Organic light-emitting element

A technology of organic light-emitting elements and light-emitting layers, which is applied in the direction of organic semiconductor devices, electrical components, and light-emitting materials. It can solve problems such as difficulty in finding organic materials and difficulties, and achieve the effects of improving performance, reducing element driving voltage, and improving luminous efficiency.

Active Publication Date: 2017-02-01
E RAY OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the manufacturing process of actual displays, it is still difficult to find organic materials that can meet the above requirements
For example, it is still difficult to increase the lifetime of organic light-emitting elements that emit blue light while maintaining the performance of the elements

Method used

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  • Organic light-emitting element
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1 Fabrication of Fluorescent Organic Light-Emitting Elements

[0054] 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. Each layer is deposited by a heated evaporation boat in about 10 -6 The vacuum degree of Torr is deposited sequentially:

[0055] a) Indium tin oxide layer (ITO), thickness

[0056] b) first hole assisting layer, thickness HI;

[0057] c) Second hole assisting layer, thickness A compound of formula (Ia);

[0058] d) The third hole assisting layer, thickness HT2 compounds;

[0059] e) Luminescent layer, thickness Contains the main illuminant EPH and 4% by weight of the guest illuminant BD doped therein, (BD and EPH are the trade names of China Taiwan Yulei Optoelectronics Technology Co., Ltd.);

[0060] f) Elect...

Embodiment 2

[0072] Example 2 Manufacture of phosphorescence-emitting organic light-emitting element

[0073] 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. Each layer is deposited by a heated evaporation boat in about 10 -6 The vacuum degree of Torr is deposited sequentially:

[0074] a) Indium tin oxide layer (ITO), thickness

[0075] b) first hole assisting layer, thickness HI;

[0076] c) Second hole assisting layer, thickness comprising a compound of formula (Ia) doped with 3% by weight of HI;

[0077] d) The third hole assisting layer, thickness HT2 compounds;

[0078] e) Luminescent layer, thickness Containing the main illuminant EPH and the guest illuminant PEG doped therein with 6% by weight of iridium metal complex (PEG and EPH are the trade na...

Embodiment 3 and 4

[0083] Examples 3 and 4 Manufacture of phosphorescence-emitting organic light-emitting elements

[0084] The organic light-emitting element of Example 3 was fabricated in the same manner as Example 2, with the difference that only the compound of formula (Ia) was used as the compound of the second hole assisting layer in Example 3.

[0085] The device structure of Example 3 can be represented as: ITO / HI / (Ia) / HT2 / PEG:EPH / Liq:ET / LiF / Al.

[0086] The manufacture of the organic light-emitting element in Example 4 is carried out in the same manner as in Example 2, with the difference that Example 4 does not have a third hole-assisting layer, and the thickness of the second hole-assisting layer is

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PUM

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Abstract

An organic light-emitting element is provided, including: an anode; a first hole assisting layer and a second hole assisting layer sequentially formed on the anode; a light-emitting layer formed on and in contact with the second hole assisting layer, the light-emitting layer including a host luminesce containing a compound having a carbazole group; at least one electron transport layer formed on the light-emitting layer; and a cathode formed on the electron transport layer, the second hole assisting layer including a hole transport compound represented by formula (I) to improve the performance of the organic light-emitting element.

Description

technical field [0001] The invention relates to an organic light-emitting element, in particular to an organic light-emitting element with improved element performance. Background technique [0002] In recent years, organic light-emitting devices (OLEDs) have attracted attention due to their properties such as high brightness, fast refresh rate, and wide color gamut, which make OLEDs more suitable for applications in portable electronic devices. [0003] Generally, an organic light-emitting device includes an anode, a hole transport layer, a light-emitting layer, an electron transport layer and a cathode deposited sequentially by vacuum deposition or coating. When the organic light-emitting element is turned on with a voltage, the anode injects holes, and the cathode injects electrons into the organic layer(s). The injected holes enter the light emitting layer through the hole transport layer, and the electrons migrate into the light emitting layer through the electron tran...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54
CPCH10K85/60H10K85/6572H10K50/156H10K50/82H10K50/816C09K11/06C09K2211/1007C09K2211/1014H10K85/631H10K85/626H10K85/633H10K85/657H10K50/12H10K50/11H10K50/15H10K2102/103H10K50/81H10K85/342H10K85/636H10K2101/10H10K2102/00
Inventor 黄贺隆如曼·班卢玄龙
Owner E RAY OPTOELECTRONICS TECH
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