# US 8,785,916 B2 · Optoelectronic organic component and method for the production thereof

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- Number: US 8,785,916 B2
- Document ID: US8785916B2
- Status: Granted
- Kind: B2
- Application number: 13/499,608
- Filed: 2010-09-29
- Published: 2012-09-27
- Granted: 2014-07-22
- Earliest claimed: 2009-09-30
- Assignees: OSRAM Opto Semiconductors GmbH
- Applicants: Marc Philippens; Ralph Paetzold; Wiebke Sarfert; David Hartmann; Arvid Hunze; Ralf Krause
- Inventors: Marc Philippens; Ralph Paetzold; Wiebke Sarfert; David Hartmann; Arvid Hunze; Ralf Krause
- Web page: https://patentgrep.com/patent/US8785916B2

## CPC

- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 50/17: Carrier injection layers
- H10K 50/81: Anodes
- H10K 50/82: Cathodes
- H10K 85/111: {comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene}
- H10K 85/113: {Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene}
- H10K 85/1135: {Polyethylene dioxythiophene [PEDOT]; Derivatives thereof}
- H10K 85/146: {poly N-vinylcarbazol; Derivatives thereof}
- H10K 85/631: {Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine}
- H10K 2101/30: Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values
- H10K 2101/40: Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

Optoelectronic organic component, comprising: a first electrode, a first planarization layer which is disposed on the first electrode, a first injection layer which is disposed on the planarization layer, an organic functional layer which is disposed on the injection layer, a second electrode which is disposed on the organic functional layer, wherein in the case that the first electrode is an anode, the following applies for the energy levels: EF−EHOMO,Inj.≦−EHOMO,Plan. and EF−EHOMO,Inj<EHOMO,Funk. or in the case that the first electrode is a cathode, the following applies for the energy levels: ELUMO,Inj.−EF≦ELUMO,Plan.−EF and ELUMO,Inj.−EF<ELUMO,Funk.−EF, wherein EF is the fermi energy, EHOMO is the energy of the highest occupied energy level of the respective layer and ELUMO is the energy of the lowest unoccupied energy level of the respective layer.

## Claims

### Claim 1

An optoelectronic organic component, comprising:
a first electrode,
a first planarization layer which is disposed on the first electrode,
a first injection layer which is disposed on the planarization layer,
an organic functional layer which is disposed on the injection layer,
a second electrode which is disposed on the organic functional layer,
wherein in the case that the first electrode is an anode, the following applies for the energy levels:
EF−EHOMO,Inj.≦EF−EHOMO,Plan. and EF−EHOMO,Inj.<EF−EHOMO,Funk. or
in the case that the first electrode is a cathode, the following applies for the energy levels:
ELUMO,Inj.−EF≦ELUMO,Plan.−EF and ELUMO,Inj.−EF<ELUMO,Funk.−EF,
wherein EF is the fermi energy, EHOMO is the energy of the highest occupied energy level of the respective layer and ELUMO is the energy of the lowest unoccupied energy level of the respective layer.

### Claim 2 (depends on 1)

The optoelectronic organic component as claimed in claim 1, wherein in the case that the first electrode is an anode, the following applies for the energy levels:
EF−EHOMO,Plan.<EF−EHOMO,Funk. or
in the case that the first electrode is a cathode, the following applies for the energy levels:
ELUMO,Funk.−EF<ELUMO,Plan.−EF.

### Claim 3 (depends on 1)

The optoelectronic organic component as claimed in claim 1,
wherein the charge carriers emitted by the first electrode are accumulated in the first injection layer.

### Claim 4 (depends on 3)

The optoelectronic organic component as claimed in claim 3, wherein the charge carriers which are accumulated in the first injection layer are injected into the subsequent layer.

### Claim 5 (depends on 1)

The optoelectronic organic component as claimed in claim 1,
the following condition applies for the resistances R of the first planarization layer (RPlan.) and the first injection layer (RInj.), and for the boundary surface resistance through contact between the first planarization layer and the first injection layer (RKontakt,Inj.) and the boundary surface resistance through contact between the first injection layer and the organic functional layer (RKontakt,Funk.):
RPlan.+RKontakt,Inj.≦RInj.+RKontakt,Funk..

### Claim 6 (depends on 1)

The optoelectronic organic component as claimed in claim 1, wherein the first injection layer has a layer thickness of 1 to 20 nm.

