KR101524946B1 - White phosphor composition having high color rendering properties, and light emitting diode comprising the same - Google Patents

White phosphor composition having high color rendering properties, and light emitting diode comprising the same Download PDF

Info

Publication number
KR101524946B1
KR101524946B1 KR1020130157649A KR20130157649A KR101524946B1 KR 101524946 B1 KR101524946 B1 KR 101524946B1 KR 1020130157649 A KR1020130157649 A KR 1020130157649A KR 20130157649 A KR20130157649 A KR 20130157649A KR 101524946 B1 KR101524946 B1 KR 101524946B1
Authority
KR
South Korea
Prior art keywords
phosphor
lt
color rendering
light emitting
te
Prior art date
Application number
KR1020130157649A
Other languages
Korean (ko)
Inventor
유정곤
이상준
정몽권
김영식
이환섭
고다현
Original Assignee
주식회사 효성
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 효성 filed Critical 주식회사 효성
Priority to KR1020130157649A priority Critical patent/KR101524946B1/en
Application granted granted Critical
Publication of KR101524946B1 publication Critical patent/KR101524946B1/en

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7774Aluminates; Silicates
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7728Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals comprising europium
    • C09K11/7734Aluminates; Silicates
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L33/00Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50Wavelength conversion elements
    • H01L33/501Wavelength conversion elements characterised by the materials, e.g. binder
    • H01L33/502Wavelength conversion materials
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies
    • Y02B20/16Gas discharge lamps, e.g. fluorescent lamps, high intensity discharge lamps [HID] or molecular radiators
    • Y02B20/18Low pressure and fluorescent lamps
    • Y02B20/181Fluorescent powders

Abstract

The present invention relates to a white phosphor composition having high color rendering properties to which a red phosphor with a wide half-width and a blue-green phosphor are applied, and a white light emitting diode including the same. More specifically, it is a white phosphor composition comprising a red phosphor represented by the following formula (1), a blue green phosphor represented by the following formula (2), and a YAG yellow phosphor. The present invention has a color rendering index of 90 or more and has an extremely high color rendering property.
[Chemical Formula 1]
(Sr 1-x Eu x ) 2 Si 5 TE y N (8 + y) -z O 1/2 * z
TE = Al, Ga, or a group III element containing In, 0 <x? 0.5, 0 <y? 1, 0? Z < Here, when TE is two or more kinds of elements, y is the sum of the respective elements.
(2)
Ba 1-x Eu x Si 2 O 2 N 2
Where 0 < x &lt; = 0.1.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a white light emitting diode having a high color rendering property and a white light emitting diode including the white light emitting diode.

The present invention relates to a white phosphor composition having high color rendering properties to which a red phosphor with a wide half-width and a blue-green phosphor are applied, and a white light emitting diode including the same.

In order to realize a white LED, a method of making a white light emitting device by bonding a Y 3 Al 5 O 12 (YAG) based phosphor to a GaN LED having a short wavelength region such as blue is used.

The above method is a method in which light having a sufficiently high energy emitted from a high-brightness blue LED excites a yellow YAG-based phosphor to emit light in a yellow region, thereby inducing white color by a combination of blue of LED and yellow of phosphor.

In order to realize a white light source from a short-wavelength LED light source, a combination of a high output LED, a phosphor with high luminous efficiency and a good color rendering property should be combined.

However, the white light emitting device manufactured by the conventional YAG-based phosphor has a drawback that the color rendering property is low due to insufficient light emission in the red region, and the color temperature is too high.

That is, the problem of a conventional white light emitting LED device in which a blue light emitting diode and a silicate-based phosphor or YAG yellow phosphor are combined is that red light constituting the white light is insufficient.

Therefore, when a white bladder LED device is used as an illumination device, the color rendering property of reproducing the color of the object more natural is low.

In some cases, the known red phosphors CASN and M 2 Si 5 N 8 can be used to increase the color rendering property, but there is a limit to enhance the color rendering property.

