SEMINAR

Since 2009, power conversion efficiencies (PCE) of perovskite solar cells (PSCs) has rising from the initial 3.8% to the state-of-the-art 26.1% within over the past 15 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. In this presentation, I will briefly introduce the evolution and remarkable research progress in PSCs, and discuss several challenges that need to be addressed in improving the photovoltaic performance and enhancing the stability of the perovskite solar cells, i.e. (1) preparation of high crystalline film of FAPbI₃-based perovskites with controlled carrier mobility and light harvesting, (2) development of selective charge-transporting layers (CTL) with physically and electrically tuned property, and (3) interfacial control between the perovskite and the CTLs for reducing the surface defect and preventing the interfacial recombination. Finally, our recent works on scale-up of PSCs will be also discussed.