A Mini‐Review on Perylene‐Based Carbon Dots: Synthetic Strategies, Property Regulation, and Functional Applications

ABSTRACT Carbon dots (CDs) have emerged as promising carbon‐based nanomaterials owing to their excellent water dispersibility, biocompatibility, luminescence efficiency, chemical stability, and facile synthesis. Nevertheless, conventional CDs are often constrained by their relatively wide bandgaps, low photoluminescence quantum yield (PLQY) at long wavelengths, and poor charge‐transport properties arising from their small sp 2 ‐conjugated domains. Incorporating polycyclic aromatic hydrocarbon precursors with extended π ‐conjugation has therefore become an effective strategy for tailoring the electronic structure, emission properties, and excited‐state behavior of CDs. Among these materials, perylene and its derivatives have attracted particular interest because of their large planar π ‐conjugated frameworks, strong visible‐light absorption, high electron mobility, and excellent photochemical stability. Consequently, perylene‐based CDs have evolved from simple CD‐perylene hybrid systems into advanced nanostructures exhibiting efficient red and near‐infrared emission, near‐unity PLQY, and enhanced charge transport. These materials show great potential in light‐emitting diodes, biophotonic therapy, solar cells, and advanced photonic devices. This review summarizes recent advances in perylene‐based carbon nanomaterials, focusing on synthetic strategies, structure‐property relationships, and multifunctional applications, while highlighting current challenges and future opportunities in this rapidly developing field.