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Organic light-emitting device using spirobifluorene ring compound

A technology for organic light-emitting elements and cyclic compounds, which is applied in electrical components, semiconductor devices, and electro-solid devices, etc., can solve the problems that the luminous efficiency and driving voltage of organic light-emitting elements cannot meet the application requirements of displays, and achieve the effect of improving the performance of components.

Active Publication Date: 2020-07-28
E RAY OPTOELECTRONICS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] US7714145 discloses that the use of spirobifluorene ring compounds in organic light-emitting devices can be an effective hole transport layer, but when using different materials for the light-emitting layer, the luminous efficiency and driving voltage of the organic light-emitting device cannot meet the requirements of actual displays. The application requirements, especially for automotive displays, the organic materials used in organic light-emitting elements need to have good thermal stability to maintain the components in terms of luminous chromaticity, current efficiency, external quantum efficiency, luminous efficiency and service life. Require

Method used

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  • Organic light-emitting device using spirobifluorene ring compound
  • Organic light-emitting device using spirobifluorene ring compound
  • Organic light-emitting device using spirobifluorene ring compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Embodiment 1: Manufacture of organic light-emitting element

[0091] Before the substrate is loaded into the evaporation system for use, the substrate is cleaned with solvent and ultraviolet ozone for degreasing. Afterwards, the substrate is transferred to a vacuum deposition chamber where all layers are deposited on top of the substrate. according to image 3 The layers shown were deposited by a heated evaporation boat (boat) at about 10 -6 The vacuum degree of Torr is deposited sequentially:

[0092] a) Indium tin oxide layer (ITO), thickness

[0093] b) first hole assisting layer, thickness Comprising compound 1-2 doped with 2% by volume of P-type dopant compound;

[0094] c) Second hole assisting layer, thickness Compound 1-2;

[0095] d) The third hole assisting layer, thickness HT2;

[0096] e) Luminescent layer, thickness Contains a main illuminant EB doped with a 4% volume ratio guest illuminant BD (BD and EB are trade names of Taiwan Yulei Optoe...

Embodiment 2 to 3

[0105] Examples 2 to 3: Manufacture of organic light-emitting elements

[0106] Example 2 and Example 3 are as in Example 1, except that the compounds 1-2 in the first hole-assisting layer and the second hole-assisting layer in Example 1 are replaced by compounds 1-5 and 1-6 respectively. layer structure.

Embodiment 4 to 5

[0115] Examples 4 to 5: Manufacture of organic light-emitting elements

[0116] Except that the EB:BD of the light-emitting layer in Example 3 were replaced by EPH doped with 3% volume ratio of PEG and EPH doped with 2% volume ratio of PER, respectively, Example 4 and Example 5.

[0117] Wherein, the host emitter EPH and the guest emitters PEG and PER doped with 3% iridium metal complex are trade names of Taiwan Yulei Optoelectronics Technology Co., Ltd.

[0118] The structure of the organic light-emitting element in Example 4 can be expressed as: ITO (1350 angstroms) / compound 1-6: P-type doping compound (200 angstroms) / compound 1-6 (1200 angstroms) / HT2 (100 angstroms) / EPH :PEG (300 Å) / ET:Liq (250 Å) / LiF (5 Å) / Al (1500 Å). The organic light-emitting element of Example 4 emits green light.

[0119] The structure of the organic light-emitting element in Example 5 can be expressed as: ITO (1350 angstroms) / compound 1-6: P-type doping compound (200 angstroms) / compound 1-6 (1400 a...

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Abstract

An organic light-emitting element using a spirobifluorene ring compound, comprising: an anode; at least two hole-assisting layers sequentially formed on the anode; a light-emitting layer formed on the at least two hole-assisting layers; at least one An electron assisting layer formed on the light-emitting layer; and a cathode formed on the electron transport layer, wherein at least one of the at least two hole assisting layers contains a spirobifluorene ring compound of formula (I) , and the hole assisting layer formed on the anode has a P-type doping compound or a compound of formula (II), so as to improve the performance of the organic light-emitting element, wherein, G 1 and G 2 as defined in the specification.

Description

technical field [0001] The invention relates to an organic light-emitting element, in particular to an organic light-emitting element using a spirobifluorene ring compound. Background technique [0002] Organic light-emitting devices (OLEDs) are widely used in full-color displays or portable electronic devices because of their lightness, thinness, wide viewing angle, high contrast, low power consumption, high response speed, full-color screen, and flexibility. All highly anticipated. [0003] A typical OLED is a multi-layer film structure formed by sequentially depositing an anode, a hole transport layer, a light emitting layer, an electron transport layer and a cathode by vacuum deposition or coating. When a current is applied, the anode injects holes and the cathode injects electrons into the one or more organic layers, and the injected holes and electrons each migrate to opposite charged electrodes. When electrons and holes are confined to the same molecule, an "exciton...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/54
CPCH10K85/00H10K50/15
Inventor 朱常莹陈晖旭陈唯圣林祺臻张敏忠
Owner E RAY OPTOELECTRONICS TECH