University of California

Won-Bin Im

Steven P DenBaars

Ram Seshadri

Phosphor compositions comprising a solid solution series between SrAlOF and SrSiOand a solid solution series between SrAlOF and GdSrAlO, are disclosed. A white light emitting LED using the phosphor compositions is also disclosed.

Solid solution phosphors based on oxyfluoride and white light emitting diodes including the phosphors for solid state white lighting applications

A blue-green emitting Ce-activated oxyfluoride phosphor for use with a light emitting diode (LED) in solid state lighting applications. The blue-green emitting Ce-activated oxyfluoride phosphor is represented as:(SrAE)(AlT)OF:Cewherein 0&#x3c;x&#x2266;0.3, 0&#x2266;y&#x2266;1, AE includes at least one element selected from alkaline earth metals on the periodic table, for example, Mg, Ca and Ba, 0&#x2266;z&#x2266;1, and T includes at least one atom selected from Al, B, Ga, and In. The blue-green emitting Ce-activated oxyfluoride phosphor may be combined with another phosphor to generate the white light. Specifically, the present invention provides for white light generation by combining the blue-green emitting Ce-activated oxyfluoride phosphor with either a near-ultraviolet (UV) LED and red emitting phosphor, or with a near-UV LED and a red-yellow phosphor.

Oxyfluoride phosphors and white light emitting diodes including the oxyfluoride phosphor for solid-state lighting applications

A Cebased aluminate phosphor or Cebased phosphor in a solid solution can be used for white light generation when combined with a blue or ultraviolet light emitting diode.

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Goleta, CA, United States of America

Won-Bin Im