Materials Science

One year after announcing an efficiency record, Empa scientists have achieved a new mark of 22.2% for flexible CIGS solar cell on polymer film. Solar cells of this type are especially suited for applications on buildings, vehicles, satellites, airships, and mobile devices.

In the FOXIP project, researchers form Empa, EPFL and the Paul Scherrer Institute attempted to print thin-film transistors with metal oxides onto heat-sensitive materials such as paper or PET. The goal was ultimately not achieved, but those involved consider the project a success – because of a new printing ink and a transistor with "memory effect".

Which are the next walls to fall in science and society? Guided by this question, the brightest minds in the international scientific community submitted their groundbreaking projects for the prestigious "Falling Walls Science Breakthrough of the Year 2022". The jury has made its choice - selecting among 95 nominations a project led by Empa researcher Roman Fasel as one of ten winners in the "Physical Sciences" category.

Canadian researchers have discovered that they can stick hydrogel plasters to the skin very effectively using ultrasound. ETH Zurich professor Outi Supponen has now explained the underlying mechanism: imploding bubbles that form within the adhesive located between the plaster and the skin anchor the one on the other.