Geometric light trapping for high efficiency thin film silicon solar cells

► Micrometric pyramids as anti-reflective texture for thin film solar cells. ► Post-process device step for increase light in-coupling and enhance light trapping. ► Idea tested at the front glass of thin film silicon micromorph devices. ► 5% total current gain leading to13% cell efficiency. ► 7.3% top current gain pointing to a higher interplay with the intermediate reflector.