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Press Release - Schmid Group - Leading Production Equipment Supplier
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Woon-Hong Jung
Oct 30, 2012, 6:32:36 PM10/30/12
to
SCHOTT Solar and SCHMID Group
lift PERC Efficiency Records to Values
of up to 21%
New record results demonstrate successful technology transfer between the two partners
20.74% PERC cell with SCHMIDS APCVD Al2O3-Passivation
21.0% PERC cell with optimized screen-printed silver contacts
SCHOTT Solar and the SCHMID Group demonstrate the successful transfer of the latest developments of SCHOTT Solar's passivated rear side contact technology by achieving new efficiency records for so called PERC solar cells. Using SCHMID's new APCVD manufacturing equipment to apply a rear side aluminum oxide passivation layer and employing SCHOTT Solar's improved emitter technology a cell efficiency of 20.74% was reached. By further optimization of the screen-printed front side metallization, the world's first 21% efficient industrial size 156mm x 156mm p-type Cz-Si solar cell was manufactured at SCHOTT Solar. Both efficiency values are independently confirmed by ISE CalLab in September 2012.
"These results, achieved by simple process sequences developed by our experienced team, impressively demonstrate the potential to reach more than 21% cell efficiency using cost effective next generation manufacturing technologies," Dr. Axel Metz, Director of Solar Cell Development at SCHOTT Solar states. "Moreover, all steps are available in multiple process options as shown by our cells with electroplated NiCu front contacts reaching top efficiencies of 20.9%. This offers great flexibility for the implementation in industrial mass production," he adds.
Dr. Christian Buchner, Vice President of SCHMID's cell business unit, points out that the cell concept is based on industry established technology and reaches the same efficiency potential as other technologies like, for example HJT but with lower conversion costs.
Key features of the new record cells
Commercially available 156 mm x 156 mm p-type Czochralski wafers
Industrial dielectric rear side passivation technology
Improved emitter technology
Optimised front side metallization
About PERC
PERC (Passivated Emitter and Rear Contact) is a technique on backside passivation of crystalline silicon solar cells that SCHOTT Solar has further developed for use in industrial mass production and recently licensed to the SCHMID Group. Improvement of the backside alone can already increase efficiency by a full percentage point. The technique can be applied to various types of wafer materials like monocrystalline and polycrystalline, and also quasimono. It can also be combined with high-efficiency technologies for the front sides of cells to open up even greater potential for further increases in efficiency. These also include the selective emitter technology and advanced metallization techniques offered by the SCHMID Group for complete PERC cell production lines as well as multi busbar module production.
http://www.schmid-group.com/en/press-corner-news/press-releases/p107/schott-solar-and-schmid-lift-perc-efficieny-to-up-to-21.html
lift PERC Efficiency Records to Values
of up to 21%
New record results demonstrate successful technology transfer between the two partners
20.74% PERC cell with SCHMIDS APCVD Al2O3-Passivation
21.0% PERC cell with optimized screen-printed silver contacts
SCHOTT Solar and the SCHMID Group demonstrate the successful transfer of the latest developments of SCHOTT Solar's passivated rear side contact technology by achieving new efficiency records for so called PERC solar cells. Using SCHMID's new APCVD manufacturing equipment to apply a rear side aluminum oxide passivation layer and employing SCHOTT Solar's improved emitter technology a cell efficiency of 20.74% was reached. By further optimization of the screen-printed front side metallization, the world's first 21% efficient industrial size 156mm x 156mm p-type Cz-Si solar cell was manufactured at SCHOTT Solar. Both efficiency values are independently confirmed by ISE CalLab in September 2012.
"These results, achieved by simple process sequences developed by our experienced team, impressively demonstrate the potential to reach more than 21% cell efficiency using cost effective next generation manufacturing technologies," Dr. Axel Metz, Director of Solar Cell Development at SCHOTT Solar states. "Moreover, all steps are available in multiple process options as shown by our cells with electroplated NiCu front contacts reaching top efficiencies of 20.9%. This offers great flexibility for the implementation in industrial mass production," he adds.
Dr. Christian Buchner, Vice President of SCHMID's cell business unit, points out that the cell concept is based on industry established technology and reaches the same efficiency potential as other technologies like, for example HJT but with lower conversion costs.
Key features of the new record cells
Commercially available 156 mm x 156 mm p-type Czochralski wafers
Industrial dielectric rear side passivation technology
Improved emitter technology
Optimised front side metallization
About PERC
PERC (Passivated Emitter and Rear Contact) is a technique on backside passivation of crystalline silicon solar cells that SCHOTT Solar has further developed for use in industrial mass production and recently licensed to the SCHMID Group. Improvement of the backside alone can already increase efficiency by a full percentage point. The technique can be applied to various types of wafer materials like monocrystalline and polycrystalline, and also quasimono. It can also be combined with high-efficiency technologies for the front sides of cells to open up even greater potential for further increases in efficiency. These also include the selective emitter technology and advanced metallization techniques offered by the SCHMID Group for complete PERC cell production lines as well as multi busbar module production.
http://www.schmid-group.com/en/press-corner-news/press-releases/p107/schott-solar-and-schmid-lift-perc-efficieny-to-up-to-21.html
Lu Wei
Oct 31, 2012, 4:11:05 AM10/31/12
to
Great news, would be greater if it's really cost effective to get into
mass production.
--
Regards,
Lu Wei
PGP key ID: 0x92CCE1EA
mass production.
--
Regards,
Lu Wei
PGP key ID: 0x92CCE1EA
Message has been deleted
Lu Wei
Nov 1, 2012, 12:54:34 AM11/1/12
to
I'd rather be more prudent. As an established business, Sunpower could
provide panel of 20% efficiency with cell of about 22%, which mean's
it's a mass production result; while SCHOTT Solar and SCHMID Group's
result can only be regarded as the highest "reached" R&D level, where
considerable time and efforts and reduction due to mass population lie
ahead.
And yes, even cut 0.6% to that result as a mass production prediction
according to my experience, it is still very promising. Two highlights -
APCVD grown Al2O3 and electroplated NiCu front contacts play the key
role. I will see whether I can contact them to do some demo.
provide panel of 20% efficiency with cell of about 22%, which mean's
it's a mass production result; while SCHOTT Solar and SCHMID Group's
result can only be regarded as the highest "reached" R&D level, where
considerable time and efforts and reduction due to mass population lie
ahead.
And yes, even cut 0.6% to that result as a mass production prediction
according to my experience, it is still very promising. Two highlights -
APCVD grown Al2O3 and electroplated NiCu front contacts play the key
role. I will see whether I can contact them to do some demo.
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