Overview
- The method enables conformal perovskite films on micrometer-textured silicon wafers used in commercial cells, marking the first successful vapor-deposited tandems on true industrial textures.
- Devices recorded T90 lifetimes exceeding 1,400 hours at 85°C under 1‑sun illumination and maintained operational stability beyond 2,000 hours.
- A custom molecular helper that binds to silicon balanced precursor adsorption during growth, producing uniform, durable films over steep pyramid features.
- The tandem cells surpassed 30% power-conversion efficiency, signaling gains beyond the ~22–24% range typical of single‑junction silicon.
- The team led by Assistant Professor Hou Yi reported the findings in Science and is advancing toward large-area modules, pilot manufacturing integration, and outdoor durability testing.