European Photovoltaic Solar Energy Conference and Exhibition (Hall 1, Booth C14) - At this week’s European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2014, nanoelectronics research center imec, and RENA, a leading supplier for wet chemical production tools, present a novel isopropyl-alcohol (IPA)-free process for the texturing of Cz-Si wafers for high-efficiency silicon solar cell manufacturing at low cost.
The process uses monoTEX® F, RENA’s next generation texturing additive, instead of the currently used industrial additive IPA. In contrast monoTEX® F is a moderating and wetting agent that behaves almost “linear” towards changes in process temperature and alkali concentration and operates at temperatures far below its boiling point . It will thus not evaporate, resulting in stable concentration of ratios in the etching mixture during the texturing process step. As a result, monoTEX® F based texturing simplifies the texturing of Cz-Silicon wafers, widens the texturing process window, and increases texturing bath lifetime (i.e. more wafers can be processed in a single texturing bath compared to state-of-the-art IPA-based texturing).
“When applying this novel monoTEX® F-based texturing in our Si PV pilot line to process large area (156x156 mm2) PERC-type solar cells, we achieved excellent conversion efficiencies well above 21%,,” stated Dr. Joachim John, R&D project manager at imec. “We are confident that RENA’s monoTEX® F-based texturing process is an excellent candidate to be considered for next generation high volume Cz-silicon solar cell manufacturing.”
“We are very happy that in a first class institution like imec one can take advantage of our texturing agent monoTEX® F. The achieved uniformity and reflection data from imec are consistent with mass production data,” Dr. Jürgen Schweckendiek, R&D project manager at RENA, pointed out.
“THE WET PROCESSING COMPANY” RENA (rena.com) is one of the world's leading supplier of production equipment for wet chemical surface treatment. RENA products are used in the areas of application Green Energy, Medical and Electronics, which reflect the vital needs of people living in today's industrial society. RENA products are used to treat surfaces of e.g. solar cells, semiconductor wafers or dental implants using wet chemicals or water. RENA produces standardized machines with guaranteed processes as well as systems tailored to specific customer requirements.
50% of all solar cells are processed on RENA inline or batch equipment. Main applications on RENA production machines for the solar industry are texturing, junction isolation and cleaning.
Imec (imec.be) performs world-leading research in nanoelectronics. 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 over 2,080 people includes more than 670 industrial residents and guest researchers. In 2013, imec's revenue (P&L) totaled 332 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 (Shanghai) Co. Ltd.) and imec India (Imec India Private Limited)
Norbert Bürger, Manager Marketing
T: +49 7723 9313 19 - E: norbert.buerger[.]rena.com.