2-Phenylnaphthalene is an organic compound consisting of a naphthalene core substituted with a phenyl group at the 2-position. It is a solid with a molecular formula of C₁₆H₁₂ and a molecular weight of 204.27 g/mol. This compound is primarily recognized as a key organic semiconductor material and a fundamental building block in the field of organic electronics. Its rigid, planar, and conjugated aromatic structure makes it a valuable core unit for constructing advanced organic light-emitting diode (OLED) materials, particularly as a host or dopant material in the emissive layer. Derivatives of 2-phenylnaphthalene are extensively researched and utilized to develop high-efficiency, blue-emitting OLED devices for displays and lighting applications due to their favorable photophysical and charge-transport properties. In synthetic chemistry, 2-phenylnaphthalene serves as a versatile organic synthesis building block. It is used in cross-coupling reactions and as a precursor for more complex polycyclic aromatic hydrocarbons (PAHs) and functionalized organic semiconductors. Its thermal stability and electronic characteristics are central to its utility in material science.