Solid polymer composition, a self-supporting film and a light emitting device
AssigneeAvantama AG
InventorNorman Albert Lüchinger
Life of this patent
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Abstract
The invention refers in a first aspect to self-supporting film comprising green luminescent crystals (1), red luminescent crystals (2), and a polymer (3). The green luminescent crystals (1) are perovskite crystals. The red luminescent crystals (2) are zincblende or wurzite, preferably zincblende, crystals. A second aspect of the invention refers to a solid polymer composition (100). A third aspect of the invention refers to a light emitting device comprising either the solid polymer composition (100) or the self-supporting film.
Claims18
A self-supporting film having a thickness of 0.005-10 mm comprising
- green luminescent crystals
- red luminescent crystals, and
- a polymer,
- wherein the green luminescent crystals are perovskite crystals 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 sulfides,
- a represents 1-4,
- b represents 1-2,
- C represents 3-9, and
- wherein either M1, or A1, or M1 and A1 are present;
- wherein the red luminescent crystals are zincblende or wurzite, crystals selected from compounds of formula (II)
- [M3M3′][YY′] (II), wherein:
- M3, M3′ represent Al, Ga, In, and
- Y, Y′ represent N, P, As, Sb, and
- M3′, Y′ may or may not be present,
- or
- M3, M3′ represent Zn, Cd, Be, and
- Y, Y′ represent S, Se, Te, and
- M3′, Y′ may or may not be present, and
- wherein a concentration of M2 is 5-200 mg/m2,
- wherein a concentration of M3+M3′ is 30-250 mg/m2,
- wherein the polymer comprises an acrylate,
- wherein the polymer has a molar ratio of the sum of (oxygen+nitrogen) to carbon z, wherein z≤0.4.
A solid polymer composition, comprising
- green luminescent crystals,
- red luminescent crystals, and
- a polymer,
- wherein the green luminescent crystals are perovskite crystals 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 sulfides,
- a represents 1-4,
- b represents 1-2,
- C represents 3-9, and
- wherein either M1, or A1, or M1 and A1 are present;
- wherein the red luminescent crystals are zincblende or wurzite, crystals selected from compounds of formula (II)
- [M3M3′][YY′] (II), wherein:
- M3, M3′ represent Al, Ga, In, and
- Y, Y′ represent N, P, As, Sb, and
- M3′, Y′ may or may not be present,
- or
- M3, M3′ represent Zn, Cd, Be, and
- Y, Y′ represent S, Se, Te, and
- M3′, Y′ may or may not be present
- and
- wherein the concentration of M2 is 100-1000 ppm.
Dependencies are inferred from the claim text.