# US 2019/0245162 A1 · Quantum dot film and applications thereof

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- Number: US 2019/0245162 A1
- Document ID: US20190245162A1
- Status: Published application
- Kind: A1
- Application number: 16/336,802
- Filed: 2017-09-28
- Published: 2019-08-08
- Earliest claimed: 2016-09-28
- Assignees: Sabic Global Technologies B.V.
- Applicants: Sabic Global Technologies B.V.
- Inventors: Chunim LEE; Sunyoung LEE; Seongnam LEE; Jong Woo LEE; Soonyoung HYUN
- Web page: https://patentgrep.com/patent/US20190245162A1

## CPC

- C09K 11/02: Use of particular materials as binders, particle coatings or suspension media therefor
- H10K 50/115: comprising active inorganic nanostructures, e.g. luminescent quantum dots
- H10K 50/844: Encapsulations
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A film for light emitting devices is disclosed. In an aspect, the film is formed from a process comprising: disposing a quantum dot solution on a barrier layer; curing the quantum dot solution to form a quantum dot layer adhered to the barrier layer; disposing a protective solution on the quantum dot layer; and curing the protective solution to form a protective layer adhered to the quantum dot layer, wherein the film comprises a stack of the barrier layer, the quantum dot layer, and the protective layer, and wherein the protective layer inhibits the permeation of at least oxygen and moisture into the quantum dot layer.

## Claims

### Claim 1

A multilayer film comprising:
a barrier layer comprising a substrate and an inorganic layer;
a quantum dot layer disposed on the barrier layer; and
a protective layer disposed on the quantum dot layer, the protective layer comprising a functional layer disposed adjacent one or more of an inorganic layer and a hybrid layer, wherein the hybrid layer comprises an organic component and an inorganic component, wherein the protective layer inhibits permeation of at least oxygen and moisture into the quantum dot layer and wherein the one or more of the inorganic layer and the hybrid layer comprises a polysilazane-based polymer, a polysiloxane-based polymer, or a combination thereof.

### Claim 2 (depends on 1)

The film of claim 1, wherein the protective layer consists essentially of the functional layer disposed adjacent one or more of the inorganic layer and the hybrid layer.

### Claim 3 (depends on 1)

The film of claim 1, wherein the quantum dot layer is disposed at or adjacent the barrier layer using a solution coating process.

### Claim 4 (depends on 1)

The film of claim 1, wherein the functional layer of the protective layer comprises a diffuser.

### Claim 5 (depends on 1)

The film of claim 1, wherein the protective layer comprises the inorganic layer and the inorganic layer comprises a polysilazane-based polymer, a polysiloxane-based polymer, or a combination thereof.

### Claim 6 (depends on 1)

The film of claim 1, wherein the protective layer comprises the hybrid layer and the hybrid layer comprises an organic component and inorganic component.

### Claim 7 (depends on 1)

The film of claim 1, wherein the protective layer is disposed on the quantum dot layer using a solution coating process.

### Claim 8 (depends on 1)

A light emitting device comprising the film of claim 1.

### Claim 9

A method of forming a film for light emitting devices, the method comprising:
disposing a quantum dot solution on a barrier layer;
curing the quantum dot solution to form a quantum dot layer adhered to the barrier layer;
disposing a protective solution on the quantum dot layer; and
curing the protective solution to form a protective layer adhered to the quantum dot layer, wherein the film comprises a stack of the barrier layer, the quantum dot layer, and the protective layer, and wherein the protective layer inhibits permeation of at least oxygen and moisture into the quantum dot layer, and wherein the inorganic layer comprises a polysilazane-based polymer, a polysiloxane-based polymer, or a combination thereof.

### Claim 10 (depends on 9)

The method of claim 9, wherein the protective layer consists essentially of a functional layer disposed adjacent a hybrid layer.

### Claim 11 (depends on 10)

The method of claim 10, wherein the hybrid layer of the protective layer comprises at least polysilazane-based polymer, a polysiloxane-based polymer, or a combination thereof.

### Claim 12 (depends on 9)

The method of claim 9, wherein the barrier layer comprises a polysilazane-based polymer, a polysiloxane-based polymer, or a combination thereof.

### Claim 13 (depends on 9)

The method of claim 9, wherein the quantum dot solution is disposed on the barrier layer using a solution coating process.

### Claim 14 (depends on 9)

The method of claim 9, wherein the protective layer comprises a functional layer.

### Claim 15 (depends on 9)

The method of claim 9, wherein the protective solution is cured using one or more of a radiation curing process and a thermal curing process.

### Claim 16 (depends on 9)

The method of claim 9, wherein the protective solution is disposed on the quantum dot layer using one or more of roll coating, gravure coating, knife coating, dip coating, curtain flow coating, spray coating, bar coating, die coating, spin coating or inkjet coating, by using a dispenser, or a combination thereof.

### Claim 17 (depends on 9)

A light emitting device comprising a film formed according to the method of claim 9.