Opinion

Recently the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has approached 25.2%. The theoretical Shockley-Queisser limit of power conversion efficiency of such materials with a bandgap of 1.6 eV is 30%. The remaining gap between theoretical limit and experimentally achieved PCE is possibly due to various types of defects distributed at the grain boundaries, surfaces and interfaces in the perovskite material hamper the efficiency improvements in the perovskite solar cells. In order to address surface defects different passivation schemes have been proposed recently. Here in this document, an overview of recent advancements in the knowledge of passivation schemes for PSCs has been summarized.