Class of green/yellow emitting phosphors based on benzoxanthene derivatives for LED lighting

Patent metadata

Field	Value
Publication number	US-9969932-B2
Application number	US-201414771666-A
Country	US
Kind code	B2
Filing date	Feb 14, 2014
Priority date	Mar 1, 2013
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

The invention provides a lighting device ( 1 ) comprising (a) a light source ( 10 ) configured to generate light source light ( 11 ), and (b) a light converter ( 100 ) configured to convert at least part of the light source light ( 11 ) into visible converter light ( 111 ), wherein the light converter ( 100 ) comprises a matrix ( 120 ) containing an organic luminescent material ( 140 ) of the benzoxanthene derivative type. The lighting device may further comprise a further luminescent material ( 130 ).

First claim

The invention claimed is:

1. A lighting device comprising (a) a light source configured to generate light source light, and (b) a light converter configured to convert at least part of the light source light into visible converter light, wherein the light converter comprises a matrix containing an organic luminescent material as defined by formula (I):

with G 1 as defined above, in which A, B, C, J, Q are independently selected from hydrogen, halogen, R 1 , OR 2 , NHR 7 , and NR 2 R 7 , wherein R 1 is independently selected from C 2 -C 18 alkyl, C 6 -C 24 aryl, and C 6 -C 24 heteroaryl; and wherein R 2 and R 7 are independently selected from C 1 -C 18 alkyl, C 6 -C 24 aryl, and C 6 -C 24 heteroaryl;
in which G 2 -G 9 are independently selected from hydrogen, halogen, R 3 , OR 3 , NHR 3 , and NR 4 R 3 , wherein R 3 and R 4 are independently selected from C 1 -C 18 alkyl, C 6 -C 24 aryl, and C 6 -C 24 heteroaryl; and
wherein one or more of A, B, C, J, and Q independently comprise isopropyl or tertbutyl and wherein G 8 does not include an amine group.

2. The lighting device according to claim 1 , wherein two of A, B, and C are independently selected from the group consisting of isopropyl and tertutyl.

3. The lighting device according to claim 2 , wherein one or both of G 3 and G 4 are independently selected from R 3 and OR 3 , wherein R 3 ═Y, with Y being defined according to the following structure:

with D, E, I, L and M independently being selected from hydrogen, halogen, R 5 , OR 5 , NHR 5 , and NR 6 R 5 , wherein R 5 and R 6 are independently selected from C 1 -C 18 alkyl, C 6 -C 24 aryl, and C 6 -C 24 heteroaryl.

4. A lighting device comprising (a) a light source configured to generate light source light, and (b) a light converter configured to convert at least part of the light source light into visible converter light, wherein the light converter comprises a matrix containing an organic luminescent material as defined by formula (I):

with G 1 as defined above, in which A, B, C, J, Q are independently selected from hydrogen, halogen, R 1 , OR 2 , NHR 7 , and NR 2 R 7 , wherein R 1 is independently selected from C 2 -C 18 alkyl, C 6 -C 24 aryl, and C 6 -C 24 heteroaryl; and wherein R 2 and R 7 are independently selected from C 1 -C 18 alkyl, C 6 -C 24 aryl, and C 6 -C 24 heteroaryl;
in which G 2 -G 9 are independently selected from hydrogen, halogen, R 3 , OR 3 , NHR 3 , and NR 4 R 3 , wherein R 3 and R 4 are independently selected from C 1 -C 18 alkyl, C 6 -C 24 aryl, and C 6 -C 24 heteroaryl; and
wherein one or more of A, B, C, J, and Q independently comprise isopropyl or tertbutyl, and wherein either (i) A and C are isopropyl, wherein G 2 , G 5 , G 7 -G 9 , B, J and Q are hydrogen, or wherein (ii) B and C are tertbutyl, wherein G 2 , G 5 , G 7 -G 9 , A, J and Q are hydrogen.

5. The lighting device according to claim 4 , wherein one or both of G 3 and G 4 are independently selected from R 3 and OR 3 , wherein R 3 ═Y, with Y being defined according to the following structure:

with D, E, I, L and M being hydrogen.

