Among the types of new and renewable energy, perovskite solar cells, which are next-generation solar cells, are capable of a solution process at a low temperature of 200oC or less, and have the advantages of high efficiency and low cost; hence, many studies have been conducted. Research has been performed on perovskite solar cells mainly produced using spin coating, but they have a disadvantage of occurrence of pinholes and cracks when fabricated over a large area, reducing the uniformity and density of the thin film. For the production of large-area perovskite solar cells, research is underway using solution shearing process technology among printed electronic process technologies, and most of the processes have been carried out at low speeds. This is due to the size of the crystal, which is one of the most important factors of high efficiency of the solar cell. When printing at high speed for mass production, the size of the crystal is reduced, resulting in charge loss and lower efficiency, making it difficult to apply the roll-to-roll process. In this study, to apply the roll-to-roll process for mass production, perovskite crystallization experiments were performed under high-speed conditions and crystal size changes according to meniscus stability.

With increasing demand for disaster response robots, many governments projects have been launched to ensure safety for citizens. This paper reviews government policies and research trends on disaster response robots. To give a bird"s eye view on disaster response robots, we first reviewed foreign technologies. We then introduced recent technologies developed in Korea and some ongoing researches on disaster response robots.