Charge transport layer and organic photoelectronic element

Patent metadata

Field	Value
Publication number	US-10608183-B2
Application number	US-201916431176-A
Country	US
Kind code	B2
Filing date	Jun 4, 2019
Priority date	Dec 14, 2016
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

A charge transport layer comprising a film containing a fluorinated polymer and a semiconductor material, wherein the film has a material composition such that ΔEth is within a range of from 0.010 to 0.080 MV/cm. An organic photoelectronic element comprising the charge transport layer.

First claim

What is claimed is:

1. A charge transport layer comprising a film containing a fluorinated polymer and a semiconductor material,
wherein the film has a material composition such that ΔE th is within a range of from 0.010 to 0.080 MV/cm,
wherein ΔE th is a value calculated from the formula (ΔE th =E th (A)−E th (B)),
E th (A) is a threshold electric filed when a measurement film is formed only by the semiconductor material in the following HOD;
E th (B) is a threshold electric filed when a measurement film is formed only by the film in the following HOD;
the threshold electric filed is a value of an electric field when a current flows at a current density of 0.0001 time a current density Js (unit: mA/cm 2 ) at which a current flows when an electric field of 0.8 MV/cm is applied to between an ITO electrode and an Al electrode as a standard, in the following HOD; and
HOD is a hole only device comprising only the following layer structure: glass substrate/ITO electrode (100 nm thickness)/MoO 3 (5 nm thickness)/measurement film (100 nm thickness)/Al electrode (100 nm thickness).

2. The charge transport layer according to claim 1 , wherein the film has a fluorination rate (R F-mix ) of from 5 to 45%,
wherein the fluorination rate (R F-mix ) is a product represented by the formula (R F-mix =R F-P ×R P ),
R F-P in the formula is a fluorine atom content (mass %) of the fluorinated polymer contained in the film, and
R P in the formula is a fluorinated polymer content (vol %) in the film.

3. The charge transport layer according to claim 2 , wherein the fluorinated polymer has a fluorine atom content (R F-P ) of from 20 to 77 mass %.

4. The charge transport layer according to claim 2 , wherein the film has a fluorinated polymer content (R P ) of from 20 to 65 vol %.

5. The charge transport layer according to claim 1 , wherein the fluorinated polymer has a refractive index in a wavelength range of from 450 to 800 nm of at most 1.5.

6. The charge transport layer according to claim 1 , wherein the fluorinated polymer is a perfluoropolymer.

7. The charge transport layer according to claim 6 , wherein the perfluoropolymer is a perfluoropolymer having units formed by cyclopolymerization of a cyclopolymerizable perfluorodiene.

8. The charge transport layer according to claim 7 , wherein the perfluorodiene is perfluoro(3-butenyl vinyl ether).

9. An organic photoelectronic element comprising the charge transport layer as defined in claim 1 .

10. The organic photoelectronic element according to claim 9 , wherein the photoelectronic element is an organic EL element.

11. The organic photoelectronic element according to claim 10 , wherein the organic EL element comprises an anode, a cathode provided to face the anode, an emissive layer provided between the anode and the cathode, and the charge transport layer provided on the emissive layer side of the anode.

12. The organic photoelectronic element according to claim 10 , wherein the organic EL element comprises an anode, a cathode provided to face the anode, an emissive layer provided between the anode and the cathode, a hole injection layer provided on the emissive layer side of the anode, and a hole transport layer provided on the emissive layer side of the hole injection layer, and at least one of the hole injection layer and the hole transport layer is the charge transport layer.

Assignees

• Agc Inc
• Univ Yamagata Nat Univ Corp

Inventors

• Abe Takefumi
• Kuwana Yasuhiro
• Hattori Shigeki
• Tsuruoka Kaori
• Yokoyama Daisuke

Classifications

• C09D127/24

  halogenated · CPC title

• G09F9/30

  in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) · CPC title

• H05B33/10

  Apparatus or processes specially adapted to the manufacture of electroluminescent light sources · CPC title

• C08F14/185

  Monomers containing fluorine not covered by the groups C08F14/20 - C08F14/28 · CPC title

• C08F116/12

  by an ether radical · CPC title