electron emitters

Electron emitters are devices or materials that release electrons, tiny charged particles, into the surrounding environment. They work by applying energy—such as heat, electric fields, or light—that causes electrons to overcome the material's surface barriers and escape. Common types include thermionic emitters (heated materials), field emitters (strong electric fields), and photoemitters (light exposure). Electron emitters are essential in technology like electron microscopes, vacuum tubes, and display screens, enabling control and manipulation of electron flow for various applications.