A white light organic electroluminescent device with two layers and two precursors without spacers

An electroluminescent device and parent technology, which is used in the manufacture of electric solid devices, semiconductor devices, semiconductor/solid-state devices, etc. problem, to reduce the interface barrier, stabilize the luminescence spectrum, and achieve the effect of balance

Inactive Publication Date: 2019-01-22
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the spacer layer between the light-emitting layers will also generate additional interface barriers; ② lack of bipolar host materials; since most of the commonly used host materials have unipolar carrier transport characteristics, the electron transport material and hole Transport materials are ...

Method used

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  • A white light organic electroluminescent device with two layers and two precursors without spacers
  • A white light organic electroluminescent device with two layers and two precursors without spacers
  • A white light organic electroluminescent device with two layers and two precursors without spacers

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Effect test

Embodiment 1

[0033] The preparation of organic light-emitting devices can be carried out in a multi-source organic molecular vapor deposition system. The detailed process is as follows:

[0034] [1] The substrate used in the experiment is ITO conductive glass. First, use acetone, absolute ethanol, and deionized water to repeatedly scrub the front and back sides of the ITO glass to remove surface impurities and metal ions.

[0035] [2] Sonicate the wiped ITO substrate with acetone, ethanol, and deionized water for 10 minutes in sequence, and then perform ultraviolet treatment for 10 minutes after drying.

[0036] [3] The treated ITO glass was placed in a multi-source organometallic molecular vapor deposition system in a face-down manner through a glove box. (See Chinese patent: ZL03110977.2, "Pot-increasing evaporation source for organic electroluminescent coating machine"). There are 10 organic evaporation sources and 3 metal electrode evaporation sources in the evaporation table, which c...

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Abstract

The invention discloses a white light organic electroluminescent device with a double-layer double-parent structure without a spacer layer, belonging to the technical field of organic electroluminescent devices. The device consists of a substrate, an anode, a hole transport layer, a luminescent layer, an electronic transport layer and a cathode. Between the hole transport layer and the electron transport layer, there are two dual-parent organic light-emitting layers, and the organic light-emitting dyes are doped in the dual-parent materials in the form of dopants. The dual-parent structure iscomposed of hole transport layer material and electron transport layer material. The doping ratio of hole transport layer material in the luminescent layer near the anode is larger than that in the luminescent layer near the cathode. As that luminescent lay adopts a double-layer double-parent structure without space layer, the interface potential barrier is reduced, the balance transmission of carrier and the uniform distribution of excitons in the luminescent lay are facilitated, and the high-efficiency white light emission with stable spectrum is easily realized.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescent devices, and relates to a white light organic electroluminescent device without a spacer layer and a double-layer double-matrix structure. Background technique [0002] Organic electroluminescent devices (OLEDs) have become a new generation of display products after liquid crystal displays (LCDs), and have huge potential advantages and broad application prospects in solid-state lighting. The advantages of OLED are mainly reflected in thin thickness, light weight, high efficiency, high brightness, bendability, wide viewing angle, low voltage, simple manufacturing process, high temperature controllability, wide source of materials, and no need for backlight. After nearly 30 years of hard work by researchers at home and abroad, OLED has gradually entered the stage of industrialization from the basic research stage, and its development prospects in the lighting field are optimistic ...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54
CPCH10K85/6565H10K85/6572H10K50/121H10K50/13H10K50/11H10K2101/10
Inventor 陈平李啊苏段羽欧世峰程刚
Owner JILIN UNIV
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