2-Phenylnaphthalene is primarily utilized in the field of organic electronics due to its excellent photophysical properties. It serves as a key component in the development of organic light-emitting diodes (OLEDs), where it enhances the efficiency and stability of the devices. The compound is also employed in the synthesis of advanced materials for optoelectronic applications, including sensors and photovoltaic cells. Additionally, its ability to form stable complexes with other organic molecules makes it valuable in the creation of novel fluorescent dyes and probes for biological imaging. In research, 2-Phenylnaphthalene is often used as a model compound to study the photochemical behavior of polycyclic aromatic hydrocarbons, aiding in the understanding of their environmental impact and degradation pathways.