# US 2020/0392402 A1 · Luminescent component

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- Number: US 2020/0392402 A1
- Document ID: US20200392402A1
- Status: Published application
- Kind: A1
- Application number: 16/894,144
- Filed: 2020-06-05
- Published: 2020-12-17
- Earliest claimed: 2019-06-17
- Assignees: Avantama AG
- Applicants: Avantama AG
- Inventors: Norman Albert Lüchinger; Lin Fangjian; Tom Mitchell-Williams; Stefan Loher
- Web page: https://patentgrep.com/patent/US20200392402A1

## CPC

- C09K 11/02: Use of particular materials as binders, particle coatings or suspension media therefor
- C01D 13/00: Compounds of sodium or potassium not provided for elsewhere
- C01D 15/00: Lithium compounds
- C01D 17/003: {Compounds of alkali metals}
- C01G 17/00: Compounds of germanium
- C01G 19/00: Compounds of tin
- C01G 21/00: Compounds of lead
- C01G 29/00: Compounds of bismuth
- C01G 30/00: Compounds of antimony
- C09D 5/22: Luminous paints {(luminescent compositions C09K11/00)}
- C09K 11/025: {non-luminescent particle coatings or suspension media}
- C09K 11/06: containing organic luminescent materials
- C09K 11/664: {Halogenides (C09K11/661 takes precedence)}
- F21V 3/12: the coatings comprising photoluminescent substances
- F21V 9/38: Combination of two or more photoluminescent elements of different materials
- G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell}
- H10H 20/8512: {Wavelength conversion materials}
- H10H 20/854: characterised by their material, e.g. epoxy or silicone resins
- H10K 50/125: specially adapted for multicolour light emission, e.g. for emitting white light
- G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light}
- H10H 20/0361: {of wavelength conversion means}
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C01D: COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts of peroxyacids C01B15/00; sulfides C01B17/22; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds other than ammonia and cyanogen, containing nitrogen and other non-metals C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; phosphides C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; cyanides C01C3/08; salts of cyanic acid C01C3/14; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Described are luminescent components with excellent performance and stability. The luminescent components comprise a first element including first luminescent crystals from the class of perovskite crystals, embedded a first polymer P1 and a second element comprising a second solid polymer composition, said second polymer composition optionally comprising second luminescent crystals embedded in a second polymer P2. Polymers P1 and P2 differ and are further specified in the claims. Also described are methods for manufacturing such components and devices comprising such components.

## Claims

### Claim 1

(canceled)

### Claim 2

A luminescent component, comprising a first element and a second element, wherein:
said first element comprises a first solid polymer composition, said first polymer composition comprising first luminescent crystals embedded in a first polymer (P1), wherein
said first luminescent crystals are of the perovskite crystal structure and emit light of a first wavelength in response to excitation by light with a wavelength shorter than the first wavelength,
said first polymer (P1) is selected from the group of polymers with Tg<95° C.;
said second element comprises a second solid polymer composition, said second polymer composition optionally comprising second luminescent crystals embedded in a second polymer (P2), wherein
said optional second luminescent crystals are different from said first luminescent crystals and emit light of a second wavelength in response to excitation by light with a wavelength shorter than the second wavelength,
said second polymer (P2) is selected from the group of crosslinked polymers with Tg>115° C.; and wherein
said second element at least partially covers and thereby seals said first element; and
said Tg is measured according to DIN EN ISO 11357-2: 2014-07 during the second heating cycle and applying a heating rate of 20K/min, starting at −90° C. up to 250° C.

