Molecular Engineering of Interface Modifiers for Efficient and Stable Perovskite Solar Cells

Abstract

Since 2009, power conversion efficiencies (PCE) of perovskite solar cells (PSCs) has been rising from the initial 3.8% to the state-of-the-art 25.7% within over the past 10 years. Most highly efficient PSCs utilize an n-type layer of mesoporous titanium dioxide or tin oxide in an n-i-p device configuration, in which organic conductors are widely used to transport holes into an adjoined metal. Thus far, a variety of efforts have been devoted to achieve a defect-less perovskite film with high-quality morphologies for realizing reduced loss-in-potential outcomes and enhanced efficiency levels. As a result, these holistic advancements in interface engineering, composition engineering, and charge-transporting layer engineering for perovskite solar cells enable us to achieve a PCE of over 25%. In this talk, I will briefly introduce our recent advances and understanding of the limitation to improving the photovoltaic performance further.[1,2] In particular, I will focus on talking about molecular engineering of interface modifiers and charge-transporting layers for enhancing both efficiency and stability of perovskite solar cells.[3]