# US 10,770,691 B2 · Production method of organic EL device

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- Number: US 10,770,691 B2
- Document ID: US10770691B2
- Status: Granted
- Kind: B2
- Application number: 15/564,881
- Filed: 2016-06-09
- Published: 2018-04-12
- Granted: 2020-09-08
- Earliest claimed: 2015-06-15
- Assignees: Sumitomo Chemical Company, Limited
- Applicants: Sumitomo Chemical Company, Limited
- Inventors: Masataka Iwasaki; Takaaki Okamoto
- Web page: https://patentgrep.com/patent/US10770691B2

## CPC

- H10K 71/12: using liquid deposition, e.g. spin coating
- H05B 33/04: Sealing arrangements {, e.g. against humidity}
- H05B 33/10: Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 59/873: {Encapsulations}
- H10K 71/811: {Controlling the atmosphere during processing (H10K71/40 takes precedence)}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

A method for producing an organic EL device having an anode, a cathode, at least one organic functional layer disposed between the anode and the cathode, and a sealing layer, comprising a step of forming the anode, a step of forming the cathode, a step of forming the at least one organic functional layer and a step of forming the sealing layer, wherein the average concentration: A (ppm) of ammonia to which the organic EL device during production is exposed from initiation time of the step of forming the at least one organic functional layer until termination time of the step of forming the sealing layer and the exposure time thereof: B (sec) satisfy the formula (1-1): 0≤A×B≤105 (1-1).

## Claims

### Claim 1

A method for producing an organic EL device having an anode, a cathode, at least one organic functional layer disposed between the anode and the cathode, and a sealing layer, comprising
a step of forming the anode, a step of forming the cathode, a step of forming the at least one organic functional layer and a step of forming the sealing layer,
wherein an average concentration: A (ppm) of ammonia to which the organic EL device during production is exposed from initiation time of the step of forming the at least one organic functional layer until termination time of the step of forming the sealing layer and an exposure time thereof: B (sec) satisfy the formula (1-1):
0≤A×B≤105 (1-1),
wherein the device is a red-light emitting device,
wherein from initiation time of the step of forming the at least one organic functional layer until termination time of the step of forming the sealing layer the organic EL device is under a sealed atmosphere, and
wherein the at least one organic functional layer contains a polymer compound.

### Claim 2 (depends on 1)

The method for producing an organic EL device according to claim 1, wherein A satisfies the formula (2-1):
0≤A<1 (2-1).

### Claim 3 (depends on 1)

The method for producing an organic EL device according to claim 1, wherein B satisfies the formula (3-1):
0≤B≤86400 (3-1).

### Claim 4 (depends on 1)

The method for producing an organic EL device according to claim 1, wherein the step of forming the at least one organic functional layer contains a step of film formation by an application method using a composition containing an organic functional material and an organic solvent.