US 2024/0357849 A1 · FILM PATTERNING METHOD AND ELECTROLUMINESCENT DEVICE AND DISPLAY DEVICE INCLUDING A PATTERNED FILM

Abstract

A method of manufacturing a patterned film includes forming a first film including a semiconductor nanoparticle and an additive, wherein the additive includes a polythiol compound, the semiconductor nanoparticle includes an organic ligand (for example, on a surface thereof), and the organic ligand includes a first functional group bonded to the surface of the semiconductor nanoparticle and a carbon-carbon unsaturated bond; exposing a portion of the first film to a radiation to cause a change in a solubility of the semiconductor nanoparticle in the exposed area with respect to a first solvent; contacting the radiation treated film with the first solvent to remove at least a portion of an unexposed area of the radiation treated film to obtain a patterned film. A light emitting device includes such a patterned film as a light emitting layer.

Claims20

Dependent claims

A method of producing a patterned film having a first region configured to emit a first light, the method comprising:

forming a first film comprising a semiconductor nanoparticle and an additive, wherein the additive includes a polythiol compound containing at least two thiol groups, and the semiconductor nanoparticle is configured to emit the first light, the semiconductor nanoparticle comprises an organic ligand, and the organic ligand comprises a first functional group bonded to a surface of the semiconductor nanoparticle and a carbon-carbon unsaturated bond;
exposing a portion of the first film corresponding to the first region to a radiation to cause a change in a solubility of the semiconductor nanoparticle in an exposed area with respect to a first solvent to form a radiation treated film;
and
contacting the radiation treated film with the first solvent to remove at least a portion of an unexposed area of the radiation treated film to obtain a patterned film having the first region.

1 more element

An electroluminescent device comprising:

a first electrode and a second electrode, and
a light emitting layer between the first electrode and the second electrode, and a hole transport layer between the light emitting layer and the first electrode,
wherein the light emitting layer comprises a patterned film including a first region configured to emit a first light, wherein the first region is disposed corresponding to a first pixel of the electroluminescent device,
wherein the first region of the patterned film comprises a semiconductor nanoparticle and a carbon-sulfur bond containing moiety,
wherein the semiconductor nanoparticle is configured to emit the first light and exhibits a dissolution resistance to a first solvent,
wherein the first solvent comprises toluene, octane, hexane, chlorobenzene, dichlorobenzene, chloroform, xylene, or a combination thereof, and
wherein the hole transport layer comprises a hole transport material and does not include the semiconductor nanoparticle.

4 more elements

Dependencies are inferred from the claim text.

Film patterning method and electroluminescent device and display device including a patterned film

Life of this patent

Film patterning method and electroluminescent device and display device including a patterned film

Life of this patent

Abstract

Claims20