Title: Recipient luminophoric mediums having narrow spectrum luminescent materials and related semiconductor light emitting devices and methods

Abstract

Light emitting devices include a light emitting diode ("LED") and a recipient luminophoric medium that is configured to down-convert at least some of the light emitted by the LED. In some embodiments, the recipient luminophoric medium includes a first broad-spectrum luminescent material and a narrow-spectrum luminescent material. The broad-spectrum luminescent material may down-convert radiation emitted by the LED to radiation having a peak wavelength in the red color range. The narrow-spectrum luminescent material may also down-convert radiation emitted by the LED into the cyan, green or red color range.

Inventors:

LeToquin, Ronan P; Tong, Tao; Glass, Robert C

Issue Date:

2014-12-30

Research Org.:

Cree, Inc., Durham, NC (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1166752

Patent Number(s):

8921875

Application Number:

13/104,238

Assignee:

Cree, Inc. (Durham, NC)

Patent Classifications (CPCs):

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES

H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05B - ELECTRIC HEATING

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES

H01L2224/48091 - Arched
H01L2224/78301 - Capillary
H01L2224/8592 - Applying permanent coating, e.g. protective coating
H01L25/0753 - {the devices being arranged next to each other}
H01L2924/00014 - the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
H01L2933/0041 - relating to wavelength conversion elements
H01L33/504 - {Elements with two or more wavelength conversion materials}
H01L33/505 - {characterised by the shape, e.g. plate or foil}
H01L33/58 - Optical field-shaping elements
H01L33/62 - Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05B - ELECTRIC HEATING

H05B33/14 - characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source}

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DOE Contract Number:  

FC26-08NT01577

Resource Type:

Patent

Resource Relation:

Patent File Date: 2011 May 10

Country of Publication:

United States

Language:

English

Subject:

42 ENGINEERING