System for forming an electroactive layer

• US 10,134,988 B2
• Filed: 12/11/2014
• Issued: 11/20/2018
• Est. Priority Date: 12/13/2013
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Fennimore, Adam, Kondakov, Denis Yurievich, Radu, Nora Sabina
• Primary Examiner(s): Kalam, Abul
• Application Number:
  US15/103,969
• Publication Number:
  US 20160315259A1
• Time in Patent Office: 1,440 Days
• Field of Search: None
• CPC Class Codes: C07C 15/24 containing two rings
• CPC Class Codes: C07F 7/0805 comprising only Si, C or H atoms
• CPC Class Codes: C08G 73/0266 Polyanilines or derivatives thereof
• CPC Class Codes: H10K 50/12 comprising dopants
• CPC Class Codes: H10K 50/15 Hole transporting layers
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/12 using liquid deposition, e.g. spin coating
• 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 85/111 comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
• CPC Class Codes: H10K 85/151 Copolymers
• CPC Class Codes: H10K 85/40 Organosilicon compounds, e.g. TIPS pentacene
• CPC Class Codes: H10K 85/626 containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene

Abstract

There is provided an electroactive system for forming an electroactive layer. The system includes: (a) a first electroactive material; (b) a facilitation additive; and (c) a first liquid medium. The facilitation additive is present during baking in an amount sufficient to enable the electroactive layer made therefrom to effectively resist mixing with a second liquid medium applied thereover after the electroactive system is deposited and baked at a temperature less than 350° C. for a predetermined time.

Claims

1. A composition comprising a mixture of:

(a) a first electroactive material;

(b) a facilitation additive having no crosslinkable groups; and

(c) a first liquid medium;

wherein the facilitation additive is present during baking in an amount sufficient to enable an electroactive layer made from the composition to effectively resist mixing with a second liquid medium applied over the electroactive layer after the composition is deposited onto a workpiece and baked at a temperature less than 350°

C. for a predetermined time;

wherein the facilitation additive has a vapor pressure at 225°

C. that is in a range of 10<sup>−

3</sup> Pa to 40 Pa.

2. The composition of claim 1, wherein the electroactive material comprises at least one photoactive material and at least one host material.

3. The composition of claim 1, wherein the electroactive material comprises hole transport material.

4. The composition of claim 1, wherein the facilitation additive is a small molecule having a molecular weight less than 2000.

5. The composition of claim 1, wherein the facilitation additive has a boiling point of 150°

C. or greater.