Quasi-2D Ruddlesden–Popper-type perovskites (RPPs) exhibit excellent nonlinear optical properties due to their multiple quantum well structures with large exciton binding energy. Herein, we introduce chiral organic molecules into RPPs and investigate their optical properties. It is found that the chiral RPPs possess effective circular dichroism in the ultraviolet to visible wavelengths. Two-photon absorption (TPA)-induced efficient energy funneling from small- to large-n domains is observed in the chiral RPP films, which induces strong TPA with a coefficient up to 4.98 cm MW−1. This work will broaden the application of quasi-2D RPPs in chirality-related nonlinear photonic devices.

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The research on the optical properties of chiral perovskite materials is currently one of the hot topics, which are expected to be applied in various optoelectronic devices. Meanwhile, the nonlinear optical (NLO) properties of these chiral materials have attracted extensive attention, but there are few reviews that summarize the relevant research progress. In this review, we summarize the research progress of chiral perovskite materials, including their optical activity and nonlinear optics. First, we discuss the basic structures of chiral perovskite materials and their construction methods. Second, we review the optical activities and NLO properties of various chiral perovskite materials. Finally, we look forward to the application prospects of chiral perovskite materials in the field of nonlinear optics and propose the relevant challenges.