Press release
Molybdenum-tantalum: The corrosion-resistant material for CIGS solar cells.
PLANSEE corrosion test
The company alloys pure molybdenum with small amounts of corrosion-resistant tantalum, and thereby combines the advanced properties of both metals. The superior corrosion resistance of molybdenum-tantalum (MoTa) has been proven in numerous tests. The picture shows the result of a corrosion experiment at elevated temperature (60 °C) and high humidity (90%): The carved thin films (layer thickness: 300 nm) of MoTa exhibit a much better corrosion resistance, compared with pure molybdenum.
Especially on polymer-based substrates like polyimide, the high water and oxygen permeation can result in an increased corrosion of the CIGS back contact. With its higher corrosion resistance MoTa can minimize this effect.
But MoTa not only functions as a back contact material. On flexible substrates like stainless steel foil and polyimide the new alloy can function as a corrosion resistant contact and protective layer. It effectively protects the backside of the stainless steel web during the selenization step in the CIGS manufacturing process.
PLANSEE is a world-leading manufacturer of products made from refractory metals and metallic composite materials. The privately owned company has been manufacturing innovative powder-metallurgically processed high-performance materials for over 90 years, and covers the whole production process, right from the raw material to the finished product. The company employs materials experts, product developers and local technical sales staff to provide customers all over the world with all the help and assistance they require.
PLANSEE SE
Nadine Kerber
Communications
nadine.kerber@plansee.com
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