Abstract: Perylene diimides (PDIs) and their derivatives are organic semiconductor materials with exceptional optoelectronic properties, extensively researched and applied in high-tech fields such as organic photovoltaics, organic light-emitting diodes, and organic field-effect transistors in recent years. Their advantages—such as low cost, strong visible light absorption, ease of band edge modulation, and the ability to form ordered supramolecular structures—have positioned them as rising stars in photocatalysis. This article incorporates elements of Chinese traditional culture and employs a personified approach in the form of a martial arts tournament to illustrate the structures and characteristics of PDI materials. By comparing the photocatalytic performance of PDIs with other photocatalytic materials, the paper highlights the advantages and challenges of PDIs in photocatalysis and offers insights into their promising development prospects in this field.

Key words: Perylene diimide, Photocatalytic materials, Molecular design, Morphology regulation, Composite materials