Efficient, Stable and Scalable 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 (Nature 2021, 590, 587; ACS Energy Lett. 2022, 7, 2084). 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 (Adv. Energy Mater. 2022, 12, 2200758). Finally, I will review our efforts to realize scale-up of PSCs toward practical applications (Energy & Environ. Sci. 2020, 13, 4854; Nature Comm. 2020, 11, 5146).