### Claim 3 (depends on 2)

The luminescent component according to claim 2, wherein P1 and/or P2 complies with one or more of the following parameters:
P1 has a molar ratio of the sum of (oxygen+nitrogen+sulphur+phosphorous+fluorine+chlorine+bromine+iodine) to carbon <0.9, preferably <0.4, preferably <0.3, most preferably <0.25;
P2 has a molar ratio of the sum of (oxygen+nitrogen+sulphur+phosphorous+fluorine+chlorine+bromine+iodine) to carbon <0.9, preferably <0.4, preferably <0.3, most preferably <0.20;
WVTR of P1<1 (g*mm)/(m2*day), preferably <0.5 (g*mm)/(m2*day), most preferably <0.2 (g*mm)/(m2*day);
WVTR of P2<1 (g*mm)/(m2*day), preferably <0.5 (g*mm)/(m2*day), most preferably <0.2 (g*mm)/(m2*day);
OTR of P1>1 (cm3*mm)/(m2*day*atm), preferably >5 (cm3*mm)/(m2*day*atm), preferably >25 (cm3*mm)/(m2*day*atm), most preferably >125 (cm3*mm)/(m2*day*atm);
OTR of P2<50 (cm3*mm)/(m2*day*atm), preferably <10 (cm3*mm)/(m2*day*atm), preferably <5 (cm3*mm)/(m2*day*atm), most preferably <1 (cm3*mm)/(m2*day*atm);
light transmittance of P1 and P2>70%, preferably >80%, most preferably >90% at a thickness of 100 μm;
wherein the first polymer (P1) is not dissolvable in the second polymer (P2), and vice versa.

### Claim 4 (depends on 2)

The luminescent component according to claim 2, wherein the first polymer (P1) is selected from the group of acrylate polymers and wherein the second polymer (P2) is preferably selected from the group of acrylate polymers.

### Claim 5 (depends on 2)

The luminescent component according to claim 2, wherein the first polymer (P1) comprises repeating units of formulae (III) and (V) and/or the second polymer (P2) comprises repeating units of formula (VI) and optionally of formula (III):
wherein:
R9 represents H or CH3,
R10 represents a cyclic, linear or branched C1-25 alkyl, or a C6-26 aryl group, each optionally substituted with one or more cyclic, linear or branched C1-20 alkyl, phenyl or phenoxy,
n represents 0 or 1, and
X represents a spacer from the group of alkoxylates comprising 1-8 carbon atoms and 1-4 oxygen atoms;
wherein:
R21 independently from each other represent H or CH3;
R23 represents a cyclic, linear or branched C1-25 alkyl, or a C6-26 aryl group, each optionally substituted with one or more cyclic, linear or branched C1-20 alkyl, phenyl or phenoxy;
X22 independently from each other represent a spacer selected from the group of alkoxylates, whereby both substituents X22 together comprise 8-40 carbon atoms and 2-20 oxygen atoms;
wherein:
R31 independently from each other represent H or CH3;
R33 represents a cyclic C5-25 alkyl, or a C6-26 aryl group, each optionally substituted with one or more cyclic, linear or branched C1-20 alkyl, phenyl or phenoxy;
X32 are independent from each other and are either not present or represent a spacer from the group of alkoxylates, whereby both substituents X32 together comprise 1-8 carbon atoms and 1-8 oxygen atoms.

### Claim 6 (depends on 2)

The luminescent component according to claim 2, wherein the first luminescent crystals are selected from compounds of formula (I):
[M1A1]aM2bXc (I), wherein:
A1 represents one or more organic cations,
M1 represents one or more alkaline metals,
M2 represents one or more metals other than M1,
X represents one or more anions selected from the group consisting of halides, pseudohalides and sulfide,
a represents 1-4,
b represents 1-2,
c represents 3-9, and
wherein either M1, or A1, or M1 and A1 being present;
and/or
wherein said first luminescent crystals are of size between 3-100 nm.

### Claim 7 (depends on 2)

The luminescent component according to claim 2, wherein the second luminescent crystals are selected from one or more of core-shell QDs and micron-sized phosphors.

### Claim 8 (depends on 2)

The luminescent component according to claim 2, further comprising third luminescent crystals selected from one or more of perovskite crystals, core-shell QDs and micron-sized phosphors.

### Claim 9 (depends on 2)

The luminescent component according to claim 2 in the form of a film, particularly a QD backlight film or a down conversion film, said film comprising the following layered structure:
layer of first element-layer of second element; or
layer of second element-layer of first element-layer of second element; or
protecting layer-layer of second element-layer of first element-layer of second element-protecting layer.

