Title: Oxycarbonitride phosphors and light emitting devices using the same

Abstract

Disclosed herein is a novel family of oxycarbidonitride phosphor compositions and light emitting devices incorporating the same. Within the sextant system of M--Al--Si--O--N--C--Ln and quintuplet system of M--Si--O--N--C--Ln (M=alkaline earth element, Ln=rare earth element), the phosphors are composed of either one single crystalline phase or two crystalline phases with high chemical and thermal stability. In certain embodiments, the disclosed phosphor of silicon oxycarbidonitrides emits green light at wavelength between 530-550 nm. In further embodiments, the disclosed phosphor compositions emit blue-green to yellow light in a wavelength range of 450-650 nm under near-UV and blue light excitation.

Inventors:

Li, Yuanqiang; Romanelli, Michael Dennis; Tian, Yongchi

Issue Date:

2013-10-08

Research Org.:

Lightscape Materials, Inc. (Princeton, NJ)

Sponsoring Org.:

USDOE Office of Energy Efficiency and Renewable Energy (EERE)

OSTI Identifier:

1107337

Patent Number(s):

8551361

Application Number:

13/046,388

Assignee:

Lightscape Materials, Inc. (Princeton, NJ)

Patent Classifications (CPCs):

C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

F - MECHANICAL ENGINEERING F21 - LIGHTING F21K - NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE

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C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

C09K11/0883 - {Arsenides
C09K11/7705 - {with alkali or alkaline earth metals}
C09K11/7728 - {comprising europium}
C09K11/7731 - {with alkaline earth metals}
C09K11/7733 - {with alkali or alkaline earth metals}

F - MECHANICAL ENGINEERING F21 - LIGHTING F21K - NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE

F21K9/64 - using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

H01J1/63 - characterised by the luminescent material
H01J29/20 - characterised by the luminescent material {

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

H01L33/502 - {Wavelength conversion materials}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

Y02B20/00 - Energy efficient lighting technologies

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DOE Contract Number:  

EE0003245

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY