silver

Scientists led by staff from Germany’s Fraunhofer ISE have demonstrated a new laser printing process in pilot production, which could replace silver paste and screen printing in solar cell manufacturing. The system is said to offer much more flexibility in the layout of contact fingers on the cell surface and a wider choice of metallization materials.

Using an innovative high-speed video setup, scientists in Germany were able to observe the screen-printing process used in solar cell metallization, on a time scale of less than 50 milliseconds. Insights into the paste’s behavior and the mechanisms at work during screen printing will improve the process and the formulation of the silver paste it relies on.

Solar Inventions, the winners of the first American-Made Solar Prize, plan to commercialize their newest product, which is claimed to reduce silver content and increase module power, while potentially saving manufacturers up to $1 million per year.

Silver prices reached their highest levels this week since 2016. But Michael DiRienzo, executive director of The Silver Institute, says prices are still not high enough to complicate silver supplies for the PV industry.

A cell interconnection method developed by a Swedish company promises lower-cost and higher-throughput production of PERC and more advanced silicon PV modules. The process is ready to move to pilot production, and its creators want to play a role in the anticipated European solar manufacturing renaissance.

The SOL 7 series comprises five products for Perc, Topcon and heterojunction devices.

A Silver Institute study says demand for the precious metal for solar manufacturing accounted for 11% of global consumption last year but reduced solar generation capacity up to 2023 will eat into that figure and ‘thrifting’ technological advances will kick in after that point.

According to the 2020 World Silver Survey 2020 by the U.S.-based Silver Institute, the metal’s price will decline by only 3% this year, despite the impact that the Covid-19 crisis will also have on demand. In the global PV industry, silver demand is forecast to drop 3% from 98.7 million ounces in 2019 to 96.1 million ounces this year.

A team tasked by the European Commission with estimating the raw material requirements of the European energy transition found if global PV roll-out is high, and the component requirements of certain solar technologies don’t improve by a greater margin, some elements could end up in short supply.

Estonian researchers have developed a new monograin powder technology made of microcrystals, which can form parallel connected miniature solar cells in a large module. By replacing copper with silver in the absorber material, the researchers were able to increase the efficiency of the cells by more than 2%.