Conventional techniques for enhancing the color rendering property of a white light emitting LED in which a blue light emitting diode and a YAG yellow phosphor are combined can be understood by exemplifying the following Patent Document 1. As a result, all of the contents of Patent Document 1 are incorporated as prior art in this specification.

Patent Document 1 discloses a technique of converting a light emitting wavelength of a GaN-based device that emits light in a blue region to convert a conventional yellow light emitting YAG-type fluorescent substance for realizing white light and a MgO · GeO: Mn 4 + Discloses a technique of providing a white light source having an excellent color rendering index with a lower color temperature than that of a GaN-based white light emitting device using only Y 3 Al 5 O 12 (YAG) yellow light-emitting fluorescent material.

However, the white light emitting technique of Patent Document 1 is a technique for simply reinforcing red light, and the color rendering property is not satisfactory.

KR Patent Registration No. 10-0697794 B1 (Mar. 20, 2007)

The present invention relates to a phosphor composition having excellent color rendering properties by adding a red phosphor having a half-width of 95 nm or more and a blue-green phosphor having a wavelength of 490 to 500 nm to a combination of a blue light emitting diode and a YAG yellow phosphor in order to solve the above- To provide a white light source.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art,

There is provided a white phosphor composition comprising a red phosphor of Formula 1, a blue-green phosphor of Formula 2, and a YAG yellow phosphor.
[Chemical Formula 1]
(Sr 1-x Eu x ) 2 Si 5 TE y N (8 + y) -z O 1/2 * z
TE = Al, Ga, or a group III element containing In, 0 <x? 0.5, 0 <y? 1, 0? Z < Here, when TE is two or more kinds of elements, y is the sum of the respective elements.
(2)
Ba 1-x Eu x Si 2 O 2 N 2

Where 0 < x &lt; = 0.1.

delete

delete

delete

delete

delete

Also provided is a white light emitting diode comprising the phosphor composition of the present invention.

The present invention has a color rendering index of 90 or more and has an extremely high color rendering property.

Fig. 1 is a graph comparing PL spectra of red phosphors of Example 1 and Comparative Example of the present invention (X-axis wavelength (nm), and Y-axis unit is PL intensity and relative intensity).
2 is a PL spectrum of the blue-green phosphors of Example 1 of the present invention (X-axis wavelength (nm), and the Y-axis unit is the relative intensity as a PL intensity).
3 is an LED PKG spectrum (X-axis wavelength (nm) and Y-axis unit is relative intensity as PL intensity) of Examples 1 to 7 and Comparative Example of the present invention.

Hereinafter, the present invention will be described in detail.

One aspect of the present invention is a white phosphor composition comprising a red phosphor of the following formula (1), a blue-green phosphor of the following formula (2), and a YAG yellow phosphor.
[Chemical Formula 1]
(Sr 1-x Eu x ) 2 Si 5 TE y N (8 + y) -z O 1/2 * z
TE = Al, Ga, or a group III element containing In, 0 <x? 0.5, 0 <y? 1, 0? Z < Here, when TE is two or more kinds of elements, y is the sum of the respective elements.

delete

delete

delete

The compound of Formula 1 is a red phosphor having a half-width of 95 nm or more.

(2)
Ba 1-x Eu x Si 2 O 2 N 2

Where 0 < x &lt; = 0.1.

delete

delete

The compound of Formula 2 is a blue-green phosphor having a wavelength of 490 to 500 nm.

The YAG yellow phosphor is conventionally known. That is, the YAG yellow phosphor is a phosphor compound group having Y 3 Al 5 O 12 as a basic structure, and its content is disclosed in detail in US Pat. No. 5,998,925, and it is known to those skilled in the art (Hereinafter referred to as &quot; a person skilled in the art &quot;), the detailed description thereof will be omitted. Accordingly, the entire contents of the above-mentioned U.S. Patent No. 5,998,925 are incorporated herein by reference.

Another aspect of the present invention is a white light emitting diode comprising the phosphor composition of the present invention.

