Solar Cells: Diffraction‐Grated Perovskite Induced Highly Efficient Solar Cells through Nanophotonic Light Trapping (Adv. Energy Mater. 12/2018)

In article number 1702960, Yanlin Song, Mingzhu Li and co-workers report a simple and reproducible imprinted method to construct light-trapping with periodic micro-nano diffraction-grating structures on a perovskite active layer using optical discs (CD and DVD). Diffracted light is confined within the perovskite absorption layer by total internal reflection when diffraction occurs. The diffraction-grating perovskite devices achieve a high power conversion efficiency of 19.71%.