- BLUE-GREEN AND GREEN PHOSPHORS FOR LIGHTING APPLICATIONS

摘要

Embodiments of the present invention provide a related family of phosphors 22 that can be used in an illumination system to generate blue or blue-green light. The phosphor 22 comprises a phosphor of the formula 1:;((Sr 1-z M z ) 1- (x + w) A w Ce x) 3 (Al 1-y Si y) O 4 + y + 3 (xw) F 1-y-3 (xw);In this formula,;x satisfies 0 x? 0.10;;y satisfies 0? y? 0.5;;z satisfies 0? z? 0.5;;w satisfies 0? w? x;;A is Li, Na, K, Rb, Ag, or any combination thereof,;M is Ca, Ba, Mg, Zn, Sn, or any combination thereof.;Advantageously, the phosphor 22 of formula (1) maintains the emission intensity over a wide temperature range. The phosphors may be used to generate blue and blue-green light in an illumination system, such as a light emitting diode (LED) 10 and a fluorescent tube. In addition, the phosphor may be used in the form of a mixture with other phosphors or in the form of a combined light emitting system to generate white light suitable for illumination.