the performance ratio (target >91%) and the real cost per produced kWh will calculated. 10 μm ultra fine Ni – Cu platted line on a textured HJT solar cell structure of a silicon heterojunction solar cells Current Status The Roth & Rau Research R&D equipments have been successfully transfered into the new infrastructructures. A monofacial buss bar free cell with an efficiency above 23% has been processed in small R&D equipments. The next steps are the installation and ramp-up of the pilot tools & the development of new cell structure and metallization scheme combined into modules. This project is supported by
Transcript of 1, 1 2 1) 2) 3) 4)...3) Meyer Burger, Schorenstrasse 39, CH-3645 Gwatt (Thun), Switzerland. 4) Pasan...
The Swiss Inno-HJT project:
Fully integrated R&D to boost Si-HJT module performance
B. Strahm1,, D. Lachenal1, D. Bätzner1, W. Frammelsberger1, B. Legradic1, J. Meixenberger1, P. Papet1, G. Wahli1, M. Despeisse2, A. Faes2,
A. Lachowicz2, C. Allebé2, P.-J. Alet2, M. Bonnet-Eymard2, C. Ballif2, Y. Yao3, C. Rychen3, T. Söderström3, J. Heiber3, S. Leu3, J. Hiller4 & V. Fakhfouri4 1) Roth & Rau Research SA, Rouges-Terres 61, CH-2068 Hauterive, Switzerland. ) [email protected]
2) CSEM, Rue de la Maladière 71, CH-2000 Neuchâtel, Switzerland. 3) Meyer Burger, Schorenstrasse 39, CH-3645 Gwatt (Thun), Switzerland.
4) Pasan SA, Rue Jaquet-Droz 8, CH-2000 Neuchâtel, Switzerland.
Smart Wire TechnologyTM
cell interconnection for
Buss bar free cells
During the recent year, it has been proven that silicon heterojunction (Si-HJT) solar cells can achieve efficiencies close to 25 % using simple cell
structure. However, most of these record cells have been achieved at the R&D scale and only few companies are producing Si-HJT cells and modules on
a mass production scale. In light of this observation, Meyer Burger together with the PV-Center of CSEM and the contribution of the Swiss Federal Office
of Energy and the State of Neuchâtel have started end 2013 a project to perform fully integrated R&D at the pilot scale with an overall budget of 10
millions CHF over 3 years. The Swiss Inno-HJT project brings together the development from the sawing of thin wafers using diamond wire technology,
advanced cell concepts using proved Roth & Rau deposition equipments for Si-HJT cell production and low cost metallization by plating at pilot scale at
CSEM. These cells will be then integrated in monofacial and bifacial modules using the SmartWire technology and will be measured and monitored in
outdoor conditions to show the benefits in terms of kWh produced by Si-HJT modules compared to commercially available modules.
The wafer division of Meyer Burger in Thun will
further improve the ingot slicing using diamond
wire technology. Wafer thickness will be reduced
from the 180 mm standard to bellow 140 mm to
increase the number of wafers per ingot. The
influence of the sawing process on the solar cell
manufacturing and performance will be studied
to reduce cost and improve efficiency.
New infrastructure with industrial tools has been
set-up at Roth & Rau Research in Hauterive.
New solar cell structures will be introduced
based on the silicon heterojunction technology.
These new cell concepts will enable cell
efficiencies >23% with reduced cost of
production.
The PV Center of CSEM will set-up a pilot line
for low cost metallization based on copper
plating to replace the more expensive silver
screen printing. Different process flows will be
tested with the goal to achieve line width bellow
30 mm on bifacial cell structure.
The introduction of new cell and metallization
technologies makes necessary the introduction
of adequate metrology equipments and methods.
Pasan SA will develop new measurement
product in order to set the standards for the
measurement of buss bar free bifacial cells
having high capacitance.
Three generations of modules will be produced
based on the 3 generations of cells. Further
development of the SmartWireTM technology for
module assembly of Buss Bar free cells will be
carried on for monofacial and bifacial modules.
The goal is to achieve a 21% module efficiency
with manufacturing costs bellow 0.65 CHF/Wp at
the mass production level.
Finally, the 3 generation of modules that will be
produced will be installed outdoor and compared
to commercially available modules. Based on the
collected data, the performance ratio (target
>91%) and the real cost per produced kWh will
calculated.
10 µm
ultra fine Ni – Cu platted
line on a textured HJT
solar cell
structure of a silicon
heterojunction solar cells
Current Status
The Roth & Rau Research R&D equipments have
been successfully transfered into the new
infrastructructures. A monofacial buss bar free cell with
an efficiency above 23% has been processed in small
R&D equipments.
The next steps are the installation and ramp-up of the
pilot tools & the development of new cell structure and
metallization scheme combined into modules.
This project is supported by
