Acridone is a heterocyclic organic compound with the molecular formula C13H9NO. It is a yellow crystalline solid and serves as the parent structure for a wide range of derivatives. Its core structure consists of a planar, fused ring system containing a carbonyl group, which is crucial for its electronic properties. The primary application of acridone and its derivatives is in the field of organic electronics and photonics. They are extensively used as key building blocks for organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and as fluorescent dyes and sensors. The acridone scaffold is valued for its strong fluorescence, good electron-transporting ability, and thermal stability, making it an excellent candidate for host materials, emitters, and charge-transport layers in optoelectronic devices. Beyond materials science, acridone derivatives also exhibit significant biological activities, including antimicrobial, anticancer, and anti-inflammatory properties, positioning them as important pharmacophores in medicinal chemistry research. Consequently, acridone itself is a fundamental synthetic intermediate for constructing these functional molecules across multiple disciplines.