### Claim 10 (depends on 9)

The luminescent component according to claim 9 wherein said protecting layer is selected from
glass;
a polymer with humidity barrier properties;
a polymer with oxygen barrier properties;
a polymer coated with an oxide layer (preferably PET coated with SiOx or AlOx.

### Claim 11 (depends on 2)

The luminescent component according to claim 2, wherein
one or more first elements are arranged on a substrate and covered by a layer comprising said second element; or
a layer comprising said first element (1) is arranged on a substrate and coated by a layer comprising said second element.

### Claim 12 (depends on 2)

The luminescent component according to claim 2, wherein
a plurality of first elements are dispersed in a matrix and fully covered by the second element.

### Claim 13 (depends on 2)

A light emitting device, comprising
a luminescent component according to claim 2,
a light source for emitting blue light,
wherein the light source is arranged for exciting the luminescent component.

### Claim 14 (depends on 13)

The light emitting device according to claim 13 selected from the group consisting of
displays, particularly liquid crystal displays, OLED displays, QLED displays, micro LED displays; and
lighting devices, particularly LEDs, OLEDs, QLEDs.

### Claim 15 (depends on 2)

A backlight in a liquid crystal display comprising a luminescent component of claim 2, for emitting white light in response to the luminescent component being radiated by blue light.

### Claim 16 (depends on 2)

Method for manufacturing a luminescent component according to claim 2, comprising the steps of:
—Method A—
providing a substrate which is optionally coated with one or more layers;
applying to said substrate a first liquid polymer composition comprising monomers or oligomers of the first polymer P1, first luminescent crystals, optionally solvent, optionally further materials, optionally third luminescent crystals;
optionally heating said liquid first polymer composition at elevated temperature to remove volatile solvents.
curing said first liquid polymer composition to obtain the first element;
applying to the thus obtained hardened surface of said first element a second liquid polymer composition comprising monomers or oligomers of the second polymer P2, optionally second luminescent crystals, optionally solvent, optionally further materials;
optionally heating said liquid second polymer composition at elevated temperature to remove volatile solvents.
curing said liquid second polymer composition to obtain the second element, which covers and thereby seals said first element;
optionally applying further coating or finishing steps; OR
—Method B—
providing a substrate which is optionally coated with one or more layers;
applying to said substrate a second liquid polymer composition as defined above;
optionally heating said liquid second polymer composition at elevated temperature to remove volatile solvents.
curing said second polymer composition to obtain the second element;
applying to the thus obtained hardened surface of said second element a first liquid polymer composition as defined above;
optionally heating said liquid first polymer composition at elevated temperature to remove volatile solvents.
curing said liquid first polymer composition to obtain the first element, which is covered and thereby sealed by said second element on its lower surface; applying further coating or finishing steps; OR
—Method C—
providing two substrates each coated with a layer of the second element
laminating a layer of first elements with these coated substrates; OR
—Method D—
providing a first liquid polymer composition comprising monomers or oligomers of the first polymer P1, first luminescent crystals, optionally solvent, optionally further materials, optionally third luminescent crystals
one of
a) extracting multiple first elements from the first liquid polymer composition by one of spray-drying, or precipitation, or
b) hardening the first liquid polymer composition into the first solid polymer composition, and crushing the first solid polymer composition resulting in multiple first elements,
mixing the first elements into a second liquid polymer composition as defined above, and
providing a substrate which is optionally coated with one or more layers;
applying to said substrate said second liquid polymer composition containing the first elements;
optionally heating said liquid second polymer composition at elevated temperature to remove volatile solvents.
curing said liquid second polymer composition to obtain the second element,
which covers and thereby seals said first elements;
optionally applying further coating or finishing steps.

### Claim 17 (depends on 5)

The luminescent component according to claim 5 in the form of a film, particularly a QD backlight film or a down conversion film, said film comprising the following layered structure:
layer of first element-layer of second element; or
layer of second element-layer of first element-layer of second element; or
protecting layer-layer of second element-layer of first element-layer of second element-protecting layer.