Ultra-Thin Silver Layer (IMAGE) Ruhr-University Bochum Caption On this silicon substrate, the researchers have applied an ultra-thin layer of silver. Credit RUB, Marquard Usage Restrictions This image may only be used for reporting about the Ruhr-Universitaet Bochum in the context of the press release "Ultra-thin transparent silver films for solar cells" published in November 2018. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.