Perovskite solar cells (PSCs) are a new class of photovoltaic materials that exhibit excellent optoelectronic properties and simplicity, as well as the potentially low cost of manufacturing. In 2021, the record conversion efficiency of PSCs is 25.5%, which is comparable with the most efficient, predominant silicon solar cells. The rapid progress in the research spheres is already followed by some companies. The first perovskite-based modules are expected on the market in the next few years.
Although PSCs are highly efficient as stand-alone, single-junction solar cells, their main application is as the upper cell in perovskite-silicon tandem solar cells. In this way, we successfully combine perovskite technology with the technology of conventional silicon solar cells. Their combination has the potential to exceed the effective conversion efficiency of 30%, thus ensuring a further fall in photovoltaic prices. We were involved in the development and testing of the currently most effective tandem cell with an efficiency of 29.2%. The paper was published in the journal Science.