The Genesis and Latest Developments of Perovskite Solar Cells

Since the invention of the practical solid-state perovskite solar cell by Park's group in 2012, perovskite photovoltaics have shown remarkable progress, achieving certified efficiencies of 26.7% in single-junction, small-area devices and 34.6% in tandem structures with a silicon solar cell as the bottom layer. These efficiencies surpass those of existing photovoltaic materials and technologies. The commercialization of perovskite solar cells is now just around the corner. This talk will provide a detailed account of the genesis of practical solid-state perovskite solar cells, followed by the latest advancements, including facet engineering of perovskite films, buried interface engineering, additive engineering, surface passivation through post-treatments using Hammett constant control, and photo-doping of spiro-MeOTAD to enhance both efficiency and stability. Additionally, we will introduce a novel tandem structure: the detachable, reassemblable perovskite/Si tandem concept. Efficiencies exceeding 26% have been achieved with an inverted structure by homogenizing cations and applying molecular assembly in the p-type layer.