The white light emitting diode may contain only the phosphor composition of the present invention and may be manufactured in any form using a conventional light source manufacturing technique without limitation.

Hereinafter, the present invention will be described in more detail by way of examples. It should be understood that the following examples are for the purpose of illustration only and are not intended to limit the scope of the invention.

Example

Example  1 to 7

The following red phosphors, blue-green phosphors, and yellow phosphors were mixed in the proportions shown in Table 1 below to prepare white phosphor compositions.

Red phosphor: (Sr 0 .96 , Eu 0 .04 ) 2 Si 5 Al 0 .3 Ga 0 .1 N 8 .2 O 0 .1

Blue-green phosphor: Ba 0 .95 Eu 0 .05 Si 2 O 2 N 2

Yellow phosphor: (Y 0 .96 , Ce 0 .04 ) 3 Al 5 O 12

Comparative Example

The following red phosphors and yellow phosphors were mixed at a ratio of 90 wt% and 10 wt%, respectively, to prepare white phosphor compositions.

Red phosphor: (Sr 0 .76, Ca 0 .2, Eu 0 .04) AlSiN 3

Yellow phosphor: (Y 0 .96 , Ce 0 .04 ) 3 Al 5 O 12

Experimental Example

Phosphor PL  Spectrum comparison

Fig. 1 compares PL spectra of the red phosphors of the above-mentioned Examples and Comparative Examples.

As can be seen from FIG. 1, the half-width of the red phosphor of the embodiment of the present invention is larger and the degree of red emission is better.

2 is a PL spectrum of a blue-green phosphor of the present invention example.

3 is an LED PKG spectrum of the embodiment of the present invention.

Color rendering index measurement

The color rendering index was measured for the above Examples and Comparative Examples. The results are shown in Table 1 below.

Phosphor blend ratio LED PKG Green Yellow Red CIE x CIE y Iv lm CRI Comparative Example 90.0% 10.0% 0.3267 0.3667 7.54 20.4 66.7 Example 1 1.1% 94.0% 4.9% 0.3196 0.3539 7.52 20.64 73.2 Example 2 2.3% 92.8% 4.9% 0.3221 0.3542 7.49 20.33 74.8 Example 3 3.6% 91.5% 5.0% 0.3246 0.3545 7.4 20.25 76.5 Example 4 5.0% 90.0% 5.0% 0.3288 0.3547 7.32 20.11 78.4 Example 5 8.2% 86.6% 5.2% 0.3279 0.3545 7.25 19.64 82.3 Example 6 12.2% 82.4% 5.4% 0.3265 0.3546 7.21 19.42 87.4 Example 7 17.1% 77.2% 5.7% 0.3258 0.3551 7.13 19.33 92.9

As can be seen from Table 1, it was confirmed that the color rendering index is much higher than that of the comparative example in which the red phosphor is simply added. This study confirms its applicability to new multimedia media such as white light sources for LCDs and home white lights, which have a low color temperature and a high color rendering index.

Claims (2)

1. A white phosphor composition comprising a red phosphor represented by the following formula (1), a blue green phosphor represented by the following formula (2), and a YAG yellow phosphor.
[Chemical Formula 1]
(Sr 1-x Eu x ) 2 Si 5 TE y N (8 + y) -z O 1/2 * z
TE = Al, Ga, or a group III element containing In, 0 <x? 0.5, 0 <y? 1, 0? Z < Here, when TE is two or more kinds of elements, y is the sum of the respective elements.
(2)
Ba 1-x Eu x Si 2 O 2 N 2
Where 0 < x &lt; = 0.1.
A white light emitting diode comprising the phosphor composition of claim 1.
KR1020130157649A 2013-12-17 2013-12-17 White phosphor composition having high color rendering properties, and light emitting diode comprising the same KR101524946B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130157649A KR101524946B1 (en) 2013-12-17 2013-12-17 White phosphor composition having high color rendering properties, and light emitting diode comprising the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020130157649A KR101524946B1 (en) 2013-12-17 2013-12-17 White phosphor composition having high color rendering properties, and light emitting diode comprising the same
PCT/KR2014/008871 WO2015093719A1 (en) 2013-12-17 2014-09-24 White phosphor composition having high color rendering index and white light emitting diode comprising same

