Tetraphenylethylene is widely used in the field of materials science, particularly in the development of organic luminescent materials. Its strong fluorescence in the solid state makes it valuable for applications in organic light-emitting diodes (OLEDs) and solid-state lasers. The molecule exhibits aggregation-induced emission (AIE), meaning it emits more light when aggregated, which is contrary to many dyes that suffer from quenching in solid or aggregated forms. This property is exploited in designing efficient sensors, bioimaging probes, and optoelectronic devices. It is also used as a building block in stimuli-responsive materials that change emission properties in response to mechanical stress, temperature, or chemical environment, useful in smart materials and sensors.