Perovskite materials have been intensively studied for photovoltaic applications and the research exploration is also rapidly expanding to other applications. At this stage, to further advance the field, better understanding is critically needed in a number of perspectives. In this regard, innovative experimental approaches as well as theories/simulations will be beneficial to gain insight into topics such as current-voltage hysteresis, ion migration, photophysics, perovskite formation and degradation, energy levels and energetics considerations, the role of defects, the function of organic cations, etc. In addition, for perovskite-based devices to get prepared for and eventually realize industrialization, it will be necessary to evaluate the toxicity of Pb-containing perovskites and environmental impact in a quantitative fact-based way, develop reproducible fabrication processes that can be scaled up for high-through production, and search for solutions to increase the lifespan of perovskite based devices. Also, promising research has been burgeoning and expanding the applications of perovskite materials and devices beyond photovoltaics. This symposium aims at providing a common ground for researchers in the field to efficiently disseminate and discuss their progress, views and future research directions.