# US 2014/0153247 A1 · Wavelength converting element

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- Number: US 2014/0153247 A1
- Document ID: US20140153247A1
- Status: Published application
- Kind: A1
- Application number: 14/131,939
- Filed: 2012-06-29
- Published: 2014-06-05
- Earliest claimed: 2011-07-13
- Assignees: Koninklijke Philips N.V.
- Inventors: Johan Lub; Rifat Ata Mustafa Hikmet; Rene Theodorus Wegh
- Web page: https://patentgrep.com/patent/US20140153247A1

## CPC

- H05B 33/14: 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}
- C09K 11/06: containing organic luminescent materials
- F21V 9/08: for producing coloured light, e.g. monochromatic; for reducing intensity of light (with provision for controlling the colour F21V9/40)
- F21V 9/32: characterised by the arrangement of the photoluminescent material
- H05B 33/20: characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
- H10K 99/00: Subject matter not provided for in other groups of this subclass
- C09K 2211/1011: Condensed systems
- C09K 2211/1466: containing nitrogen as the only heteroatom
- F21K 9/64: using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
- H10K 85/621: {Aromatic anhydride or imide compounds, e.g. perylene tetra-carboxylic dianhydride or perylene tetracarboxylic di-imide}
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR

## Abstract

A wavelength converting element (110) comprising a polymeric material having a polymeric backbone, the polymeric material comprising a wavelength converting moiety, wherein the wavelength converting moiety is adapted to convert light of a first wavelength to light of a second wavelength, and wherein the wavelength converting moiety is covalently attached to the polymer backbone and/or covalently incorporated into the polymer backbone. The stability and lifetime of wavelength converting molecules comprised in a polymeric material may be improved by covalently attaching the wavelength converting moieties to the polymeric material.

## Claims

### Claim 1

A wavelength converting element comprising a polymeric material having a polymeric backbone, said polymeric material comprising a wavelength converting moiety, wherein said wavelength converting moiety is adapted to convert light of a first wavelength to light of a second wavelength, and wherein said wavelength converting moiety is covalently attached to said polymer backbone, wherein said polymeric material having a polymeric backbone comprises a random polyester copolymer comprising said wavelength converting moiety, said random polyester copolymer comprising at least three different repeating units of the following general formula n1, n2, n3, n4:
wherein said repeating units are randomly distributed along the length of said polymeric backbone,
wherein AA is selected from the following first group of aromatic moieties:
wherein BB is selected from the following: —(CH2)2—, —(CH2)4— or
wherein CC and DD are said wavelength converting moieties having one of the following general formula I, II, or III:
in which
G1 is a linear or branched alkyl group or oxygen-containing alkyl group
CnH2n+1Om, n being an integer from to 44 and m<n/2, or Y, or a linking group;
each of A and C independently is hydrogen, isopropyl, t-butyl,
fluorine, methoxy, or unsubstituted saturated alkyl CnH2n+1, n being an integer from 1 to 16;
each of B, J and Q independently is hydrogen, isopropyl, t-butyl, fluorine, methoxy, or unsubstituted saturated alkyl CnH2n+1, n being an integer from 1 to 16, or a linking group;
each of G2, G3, G4 and G5 independently is hydrogen, fluorine, methoxy, or
unsubstituted saturated alkyl group CnH2n+1, n being an integer from 1 to 16, or X, or OX, wherein D, M, E, L and I are hydrogen, or a linking group;
each of G2 and G3 may independently be C1 to C12, preferably C1 to C6, linear, branched or cyclic alkoxy group, optionally bonded via the oxygen;
each of D and M independently is hydrogen, fluorine, methoxy, or unsubstituted saturated alkyl group CnH2n+1, n being an integer from 1 to 16;
each of E, I and L independently is hydrogen, fluorine, methoxy, or unsubstituted saturated alkyl group CnH2n+1, n being an integer from 1 to 16, or a linking group;
and each of T, T′, R, R′ independently is hydrogen, isopropyl, t-butyl, fluorine, alkyloxy, aryloxy, cyano CO2RxOCORx or unsubstituted saturated alkyl CnH2n+1, n being an integer from 1 to 16 and Rx being aryl or saturated alkyl CnH2n+1, n being an integer from 1 to 16, or a linking group;
and wherein each wavelength converting moiety comprises two linking groups at any two of the positions: G1, G2, G3, G4, G5, E, L, B, J, Q, T, T′, R, R′, said linking groups providing covalent attachment of said wavelength converting moiety to the ester and/or alcohol functionalities of said polymer backbone;
and wherein said random polyester copolymer comprises either a mixture of said repeating units n1, n2, n3 and n4 or a mixture of said repeating units n1, n2 and n4, said repeating units are randomly distributed along the length of said polymeric backbone, and the total number of the repeating units of the general formula n1 and n2 is larger than the total number of repeating units of the general formula n2 and n4.

### Claim 2 (depends on 1)

The wavelength converting element according to claim 1, wherein said random polyester copolymer comprises a mixture of said repeating units: n1, n3 and n4, said repeating units are randomly distributed along the length of said polymeric backbone, and the total number of repeating units of formula n1 and n3 is larger than the total number of repeating units of formula n4 in the polymeric backbone.

### Claim 3 (depends on 1)

The wavelength converting element according to claim 1, wherein said random polyester copolymer comprises a mixture of said repeating units: n1, n2 and n4, said repeating units are randomly distributed along the length of the polymeric backbone, and the total number of repeating units of formula n1 is larger than the total number of repeating units of formula n2 and n4 in the polymeric backbone.

