Perovskite Emitters as a Platform Material for Down-Conversion Applications

Methods to overcome the instability of perovskites to moisture, light, and heat in down-converted displays (DCDs), in which films of perovskite emitters are placed on top of the backlight unit and convert its light to a desired color, are reviewed here. First, the photophysical properties of perovskite emitters as light converters in DCDs are discussed. Second, five strategies to improve stability of perovskite emitting materials (PeMs) mostly in a form of perovskite nanoparticles (PeNPs) are summarized: i) encapsulation in inorganics, ii) encapsulation in polymer, iii) semiconductor shelling, iv) ligand engineering, and v) defect engineering. Third, examples of DCDs that use perovskite emitters are presented. Finally, future perspectives for the commercialization of perovskite emitters as a next-generation material that can be applied to DCDs are outlined.