US 12,092,845 B2
Color conversion film comprising inorganic separation layer
Norman Albert Lüchinger, Meilen (CH); Deniss Sabani, Greifensee (CH); Fangjian Lin, Zürich (CH); and Sacha Bissig, Bürglen (CH)
Assigned to Avantama AG, Stäfa (CH)
Filed by Avantama AG, Stäfa (CH)
Filed on Apr. 4, 2023, as Appl. No. 18/295,303.
Claims priority of application No. 22179215 (EP), filed on Jun. 15, 2022.
Prior Publication US 2023/0408742 A1, Dec. 21, 2023
Int. Cl. G02F 1/1335 (2006.01); C09K 11/02 (2006.01); C09K 11/06 (2006.01); C09K 11/08 (2006.01); G02B 1/04 (2006.01); G02B 1/14 (2015.01); G02B 5/20 (2006.01)
CPC G02B 5/206 (2013.01) [C09K 11/02 (2013.01); C09K 11/06 (2013.01); C09K 11/0883 (2013.01); G02B 1/04 (2013.01); G02B 1/14 (2015.01); G02B 2207/101 (2013.01); G02F 1/133514 (2013.01)] 20 Claims
 
1. A laminated structure comprising a multitude of layers, whereby, upon excitation by blue light, emits green and red light; the structure comprising a multitude of laminated layers whereby,
one layer is a green photoluminescent light emitting polymer layer comprising green emitting perovskite crystals; and
one layer is a red photoluminescent light emitting polymer layer comprising red emitting core-shell quantum dots comprising Indium and/or Cadmium; and
whereby the red light emitting polymer layer and the green light emitting polymer layer is separated by one or more separating layers;
wherein the green light emitting polymer layer and the red light emitting polymer layer cover the whole area of the color conversion film;
characterized in that at least one of said separating layers
consists of inorganic material; and
is a continuous layer and has a thickness of 1 nm to 10 micrometers; and
covers the whole area of the laminated structure;
wherein one or more non-emissive polymer layers are located between the red light emitting layer and the separating layer; and/or
wherein one or more non-emissive polymer layers are located between the green light emitting layer and the separating layer.