Review on efficiency improvement effort of perovskite solar cell

Perovskite materials have outstanding optical and electronic properties. In recent years, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) in the laboratory has raised rapidly from 3.8% to 25.5%. It has the potential to further improve the PCE of solar cells and approach the Shockley-Queisser (SQ) limit. For preparing high-efficiency PSCs, the chemical composition tuning and morphology improvement of the perovskite absorption layer, the energy level matching of the interface, the extraction and transport rate of carriers in the transport layer are focused widely. Many methods such as additive engineering, defect passivation, interface engineering, and transmission material optimization are suggested. This review summarizes efficiency improvement effort of perovskite solar cell from the three dimensions of perovskite absorption layer, charge transport layer and interface.