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Imec and SolarWorld Present Ultra-thin PERC-based PV Module that Achieves Class A Module Efficiencies - imec and SolarWorld will present ultra-thin (100µm), large-area (156x156mm2) PERC-type mono-silicon solar cells integrated in a 255Wp class A module
Imec and SolarWorld Present Ultra-thin PERC-based PV Module that Achieves Class A Module Efficiencies

 

PRZOOM - /newswire/ - Frankfurt, Germany, 2012/09/24 - imec and SolarWorld will present ultra-thin (100µm), large-area (156x156mm2) PERC-type mono-silicon solar cells integrated in a 255Wp class A module.

   
 
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EU PVSEC 2012 - At this week’s European Photovoltaic Solar Energy Conference and Exhibition (27th EU PVSEC, 24/08-28/08), imec and SolarWorld will present ultra-thin (100µm), large-area (156x156mm2) PERC-type mono-silicon solar cells integrated in a 255Wp class A module. The PERC-based modules, developed by imec and SolarWorld, were manufactured on SolarWorld’s fully automated production line without significant wafer breakage. This feat proves the robustness of the PERC technology and the high quality of SolarWorld’s module manufacturing. PERC-type silicon solar cells are promising candidates for next generation solar cell concepts for mass production because of their high conversion efficiencies combined with a reduced amount of silicon.

Although the price of silicon feedstock for PV has come down significantly, it still makes sense for cost and performance reasons to explore technology solutions for thin, high-efficiency crystalline Si solar cells. The production yield for thin cells is typically an obstacle hindering full industrial adoption. In addition to increasing the conversion efficiency for thin cells by improving surface passivation, PERC technology also reduces the internal stress in the cells. This potentially enables less critical handling of the thin wafers in manufacturing.

Imec and SolarWorld’s modules each contain 60 randomly selected i-PERC cells, co-fabricated by imec’s PV research group and SolarWorld Innovations (SWIN), starting from 120µm thin Cz-silicon wafer material. After surface decoupling and junction formation at SWIN, imec performed rear side passivation and rear laser ablation. The rear aluminum metallization was deposited at SWIN, while imec conducted the silver screen-printing, co-firing and characterization.

An averaged cell efficiency of 18.5 percent (+/- 0.5 percent) has been measured, with a best cell performing at 19 percent efficiency. Finally, enough cells for module production with 18.5 percent (+/-0.2 percent) were implemented in 60cell class A standard modules using SolarWorld’s module manufacturing line. Imec and SolarWorld’s modules demonstrated a power higher than 255Wp measured at SolarWorld’s Module Testing Lab.

“Despite the final thickness of the wafers of only 100µm, these cells could be run through SolarWorld’s fully automated standard module mass production,” said Johannes Kirchner, project manager at SolarWorld and department manager of the PV-Module Testing Lab.
Joachim John, R&D PV project manager at imec, stated: “We are delighted with this achievement as it is yet another demonstration of the industrial relevance of imec’s PERC technology. The low breakage rate in the i-PERC production and in the fully automated module fabrication, together with the narrow processing distribution of the cell results, demonstrate that a serious reduction of silicon material is feasible in highly efficient PERC solar cell production.”

This project is an example of a European cooperation of research institutes and production companies.

These results have been achieved in the framework of the EU project ULTIMATE where manufacturing processes and module integration have to be developed and finally demonstrated for thin silicon substrate in order to further reduce the (grams of Silicon per Watt peak).

About imec
Imec (imec.be) performs world-leading research in nanoelectronics and photovoltaics. Imec leverages its scientific knowledge with the innovative power of its global partnerships in ICT, healthcare and energy. Imec delivers industry-relevant technology solutions. In a unique high-tech environment, its international top talent is committed to providing the building blocks for a better life in a sustainable society. Imec is headquartered in Leuven, Belgium, and has offices in Belgium, the Netherlands, Taiwan, US, China, India and Japan. Its staff of close to 2,000 people includes more than 600 industrial residents and guest researchers. In 2011, imec's revenue (P&L) was about 300 million euro.

Imec is a registered trademark for the activities of IMEC International (a legal entity set up under Belgian law as a "stichting van openbaar nut”), imec Belgium (IMEC vzw supported by the Flemish Government), imec the Netherlands (Stichting IMEC Nederland, part of Holst Centre which is supported by the Dutch Government), imec Taiwan (IMEC Taiwan Co.) and imec China (IMEC Microelectronics (Shangai) Co. Ltd.) and imec India (Imec India Private Limited).

About SolarWorld AG
The SolarWorld AG Group (ISIN: DE0005108401) is a worldwide leader in offering brand-name, high quality, crystalline solar-power technology. Its strength is its fully integrated solar production. From silicon as the raw material through wafers, cells and modules all the way to turn-key solar systems of all sizes, the group combines all stages of the solar value chain. The central business activity is selling quality modules into the installation and distribution trades and crystalline wafers to the international solar cell industry. Group headquarters are located in Bonn, Germany, with sales sites in Singapore, South Africa, Spain, France as well as in the U.S. state of California. The group's largest production facilities operate in Freiberg, Germany and Hillsboro in the U.S. state of Oregon. Sustainability is the basis of the group strategy. Under the name Solar2World, the group supports care projects using off-grid solar-power solutions in developing countries, exemplifying sustainable economic development. Worldwide, SolarWorld employs about 3,000 people. SolarWorld AG has been quoted on the stock exchange since 1999 and today is listed on, among others, the TecDAX and ÖkoDAX as well as in the sustainability index NAI.

Contact:
Holst Centre - Koen Snoeckx, Communication Manager
T: +31(0)40 277 40 91 / M: +31(0)612 71 98 43 - E: Koen.Snoeckx[.]holstcentre.com.

 
 
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Imec and SolarWorld Present Ultra-thin PERC-based PV Module that Achieves Class A Module Efficiencies

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Contact: Hanne Degans - imec.be 
+32 16 28 17 69 / +32 486 065 175 (Mobile) Hanne.Degans[.]imec.be
 
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IMPORTANT INFORMATION: Issuance, publication or distribution of this press release in certain jurisdictions could be subject to restrictions. The recipient of this press release is responsible for using this press release and the information herein in accordance with the applicable rules and regulations in the particular jurisdiction. This press release does not constitute an offer or an offering to acquire or subscribe for any Imec securities in any jurisdiction including any other companies listed or named in this release.

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