Double‐sided nano‐textured surfaces for industry compatible high‐performance silicon heterojunction and perovskite/silicon tandem solar cells

Abstract Nano‐textured surfaces are an intriguing approach for optimizing the optical characteristics monolithic perovskite/silicon tandem solar cells. Here, development of different textures silicon using various commercial additives is presented and their performance in heterojunction (SHJ) SHJ–perovskite cells discussed. After electrical characterization, we show that nano‐textured can easily compete with standard textured surfaces, yielding higher average efficiencies single junctions. In addition, compatibility solution‐processed perovskite top demonstrated, a cell efficiency >28% on bottom nano‐texture both sides.