Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electrode and organic light emitting diode device employing same

An organic light-emitting layer and electrode technology, applied in the field of organic electroluminescent devices, can solve the problems of shortened service life and device instability, and achieve the effects of better stability, improved device life, and lower driving voltage.

Active Publication Date: 2018-07-13
KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT +1
View PDF10 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, single-layer metal cathodes with low work function, such as Al, Mg, Ca, etc., are easily oxidized in the air, resulting in unstable devices and shortened service life. Therefore, alloys are generally selected as cathodes to avoid this problem.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrode and organic light emitting diode device employing same
  • Electrode and organic light emitting diode device employing same
  • Electrode and organic light emitting diode device employing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides an electrode, such as figure 1 As shown, it includes a first conductive layer 1 and a second conductive layer 2 stacked. The first conductive layer 1 is an Ag layer with a thickness of 16 nm; the second conductive layer 2 is a Yb and Mg alloy layer with a volume ratio of Yb and Mg of 1:1 and a thickness of 2 nm.

[0030] This embodiment also provides an organic electroluminescence device, the device structure is:

[0031] ITO(40nm) / HATCN(10nm) / NPB(110nm) / TCTA(20nm) / CBP(30nm):Ir(ppy) 3 (12%) / BCP(10nm) / Alq 3 (20nm) / Yb(10A):Mg(10A) / Ag(16nm).

[0032] Wherein, the first electrode is an ITO layer;

[0033] The hole injection layer is a HATCN (2,3,6,7,10,11-hexacyano-1,4,5,8,9,12-hexaaza) layer;

[0034] The hole transport layer is an NPB layer;

[0035] The main material layer is a 4,4',4'-tris(carbazol-9-yl)triphenylamine layer;

[0036] The light-emitting layer is Ir(ppy) 3 A doped layer of (three (2-phenylpyridine) iridium (III)) and CBP (...

Embodiment 2

[0043] This embodiment provides an electrode, the structure of which is the same as that of Embodiment 1, the only difference is that the thickness of the second conductive layer is 4 nm.

[0044] This embodiment also provides an organic electroluminescence device, the structure of which is the same as that of Embodiment 1, except that the second electrode is the electrode described in this embodiment.

Embodiment 3

[0046] This embodiment provides an electrode, the structure of which is the same as that of Embodiment 1, except that the thickness of the second conductive layer is 0.5 nm, and the thickness of the first conductive layer is 10 nm.

[0047] This embodiment also provides an organic electroluminescence device, the structure of which is the same as that of Embodiment 1, except that the second electrode is the electrode described in this embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Work functionaaaaaaaaaa
Work functionaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of organic light emitting. An electrode comprises a first conductive layer and a second conductive layer which are arranged in a lamination way, wherein the work function of the first conductive layer is smaller than 4.7eV, the second conductive layer is an alloy layer, and the work function of at least one type of metal in the alloy layer is smaller than 3eV. The composite film layer electrode having gradient work function has excellent stability, and the lifetime of the device can be effectively prolonged; the work function of the at least one type of metalin the alloy layer is smaller than 3eV, and the organic / metal interface barrier can be effectively reduced; and meanwhile, the composite electrode structure having gradient work function can be usedfor gradually reducing electron injection barrier, electron injection is guided in order, and the light-emitting efficiency of the device is improved.

Description

technical field [0001] The invention relates to the field of organic electroluminescence, in particular to an electrode and an organic electroluminescence device using the electrode. Background technique [0002] Organic Light-Emitting Diode (English full name is Organic Light-Emitting Diode, referred to as OLED) is an active light-emitting device. Compared with the thin film transistor liquid crystal display (English full name Liquid Crystal Display, LCD for short) and the plasma display panel (English full name Plasma Display Panel, short PDP) in the existing flat panel display technology, the organic light emitting display device using the organic light emitting diode has high contrast ratio, With the advantages of wide viewing angle, low power consumption, and thinner volume, it is expected to become the mainstream flat panel display technology of the next generation, and it is one of the most concerned technologies in flat panel display technology at present. [0003] ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01L51/52
CPCH10K50/82
Inventor 罗志忠李维维闵超赵菲敖伟
Owner KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products