Frontispiece: Slicing Diamond—A Guide to Deriving sp 3 ‐Si Allotropes

Silicon Silicon is the most important material for solar cells. However, its low conversion rate/quantum efficiency requires a rather high material consumption. Thus, researchers undertake enormous experimental and theoretical efforts to find alternative Si allotropes with a better efficiency and in the ideal case a direct electronic band gap. In the Review article on page 2734 ff., T. F. Fässler and co‐workers describe a new approach to the search for promising Si structures.