### Claim 4 (depends on 1)

The wavelength converting element according to claim 1, wherein AA is the following aromatic moiety:

### Claim 5

A wavelength converting element comprising a polymeric material having a polymeric backbone, said polymeric material comprising a wavelength converting moiety, wherein said wavelength converting moiety is adapted to convert light of a first wavelength to light of a second wavelength, and wherein said wavelength converting moiety is covalently attached to said polymer backbone, wherein said polymeric material having a polymeric backbone comprises a random polyolefine copolymer comprising said wavelength converting moiety, said random polyolefine copolymer comprising at least two different repeating units of the following general formula m1 and m2:
in which
X1 independently is hydrogen, fluorine, chlorine, methyl or ethyl; X2 independently is hydrogen, methyl, hydroxide, acetate, nitrile, C6H5 or CO2 CnH2n+1, n being 0 or an integer from to 6; and X3 is said wavelength converting moiety having one of the following general formula I and II:
in which
G1 is a linear or branched alkyl group or oxygen-containing alkyl group
CnH2n+1Om, n being an integer from to 44 and m<n/2, or Y, or a linking group;
each of A and C independently is hydrogen, isopropyl, t-butyl,
fluorine, met oxy, unsubstituted saturated alkyl CnH2n+1, n being an integer from 1 to 16;
each of B, J and Q independently is hydrogen, isopropyl, t-butyl,
fluorine, methoxy, or unsubstituted saturated alkyl CnH2n+1, n being an integer from 1 to 16, or a linking group;
each of G2, G3, G4 and G5 independently is hydrogen, fluorine, methoxy, or
unsubstituted saturated alkyl group CnH2n+1, n being an integer from 1 to 16, or X, or a linking group;
each of D and M independently is hydrogen, fluorine, methoxy, or unsubstituted saturated alkyl group CnH2n+1, n being an integer from 1 to 16;
each of E, and L independently is hydrogen, fluorine, methoxy, or unsubstituted saturated alkyl group CnH2n+1, n being an integer from 1 to 16, or a linking group;
and each of T, T′, R, R′ independently is hydrogen, isopropyl, t-butyl,
fluorine, alkyloxy, aryloxy, cyano CO2RxOCORx or unsubstituted saturated alkyl CnH2n+1, n being an integer from 1 to 16 and Rx being aryl or saturated alkyl CnH2n+1, n being an integer from 1 to 16, or a linking group;
wherein said repeating unit are randomly distributed throughout the length of the random copolymer, the number of repeating units of formula m1 is larger than the number of repeating units of formula m2 in the polymeric backbone;
and wherein each wavelength converting moiety comprises one linking group at one of the positions: G1, B, J, or Q, said linking group comprises at least one of: —CH2—, —O—, or —CO2—, thereby providing a covalent attachment of said wavelength converting moiety to the polymer backbone of said polyolefine.

### Claim 6 (depends on 5)

The wavelength converting element according to claim 5, wherein said random polyolefine copolymer comprises said at least two different repeating units of the said general formula m1 and m2, wherein X1 independently is hydrogen, chlorine, methyl; X2 independently is C6H5 or CO2 CnH2n+1, n being 0 or an integer from 1 to 6, or nitrile, and X3 is said wavelength converting moiety wherein said linking group comprises —CO2— for covalent attachment of said wavelength converting moiety to the polymer backbone of said polyolefine.

### Claim 7

(canceled)

### Claim 8 (depends on 1)

The wavelength converting element according to claim 1, wherein the polymeric material comprises a random polyester or random polyolefine copolymer, comprising first repeating units selected from the general formula n1, n2, n3 and n4, or m1 and m2, wherein the first repeating units of the general formula n2, n4 or m2 comprise a first wavelength converting moiety of one of the general formula I or II, and comprising a second repeating units selected from the general formula n1, n2, n3, and n4, or m1 and m2, wherein the second repeating units of the general formula n2, n4 or m2 comprise a second wavelength converting moiety of one of the general formula I or II, wherein the first and second wavelength converting moieties are different.

### Claim 9 (depends on 1)

The wavelength converting element according to claim 1, wherein said random polyester copolymer comprising different repeating units of said general formula n1 and n4, wherein
AA is
and
wherein said wavelength converting moiety having said general formula I, wherein G1 is Y and G2, G3, G4, G5 are phenol, and wherein A and C are isopropyl, B and Q are hydrogen, and J is a propylene linking group.

### Claim 10 (depends on 5)

The wavelength converting element according to claim 5, wherein said random polyolefine copolymer comprising said two different repeating units of said general formula m1 and m2, wherein X1 is methyl; X2 is acetate; and X3 is said wavelength converting element having said general formula II, wherein G1 is Y and G2, G3, G4, G5 are hydrogen, T is nitrile, R is hydrogen, and wherein A and C are isopropyl, B and Q are hydrogen, and J is a —(CH2)3OCO— linking group.

### Claim 11 (depends on 1)

The wavelength converting element to claim 1, wherein the content of said wavelength converting moiety in said polymeric material is 10% or less by weight, such as 1% or less by weight.

### Claim 12 (depends on 1)

The wavelength converting element according to claim 1, wherein said wavelength converting moiety is derived from a perylene.

### Claim 13 (depends on 1)

A light-emitting device comprising a light-source adapted to emit light of a first wavelength, and a wavelength converting element according to claim 1, wherein said wavelength converting element is arranged to receive light of said first wavelength and adapted to convert at least part of the light of said first wavelength to light of a second wavelength.