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Cerium and europium doped phosphor compositions and light emitting devices including the same

A technology of luminescent materials and light-emitting devices, which is applied in the direction of luminescent materials, electric solid-state devices, semiconductor devices, etc., and can solve problems such as unnatural colors

Inactive Publication Date: 2009-06-10
CREE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, the object may appear to have an unnatural color when viewed under such a light source

Method used

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  • Cerium and europium doped phosphor compositions and light emitting devices including the same
  • Cerium and europium doped phosphor compositions and light emitting devices including the same
  • Cerium and europium doped phosphor compositions and light emitting devices including the same

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Embodiment Construction

[0018] The invention will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. However, this invention should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the thickness of layers and regions are exaggerated for clarity. Like reference numerals refer to like elements throughout. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0019] The terminology used herein is for the purpose of describing particular embodiments only and is not meant to be limiting of the invention. As used herein, "a", "an", and "the" in the singular are meant to include the plural unless the content clearly indicates otherwise. It will be further underst...

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Abstract

The invention relates to cerium and europium doped phosphor compositions and light emitting devices including the same .Compounds of formula I, which include both cerium and europium, may be useful as phosphors in solid state light emitting devices. Light emitting devices including such phosphors may emit warm white light.

Description

[0001] related application [0001] This application requires a U.S. provisional patent titled "CERIUM ANDEUROPIUM DOPED PHOSPHOR COMPOSITIONS AND LIGHT EMITTING DEVICES INCLUDING THE SAME (cerium and europium-doped phosphor composition and light-emitting device containing it)" filed on November 14, 2007 Benefit and priority of Application No. 60 / 987817, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to phosphor materials and light emitting devices comprising the same. More specifically, the present invention relates to phosphors useful in light emitting devices for producing warm white light. Background technique [0003] Light emitting diodes and laser diodes are well known solid state light emitting elements that produce light when sufficient voltage is applied. Light emitting diodes and laser diodes may be generally referred to as light emitting devices ("LEDs"). LEDs typically includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80H01L33/00H01L33/50
CPCC09K11/7721C09K11/0883C09K11/7792H01L33/502Y02B20/181C09K11/7734H01L2924/181H01L2224/32245H01L2224/48091H01L2224/48247H01L2224/73265H01L2224/8592Y02B20/00C09K11/77928C09K11/77218C09K11/77348H01L2924/00012H01L2924/00014H01L2924/00
Inventor R·P·勒托奎因
Owner CREE INC