# US 2018/0323393 A1 · Organic light-emitting display apparatus

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- Number: US 2018/0323393 A1
- Document ID: US20180323393A1
- Status: Published application
- Kind: A1
- Application number: 15/547,805
- Filed: 2017-06-14
- Published: 2018-11-08
- Earliest claimed: 2017-05-03
- Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd.
- Applicants: Wuha China Star Optoelectronics Technology Co., Ltd.
- Inventors: Jinchang HUANG; Hsianglun HSU
- Web page: https://patentgrep.com/patent/US20180323393A1

## CPC

- H10K 50/155: comprising dopants
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 50/12: comprising dopants
- H10K 50/15: Hole transporting layers
- H10K 50/16: Electron transporting layers
- H10K 50/165: comprising dopants
- H10K 30/865: {Intermediate layers comprising a mixture of materials of the adjoining active layers}
- H10K 50/171: {Electron injection layers}
- H10K 50/181: {Electron blocking layers}
- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 2101/10: Triplet emission
- H10K 2101/20: Delayed fluorescence emission
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

The present invention provides an organic light-emitting display apparatus where an organic light-emitting device comprises an anode layer, a cathode layer, and an organic light-emitting dielectric layer disposed between the anode layer and the cathode layer; organic light-emitting dielectric layer comprises a hole injection layer, a hole transporting layer, a first mixed layer, an emission layer, an electron transporting layer and an electron injection layer sequentially disposed; wherein first mixed layer consists of bipolar host material having function of simultaneously transporting hole and electron, and is doped with either of a material having an electron blocking function and a material having a hole control function. It can decrease injection barrier of carriers of holes and electrons in the organic light-emitting device, control carrier injection rate and position of carrier recombination region, and raise the recombination efficiency of the carriers, thereby achieving a high efficiency, long lifetime organic light-emitting device.

## Claims

### Claim 1

An organic light-emitting display apparatus comprising a substrate, and an organic light-emitting device disposed on the substrate;
said organic light-emitting device comprising an anode layer, a cathode layer, and an organic light-emitting dielectric layer disposed between the anode layer and the cathode layer;
said organic light-emitting dielectric layer comprising a hole injection layer, a hole transporting layer, a first mixed layer, an emission layer, an electron transporting layer, and an electron injection layer, which are sequentially disposed on said anode layer, nearly to a side of the cathode layer; and
said first mixed layer being a mixed material layer consisting of a bipolar host material and a first functional doping material; wherein said bipolar host material is a compound having a function of simultaneously transporting hole and electron; said first functional doping material is a material having an electron blocking function, a material having a hole control function, or both thereof in combination.

### Claim 2 (depends on 1)

Said organic light-emitting display apparatus as claimed in claim 1, wherein said organic light-emitting dielectric layer further comprises a second mixed layer disposed between said emission layer and the electron transporting layer; and said second mixed layer consists of the bipolar host material.

### Claim 3 (depends on 2)

Said organic light-emitting display apparatus as claimed in claim 2, wherein said second mixed layer is a mixed material layer further consisting of a second functional doping material; wherein said second functional doping material is a material having a hole blocking function, a material having an electron control function, or both thereof in combination.

### Claim 4 (depends on 2)

Said organic light-emitting display apparatus as claimed in claim 2, wherein said emission layer is a mixed material layer consisting of the bipolar host material and a luminescent dopant; and
said first mixed layer, the emission layer, and the second mixed layer commonly constitute a mixed layer unit; a thickness of said first mixed layer, a thickness of said second mixed layer do not respectively exceed one-third in a thickness proportion to the entire mixed layer unit.

### Claim 5 (depends on 4)

Said organic light-emitting display apparatus as claimed in claim 4, wherein said luminescent dopant is triplet excited state phosphorescent emission, singlet excited state fluorescence emission, or thermally activated delayed fluorescence emission.

### Claim 6 (depends on 1)

Said organic light-emitting display apparatus as claimed in claim 1, wherein a thickness of said first mixed layer is 10-500 Å, which is doped with the first functional doping material in a weight percent ratio of 1%-50%.

### Claim 7 (depends on 2)

Said organic light-emitting display apparatus as claimed in claim 2, wherein a thickness of said second mixed layer is 10-500 Å.