### Claim 7 (depends on 1)

The optoelectronic organic component as claimed in claim 1, wherein the first injection layer is doped.

### Claim 8 (depends on 7)

The optoelectronic organic component as claimed in claim 7, wherein the dopant is selected from: MoO2, MoO3, WO3, ReO3, Re2O7, V2O5.

### Claim 9 (depends on 1)

The optoelectronic organic component as claimed in claim 1, wherein the first injection layer comprises a substance selected from:
4,4′,4″-tris(N-(1-naphthyl)-N-phenyl-amino)triphenylamine, phthalocyanine-copper complex, 4,4′,4″-tris(N-3-methylphenyl-N-phenyl-amino)triphenylamine, N,N′-bis (naphthalene-1-yl)-N,N′-bis(phenyl)-benzidine, 2,2′,7,7′-tetrakis(N,N-diphenylamine)-9,9′-spirobifluorene, di-[4-(N,N-ditolyl-amino)-phenyl]cyclohexane, N,N′-bis(3-methylphenyl)-N,N′-bis(phenyl)-benzidine.

### Claim 10 (depends on 1)

The optoelectronic organic component as claimed in claim 1,
wherein the first injection layer comprises a substance selected from:
PEDOT:PSS, poly(9-vinylcarbazole), poly(N,N′-bis(4 butylphenyl)-N,N′-bis(phenyl)-benzidine, poly(3-hexylthiophene), polyaniline.

### Claim 11 (depends on 1)

The optoelectronic organic component as claimed in claim 1,
wherein the first planarization layer (2) comprises a substance selected from:
PEDOT:PSS, PEDOT-based materials, poly(9-vinylcarbazole), poly(N,N′-bis(4-butylphenyl)-N,N′-bis(phenyl)-benzidine, poly(3-hexylthiophene), polyaniline.

### Claim 12 (depends on 1)

The optoelectronic organic component as claimed in claim 1, additionally comprising:
a second planarization layer which is disposed between the second electrode and the organic functional layer,
a second injection layer which is disposed between the second planarization layer and the organic functional layer.

### Claim 13 (depends on 1)

The optoelectronic organic component as claimed in claim 1, which is formed as an electroluminescent component.

### Claim 14

A method for the production of an optoelectronic organic component, comprising the method steps of:
A) providing a first electrode,
B) applying a first planarization layer to the first electrode,
C) applying a first injection layer to the first planarization layer,
D) applying an organic functional layer to the first injection layer,
E) applying a second electrode to the organic functional layer,
wherein in the case that the first electrode is an anode the following applies for the energy levels:
EF−EHOMO,Inj.≦EF−EHOMO,Plan. and EF−EHOMO,Inj.<EF−EHOMO,Funk. or
in the case that the first electrode is a cathode, the following applies for the energy levels:
ELUMO,Inj.−EF≦ELUMO,Plan.−EF and ELUMO,Inj.−EF<ELUMO,Funk.−EF,
wherein EF is the fermi energy, EHOMO is the energy of the highest occupied energy level of the respective layer and ELUMO is the energy of the lowest unoccupied energy level of the respective layer.

### Claim 15 (depends on 14)

The method as claimed in claim 14, wherein the first injection layer is applied in method step C) by means of a wet-chemical process.

### Claim 16

An optoelectronic organic component, comprising:
a first electrode;
a first planarization layer which is disposed on the first electrode;
a first injection layer which is disposed on the first planarization layer;
an organic functional layer which is disposed on the first injection layer;
a second electrode which is disposed on the organic functional layer;
a second planarization layer which is disposed between the second electrode and the organic functional layer,
a second injection layer which is disposed between the second planarization layer and the organic functional layer,
wherein the first electrode is an anode with the following energy levels:
EF−EHOMO,Inj.≦EF−EHOMO,Plan. and EF−EHOMO,Inj.<EF−EHOMO,Funk. and
the second electrode is a cathode with the following energy levels:
ELUMO,Inj.−EF≦ELUMO,Plan.−EF and ELUMO,Inj.−EF<ELUMO,Funk.−EF,
wherein EF is the fermi energy, EHOMO is the energy of the highest occupied energy level of the respective layer and ELUMO is the energy of the lowest unoccupied energy level of the respective layer.