Publications (1)

Publication Number Publication Date
KR101524946B1 true KR101524946B1 (en) 2015-06-02

Family

ID=53403035

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020130157649A KR101524946B1 (en) 2013-12-17 2013-12-17 White phosphor composition having high color rendering properties, and light emitting diode comprising the same

Country Status (2)

Country Link
KR (1) KR101524946B1 (en)
WO (1) WO2015093719A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003021691A1 (en) * 2001-09-03 2003-03-13 Matsushita Electric Industrial Co., Ltd. Semiconductor light emitting device, light emitting apparatus and production method for semiconductor light emitting device
KR20050093047A (en) * 2004-03-18 2005-09-23 주식회사 에이디티 Backlight unit
KR20060000382A (en) * 2004-06-29 2006-01-06 유트로닉스 주식회사 The white-luminescent materials and their synthesis method
KR20070098107A (en) * 2006-03-31 2007-10-05 서울반도체 주식회사 Light emitting device and lcd backlight using the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100449140B1 (en) * 2002-01-24 2004-09-22 서울반도체 주식회사 White Light-emitting Diode and Method of Manufacturing the Same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003021691A1 (en) * 2001-09-03 2003-03-13 Matsushita Electric Industrial Co., Ltd. Semiconductor light emitting device, light emitting apparatus and production method for semiconductor light emitting device
KR20050093047A (en) * 2004-03-18 2005-09-23 주식회사 에이디티 Backlight unit
KR20060000382A (en) * 2004-06-29 2006-01-06 유트로닉스 주식회사 The white-luminescent materials and their synthesis method
KR20070098107A (en) * 2006-03-31 2007-10-05 서울반도체 주식회사 Light emitting device and lcd backlight using the same

Also Published As

Publication number Publication date
WO2015093719A1 (en) 2015-06-25

Similar Documents

Publication Publication Date Title
JP4559496B2 (en) Light emitting device
EP1471775B9 (en) Light source with an arrangement of a luminescent substance and mouldable material with an arrangement of a luminescent substance
JP5419315B2 (en) Illumination unit with at least one LED as light source
EP1574558B1 (en) Phosphor and optical device using same
US8581488B2 (en) White light-emitting semiconductor devices
US8237348B2 (en) Light-emitting device
US7646032B2 (en) White light LED devices with flat spectra
US6685852B2 (en) Phosphor blends for generating white light from near-UV/blue light-emitting devices
US6765237B1 (en) White light emitting device based on UV LED and phosphor blend
JP2009019163A (en) Phosphor particle aggregate for light emitting device, light emitting device, and backlight device for liquid crystal display
KR101131285B1 (en) Luminous substance and light source comprising such a luminous substance
EP2269207B1 (en) Multiple-chip excitation systems for white light emitting diodes (leds)
JP2006520836A (en) Illumination system having radiation source and fluorescent material
CN1993838B (en) Light source with a low colour temperature
JP2011225823A (en) White light emitting device
JP2008160061A (en) Illumination device
JPWO2006135005A1 (en) Light emitting device
KR20070041737A (en) Novel phosphor system for a white light emitting diode
JP2010080935A (en) Semiconductor light emitting device, backlight source using the same, backlight source system, display, and electronic apparatus
EP2172983B1 (en) Light emitting device
KR101226193B1 (en) Temperature-stable oxynitride phosphor and light source comprising a corresponding phosphor material
TWI394818B (en) Illumination system comprising color deficiency compensating luminescent material
EP1964906A1 (en) Yellow light-emitting phosphor and white light-emitting device using same
JP4769132B2 (en) Light emitting device
KR20160019622A (en) Semiconductor light emitting device and semiconductor light emitting device package

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20180411

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20190411

Year of fee payment: 5