6. The lighting device according to claim 1 , wherein one or more of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 are available, one or more of these are independently selected from the group consisting of (i) C n H 2n +1Om, with n being an integer from 1 to 18 and with 0≤m≤n/2, (ii) -C n H 2n+1 - mFm with n being an integer from 1 to 18 and with 0≤m≤2n+1, (iii) C 6 -C 24 aryl comprising one or more ether groups, (iv) C 6 -C 24 aryl comprising one or more fluor substituents, (v) C 6 -C 24 heteroaryl comprising one or more ether groups, and (vi) C 6 -C 24 heteroaryl comprising one or more fluor substituents.

7. A lighting device comprising (a) a light source configured to generate light source light, and (b) a light converter configured to convert at least part of the light source light into visible converter light, wherein the light converter comprises a matrix containing an organic luminescent material as defined by formula (I):

with G 1 as defined above, in which A, B, C, J, Q are independently selected from hydrogen, halogen, R 1 , OR 2 , NHR 7 , and NR 2 R 7 , wherein R 1 is independently selected from C 2 -C 18 alkyl, C 6 -C 24 aryl, and C 6 -C 24 heteroaryl; and wherein R 2 and R 7 are independently selected from C 1 -C 18 alkyl, C 6 -C 24 aryl, and C 6 -C 24 heteroaryl;
in which G 2 -G 9 are independently selected from hydrogen, halogen, R 3 , OR 3 , NHR 3 , and NR 4 R 3 , wherein R 3 and R 4 are independently selected from C 1 -C 18 alkyl, C 6 -C 24 aryl, and C 6 -C 24 heteroaryl; and
wherein one or more of A, B, C, J, and Q independently comprise isopropyl or tertbutyl, and wherein the lighting device further comprises a further luminescent material configured to provide red light, wherein the further luminescent material comprises an organic luminescent material as defined by formula (II):

in which:
G 1 and G 6 independently comprise a group selected from a linear alkyl, a branched alkyl, an oxygen-containing alkyl, a cycloalkyl, a naphtyl, and Y;
wherein each of A, B, C, J and Q independently comprise a group selected from hydrogen, fluorine, chlorine, isopropyl, t-butyl, methoxy, an alkyl with up to 16 carbon atoms, and an oxygen containing alkyl with up to 16 carbon atoms;
G 2 , G 3 , G 4 and G 5 independently comprise a group selected from hydrogen, fluorine, chorine, isopropyl, t-butyl, methoxy, alkyl with up to 16 carbon atoms, and oxygen-containing alkyl with up to 16 carbon atoms, and X;
wherein each of D, E, I, L and M independently comprise a group selected from hydrogen, fluorine, chlorine, isopropyl, t-butyl, methoxy, alkyl with up to 16 carbon atoms, and an oxygen-containing alkyl with up to 16 carbon atoms;
and in which at least two selected from G 2 , G 3 , G 4 , and G 5 at least comprise X, wherein independently at least one of D, E, I, L and M of at least two of said at least two selected from G 2 , G 3 , G 4 , and G 5 comprise a group selected from fluorine and chlorine, especially fluorine.

8. The lighting device according to claim 1 , wherein the light source is configured to provide blue light, wherein the lighting device further comprises a further luminescent material configured to provide red light, wherein the further luminescent material comprises a luminescent material selected from the group consisting of (Ba,Sr,Ca)S:Eu, (Mg,Sr,Ca)AlSiN 3 :Eu, (Ba,Sr,Ca) 2 Si 5 N 8 :Eu and a quantum dot based luminescent material.

9. The lighting device according to claim 1 , wherein the matrix comprises an aromatic polyester or a copolymer thereof.

10. The lighting device according to claim 1 , wherein one or more of G 1 , G 2 , G 3 , G 4 , G 5 , G 6 , G 7 , G 8 and G 9 , comprise a covalent link with the matrix.

11. A light converter comprising a matrix containing an organic luminescent material as defined by formula (I):

with G 1 as defined above, in which A, B, C, J, Q ar

Assignees

• Philips Lighting Holding Bv

Inventors

• Lub Johan
• Hikmet Rifat Ata Mustafa
• Veldman Dirk

Classifications

• C09K2211/1044

  containing two nitrogen atoms as heteroatoms · CPC title

• F21K9/64

  using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer · CPC title

• C09B67/0033

  Blends of pigments; Mixtured crystals; Solid solutions · CPC title

• C09B5/62

  Cyclic imides or amidines of peri-dicarboxylic acids of the anthracene, benzanthrene, or perylene series · CPC title

• H01L51/0053

  Electricity · mapped topic