Advances in femtosecond laser synthesis and micromachining of halide perovskites

Perovskite materials have become a popular research topic because of their unique optical and electrical properties, that enable extensive applications in information storage, lasers, anti-counterfeiting, and planar lenses. However, the success of the application depends on accomplishing high-precision and high-quality perovskite patterning technology. Numerous methods have been proposed for perovskite production, including, a femtosecond laser with an ultrashort pulse width and ultrahigh peak power with unique advantages such as high precision and efficiency, nonlinearity, and excellent material adaptability in perovskite material processing. Furthermore, femtosecond lasers can induce precipitation of perovskite inside glass/crystals, which markedly enhances the stability of perovskite materials and promotes their application and development in various fields. This review introduces perovskite precipitation and processing via femtosecond lasers. The methods involved and advantages of femtosecond-laser-induced perovskite precipitation and patterning are systematically summarized. The review also provides an outlook for further optimization and improvement of femtosecond laser preparation and processing methods for perovskites, which may offer significant support for future research and applications of perovskite materials.