Day4 Energy, Roth & Rau Reach Efficiency Milestone

Day4 Energy Inc., a provider of solar photovoltaic products, and Roth & Rau (R&R), a supplier of mass production equipment for solar cell production, have created a module with an efficiency of 19.3% (cell area). The new cells and PV modules utilize R&R's Heterojunction technology and Day4's DNA technologies.

According to the companies
, these technologies offer superior passivation properties compared to standard cell processing technologies, leading to high efficiency and favorable temperature behavior. Moreover, the production process has very few production steps and is fully compatible with thin wafer technology.

Day4's DNA technology has enabled fine-line fingers of 70 microns in width and 10 microns in height, resulting in a 2% short circuit current gain and a 69% silver paste savings when used in the R&R Heterojunction cells, the companies add.

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