PHOSPHOR

Phosphors in general are materials that emit light upon absorbing incident energy. They have a broad range of light color emissions and can absorb and convert energy from various forms such as optical, electrical, even mechanical or thermal. The term "scintillator" is sometimes used to describe phosphors that produce luminescence when excited by ionizing radiation... Phosphors are the most popular choice as color emitters and converters in most lighting and display technologies. In solid-state lighting, LED phosphors (also known as down-converters or luminophores) have been utilized to convert ultraviolet, violet or blue light (usually from a semiconductor light-emitting diode or laser) into colors of lower energy. Depending on the specific LED or laser architecture and power levels, phosphor powders can be encapsulated in polymers (silicone/epoxy), or glass and ceramic. Visible phosphor emission colors range from violet/blue to deep red. Some can also absorb and emit energy in the..