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Organic light emitting element

An organic light-emitting device and light reflection technology, which is applied to optical components, electrical components, optics, etc., can solve the problems of increasing the power consumption of organic light-emitting devices and reducing the life of organic light-emitting devices, and achieve excellent contrast and reduce reflection.

Inactive Publication Date: 2018-06-08
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this case, the light generated in the organic light-emitting layer is also blocked, and power is increased and used in order to exhibit higher efficiency, so that the power consumption of the organic light-emitting device is increased and the organic light emission is reduced. device lifetime

Method used

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  • Organic light emitting element
  • Organic light emitting element
  • Organic light emitting element

Examples

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Effect test

example 1

[0076] In order to confirm whether electrons are mobile in the organic light-emitting device according to this specification, the use of Alq as the electron transport layer, the use of Al 60 N 35 o 5 An organic light-emitting device was modeled as a light reflection reducing layer as well as using Al as a metal electrode. Modeling was performed by ab initio density functional theory calculations.

[0077] The work function W can be defined as follows.

[0078]

[0079] In the definition of the work function, -e means the amount of electric charge, and Means the electrostatic potential of the vacuum in the peripheral region of the material surface. That is, the work function is the minimum energy required to remove a free electron from a material.

[0080] al 60 N 35 o 5 The Fermi level (EF) of is 0.2025eV, and when by using Al 60 N 35 o 5 The Fermi level (EF) of the work function is calculated by the definition of the work function, Al 60 N 35 o 5 The work fu...

example 2

[0085]In order to confirm whether the charge is mobile in the organic light-emitting device according to this specification, the use of Alq as the electron transport layer, the use of Al 58 N 38 o 4 An organic light-emitting device was modeled as a light reflection reducing layer as well as using Al as a metal electrode.

[0086] Al 58 N 38 o 4 The Fermi level (EF) of -0.1444eV, and when by using Al 60 N 35 o 5 The Fermi level (EF) of the work function is calculated by the definition of the work function, Al 58 N 38 o 4 The work function of is 4.0144eV.

[0087] Image 6 The energy relationship between the various layers according to Example 2 is shown.

[0088] according to Image 6 , the work function of Al is known to be 4.08eV, and Al and Al 58 N 38 o 4 The difference in the work function of 0.0656eV, and the interlayer energy barrier is low, so there is no problem with the movement of charges. Furthermore, it can be seen that from Al 58 N 38 o 4 There ...

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Abstract

The present invention relates to an organic light emitting element comprising: a transparent electrode; a metal electrode disposed opposite to the transparent electrode; one or more organic material layers arranged between the transparent electrode and the metal electrode; and a light reflection reduction layer disposed in contact with the surface of the metal electrode, facing the transparent electrode layer, wherein the light reflection reducing layer comprises an aluminum oxynitride.

Description

technical field [0001] This application claims priority and benefit from Korean Patent Application No. 10-2015-0149503 filed with the Korean Intellectual Property Office on October 27, 2015, the entire contents of which are incorporated herein by reference. [0002] This specification relates to an organic light emitting device. Background technique [0003] The organic light emitting phenomenon refers to a phenomenon in which electrical energy is converted into light energy using an organic material. That is, when an appropriate layer of organic material is located between the anode and cathode, and a voltage is applied between the two electrodes, holes are injected from the anode into the organic material layer and electrons are injected from the cathode into the organic material layer. Excitons are generated when injected holes and electrons meet, and light is generated when the excitons drop to the ground state. [0004] Metal electrodes with high reflectivity used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L27/32
CPCH10K59/805H10K59/80H10K59/8792H10K59/80524H10K50/805H10K50/86H10K59/30H10K50/865H10K59/00G02B5/3025
Inventor 李一翻朴范硕黄智泳金起焕李承宪吴东炫朴赞亨
Owner LG CHEM LTD
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