ELECTRONIC DEVICE INCLUDING A GUEST MATERIAL WITHIN A LAYER AND A PROCESS FOR FORMING THE SAME

• US 20070278501A1
• Filed: 08/17/2007
• Published: 12/06/2007
• Est. Priority Date: 12/30/2004
• Status: Active Grant

• Current Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Yu, Gang, Stainer, Matthew, Srdanov, Gordana, MacPherson, Charles
• Granted Patent: US 7,420,205 B2
• Time in Patent Office: Days
• US Class Current: 257/86
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/135 using ink-jet printing
• CPC Class Codes: H10K 71/15 characterised by the solvent used
• CPC Class Codes: H10K 71/40 Thermal treatment, e.g. annealing in the presence of a solvent vapour
• CPC Class Codes: H10K 85/1135 Polyethylene dioxythiophene [PEDOT]; Derivatives thereof
• CPC Class Codes: H10K 85/115 Polyfluorene; Derivatives thereof
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene

Abstract

An electronic device made by a process that includes forming a first layer over a substrate and placing a first liquid composition over a first portion of the first layer. The first liquid composition includes at least a first guest material and a first liquid medium. The first liquid composition comes in contact with the first layer and a substantial amount of the first guest material intermixes with the first layer. An electronic device includes a substrate and a continuous first layer overlying the substrate. The continuous layer includes a first portion in which an electronic component lies and a second portion where no electronic component lies. The first portion is at least 30 nm thick and includes a first guest material, and the second portion is no more than 40 nm thick.

Claims

1. An electronic device formed by a process comprising:

forming a first layer over a substrate; and

placing a first liquid composition over a first portion of the first layer, wherein the first liquid composition comprises at least a first guest material and a first liquid medium, wherein the first liquid composition comes in contact with the first layer and a substantial amount of the first guest material intermixes with the first layer to form an intermixed region where said contact occurs, wherein the intermixed region is thicker than the first layer as originally formed at the same location as the intermixed region, wherein;

the first layer is (1) capable of emitting radiation having an emission maximum at a targeted wavelength or within a targeted spectrum of wavelengths or (2) designed to respond to radiation at the targeted wavelength or within the targeted spectrum of wavelengths, wherein the targeted spectrum has a width no greater than 150 nm; and

the first guest material is (1) capable of emitting radiation having an emission maximum at the targeted wavelength or a targeted spectrum of wavelengths or (2) designed to respond to radiation at the targeted wavelength or within the targeted spectrum of wavelengths.

2. An electronic device of claim 1, wherein the first guest material within the first layer is part of a radiation-emitting electronic component or a radiation-responsive electronic component.

3. An electronic device of claim 1, the process further comprising:

placing a second liquid composition over a second portion of the first layer, wherein the second liquid composition comprises at least a second guest material and a second liquid medium, wherein the second liquid composition comes in contact with the first layer and a substantial amount of the second guest material intermixes with the first layer to form an intermixed region where said contact occurs, wherein the intermixed region is thicker than the first layer as originally formed at the same location as the intermixed region;

the second guest material is (1) capable of emitting radiation having an emission maximum at the targeted wavelength or a targeted spectrum of wavelengths or (2) designed to respond to radiation at the targeted wavelength or within the targeted spectrum of wavelengths;

and the first and second guest materials comprise different materials.

4. An electronic device of claim 1 wherein the first layer comprises a material capable of emitting blue light.

5. An electronic device of claim 1 wherein placing the first liquid composition over a first portion of the first layer is performed using a precision deposition technique.

6. An electronic device comprising:

a substrate;

a continuous first layer overlying the substrate, wherein;

the continuous layer comprises a first portion in which an electronic component lies and a second portion where no electronic component lies;

the first portion is at least 30 nm thick and includes a first guest material; and

the second portion is no more than 40 nm thick.

7. An electronic device of claim 6, wherein:

the continuous first layer includes additional first portions;

the electronic device includes first electronic components;

each of the first electronic components comprises a first electrode, a second electrode, and at least one of the first portions lying between the first and second electrodes.

8. An electronic device of claim 7, wherein:

the continuous first layer includes third portions and fourth portions;

the third portions are at least 30 nm thick and include a second guest material;

the fourth portions are at least 30 nm thick and include a third guest material;

the electronic device includes second electronic components and third electronic components;

each of the second electronic components comprises a third electrode, a fourth electrode, and at least one of the second portions lying between the third and fourth electrodes.

each of the third electronic components comprises a fifth electrode, a sixth electrode, and at least one of the third portions lying between the fifth and sixth electrodes.

9. An electronic device of claim 8, wherein the first electronic component is a radiation-emitting electronic component or a radiation-responsive electronic component.

10. An electronic device of claim 6, wherein:

the continuous first layer is (1) capable of emitting radiation having an emission maximum at a targeted wavelength or within a targeted spectrum of wavelengths or (2) designed to respond to radiation at the targeted wavelength or within the targeted spectrum of wavelengths, wherein the targeted spectrum has a width no greater than 150 nm; and

the first guest material is (1) capable of emitting radiation having an emission maximum at the targeted wavelength or a targeted spectrum of wavelengths or (2) designed to respond to radiation at the targeted wavelength or within the targeted spectrum of wavelengths.

11. An electronic device of claim 10, wherein each of the continuous first layer and the first guest material has an emission maximum within a blue light spectrum.