### Claim 8 (depends on 3)

Said organic light-emitting display apparatus as claimed in claim 3, wherein said second mixed layer is doped with the second functional doping material in a weight percent ratio of 1%-50%.

### Claim 9 (depends on 2)

Said organic light-emitting display apparatus as claimed in claim 2, wherein in said organic light-emitting dielectric layer, the hole injection layer, the hole transporting layer, the first mixed layer, the emission layer, the electron transporting layer, the electron injection layer, and the second mixed layer all are made and formed by a vacuum deposition method, an inkjet printing method, a knife coating method, a spin coating method, or a screen printing method.

### Claim 10 (depends on 1)

Said organic light-emitting display apparatus as claimed in claim 1, wherein said substrate is a TFT substrate;
in said organic light-emitting device, the anode layer, the organic light-emitting dielectric layer, and the cathode layer are sequentially disposed on said substrate from bottom to top; or
in said organic light-emitting device, the cathode layer, the organic light-emitting dielectric layer, and the anode layer are sequentially disposed on said substrate from bottom to top.

### Claim 11

An organic light-emitting display apparatus comprising a substrate, and an organic light-emitting device disposed on the substrate;
said organic light-emitting device comprising an anode layer, a cathode layer, and an organic light-emitting dielectric layer disposed between the anode layer and the cathode layer;
said organic light-emitting dielectric layer comprising a hole injection layer, a hole transporting layer, a first mixed layer, an emission layer, an electron transporting layer, and an electron injection layer, which are sequentially disposed on said anode layer, nearly to a side of the cathode layer; and
said first mixed layer being a mixed material layer consisting of a bipolar host material and a first functional doping material; wherein said bipolar host material is a compound having a function of simultaneously transporting hole and electron; said first functional doping material is a material having an electron blocking function, a material having a hole control function, or both thereof in combination;
wherein a thickness of said first mixed layer is 10-500 Å, which is doped with the first functional doping material in a weight percent ratio of 1%-50%; and
wherein said substrate is a TFT substrate;
in said organic light-emitting device, the anode layer, the organic light-emitting dielectric layer, and the cathode layer are sequentially disposed on said substrate from bottom to top; or
in said organic light-emitting device, the cathode layer, the organic light-emitting dielectric layer, and the anode layer are sequentially disposed on said substrate from bottom to top.

### Claim 12 (depends on 11)

Said organic light-emitting display apparatus as claimed in claim 11, wherein said organic light-emitting dielectric layer further comprises a second mixed layer disposed between said emission layer and the electron transporting layer; and said second mixed layer consists of the bipolar host material.

### Claim 13 (depends on 12)

Said organic light-emitting display apparatus as claimed in claim 12, wherein said second mixed layer is a mixed material layer further consisting of a second functional doping material; wherein said second functional doping material is a material having a hole blocking function, a material having an electron control function, or both thereof in combination.

### Claim 14 (depends on 12)

Said organic light-emitting display apparatus as claimed in claim 12, wherein said emission layer is a mixed material layer consisting of the bipolar host material and a luminescent dopant; and
said first mixed layer, the emission layer, and the second mixed layer commonly constitute a mixed layer unit; a thickness of said first mixed layer, a thickness of said second mixed layer do not respectively exceed one-third in a thickness proportion to the entire mixed layer unit.

### Claim 15 (depends on 14)

Said organic light-emitting display apparatus as claimed in claim 14, wherein said luminescent dopant is triplet excited state phosphorescent emission, singlet excited state fluorescence emission, or thermally activated delayed fluorescence emission.

### Claim 16 (depends on 12)

Said organic light-emitting display apparatus as claimed in claim 12, wherein a thickness of said second mixed layer is 10-500 Å.

### Claim 17 (depends on 13)

Said organic light-emitting display apparatus as claimed in claim 13, wherein said second mixed layer is doped with the second functional doping material in a weight percent ratio of 1%-50%.

### Claim 18 (depends on 12)

Said organic light-emitting display apparatus as claimed in claim 12, wherein in said organic light-emitting dielectric layer, the hole injection layer, the hole transporting layer, the first mixed layer, the emission layer, the electron transporting layer, the electron injection layer and the second mixed layer all are made and formed by a vacuum deposition method, an inkjet printing method, a knife coating method, a spin coating method, or a screen printing method.