What does phosphor mean?
A phosphor is a material that absorbs energy and then emits light, often after the energy source has been removed. This property made phosphors important in fluorescent lamps, cathode-ray tubes, radar screens, instrument displays, and modern display technologies. A phosphor may be described as phosphorescent when it continues glowing after excitation, although the broader term phosphor is also used for materials whose light emission is carefully controlled. In electronics, a phosphor coating is applied to a screen or display surface so that it can convert electrical or other energy into visible light. The word is usually technical rather than conversational, and related compounds such as phosphorescent and phosphorescence describe the characteristic glow associated with these materials. Phosphor bronze, by contrast, is an alloy containing copper, tin, and phosphorus, rather than a material primarily valued for light emission.
nounA substance that emits light after being excited by radiation, electricity, or another form of energy. The term is also used for a light-emitting coating on screens and other electronic display devices.
- A substance that emits light after absorbing energy.
- A coating or material containing such a substance, especially on a display screen.
- A material used in signal lamps, instrument panels, and other illuminated or display devices.
"The monitor uses a phosphor coating that produces a bright, clear image."
"The old oscilloscope displayed the signal on a green phosphor screen."
"Phosphor coatings can be used to create highly efficient lighting panels."
Used when referring to different phosphor materials or components, especially in technical contexts.
"The manufacturer tested several phosphors to improve the display's brightness."
A phosphor can briefly store energy and release it as light, making it the glowing material behind many screens and indicators.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does phosphor come from?
The word comes from Greek phōs, meaning “light,” and phoros, meaning “bearing” or “carrying,” together referring to something that carries or brings light. The term entered English through scientific and technical usage concerning substances that glow after exposure to light or other forms of energy. Its relatives include phosphorus, phosphorescent, and phosphorescence, all reflecting the same Greek root associated with light.
How phosphor is actually used
The term is primarily technical and appears in electronics, lighting, imaging, and materials science. In general usage, it may refer either to the light-emitting material itself or to a coating containing it.
Easily confused with phosphor
Phosphor is a light-emitting substance or display coating, whereas phosphorus is the chemical element with atomic number 15.