Used in luminescent materials such as glow-in-the-dark paints, dials, and signage due to its phosphorescent properties when doped with activators like copper or silver. Commonly found in cathode ray tubes (CRTs) and X-ray screens for its ability to emit light under electron or radiation exposure. Employed as a pigment in paints, plastics, and coatings where opacity and brightness are needed. Utilized in solar cells and semiconductor devices because of its favorable band gap and optoelectronic characteristics. Applied in some types of infrared optical windows and lenses due to its transparency in the infrared spectrum. Also used in the synthesis of other zinc compounds and in certain types of sensors.