Method for preparing a series of carbazole derivatives and use thereof in organic light-emitting diodes

Patent metadata

Field	Value
Publication number	US-10577325-B2
Application number	US-201715714295-A
Country	US
Kind code	B2
Filing date	Sep 25, 2017
Priority date	Mar 28, 2017
Publication date	Mar 3, 2020
Grant date	Mar 3, 2020

Abstract

Disclosed are a method for preparing a series of carbazole derivatives and use thereof in organic light-emitting diodes. The structure of the material is as shown in Formula I. An organic electroluminescent device prepared by the material can have a significantly improved power efficiency and an external quantum efficiency for the device and an extended life for an orange light or red light device; moreover, the material has characteristics, for example, methods for the synthesis and purification of the material are simple and suitable for large-scale production, and is an ideal choice as a luminescent material for organic electroluminescent devices. The use of the organic electroluminescent diode material as a carrier transport material or as a luminescent material alone or as a host material in a light-emitting layer also falls within the scope of protection.

First claim

The invention claimed is:

1. A compound selected from the group consisting of the following compounds:

2. An organic electroluminescent device comprising a luminescent layer containing a compound of claim 1 .

3. The organic electroluminescent device according to claim 2 , wherein the organic electroluminescent device is composed of a transparent substrate, an anode, a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer and a cathode layer in sequence from the bottom to the top.

4. The organic electroluminescent device according to claim 3 , wherein the material constituting said transparent substrate is glass or a flexible substrate; and the material constituting said anode layer is an inorganic material or an organic electrically conductive polymer; wherein said inorganic material is indium tin oxide, zinc oxide, tin zinc oxide, gold, silver or copper; and said organic electrically conductive polymer is selected from at least one of a polythiophene, sodium polyvinylbenzene sulphonate and a polyaniline.

5. The device according to claim 4 , wherein said hole injection layer contains one or more of the following compounds:

said hole transport layer contains one or more of the following compounds:

the material constituting said organic light-emitting layer further comprises one or more of the following materials:

the material constituting said electron transport layer is Liq, Gaq3, TPBI or Slichem-EL-068, the structures being as follows:

and the material constituting said cathode layer is selected from any one of or an alloy of any two of or a fluoride of the following elements: lithium, magnesium, silver, calcium, strontium, aluminium, indium, copper, gold and silver.

6. The device according to claim 4 , wherein the thickness of said hole injection layer is 30-50 nm;
the thickness of said hole transport layer is 5-15 nm;
the thickness of said organic light-emitting layer is 10-100 nm; the thickness of said electron transport layer is 10-50 nm; and the thickness of said cathode layer is 90-110 nm.

7. The device according to claim 4 , wherein the thickness of said hole injection layer is 40 nm;
the thickness of said hole transport layer is 10 nm;
the thickness of said organic light-emitting layer is 20 nm; the thickness of said electron transport layer is 40 nm; and the thickness of said cathode layer is 100 nm.

Assignees

• Shijiazhuang Chengzhi Yonghua Display Materials Co Ltd

Inventors

• Cao Jianhua
• Wang Shibo
• Hua Ruimao

Classifications

• C07F9/6561

  containing systems of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring or ring system, with or without other non-condensed hetero rings · CPC title

• C07F7/0812

  comprising a heterocyclic ring · CPC title

• C07D487/14

  Ortho-condensed systems · CPC title

• C09K2211/1033

  with oxygen · CPC title

• C07D209/88 Primary

  with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the ring system · CPC title