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A yellow organic electroluminescent device and its preparation method

An electroluminescence and yellow technology, applied in the field of yellow organic electroluminescence devices and their preparation, can solve the problem of high device operating voltage, and achieve the effects of low dependence, high color purity and high spectral stability

Active Publication Date: 2017-07-07
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency degradation of the device has been alleviated to some extent, but the device still has the problem of high operating voltage

Method used

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  • A yellow organic electroluminescent device and its preparation method
  • A yellow organic electroluminescent device and its preparation method
  • A yellow organic electroluminescent device and its preparation method

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preparation example Construction

[0072] The present invention also provides a method for preparing a yellow organic light-emitting device described in the above technical solution, comprising the following steps:

[0073] providing an anode layer on the substrate;

[0074] On the surface of the anode layer, an anode modification layer, a hole transport-electron blocking layer, a hole-dominated light-emitting layer, an electron-dominated light-emitting layer, a hole block-electron transport layer, a cathode modification layer and a cathode layer are sequentially evaporated to obtain a yellow organic Light emitting devices.

[0075] The invention provides a substrate on which an anode layer is arranged. In the present invention, the substrate is consistent with the substrate described in the above technical solution, and will not be repeated here. In the present invention, it is preferable to etch the anode material provided on the substrate, form a plurality of thin strip electrodes on the substrate, and obt...

Embodiment 1

[0093] First, the ITO anode layer on the ITO glass is laser-etched into a strip electrode, and then ultrasonically cleaned with cleaning solution and deionized water for 15 minutes and dried in an oven; then the dried substrate is placed in a pre-treatment vacuum Chamber, under the atmosphere with a vacuum degree of 10Pa, the ITO anode is subjected to low-pressure plasma treatment with a voltage of 400 volts for 3 minutes, and then transferred to the organic evaporation chamber;

[0094] In a vacuum of 1×10 -5 Pa~2×10 -5 In the organic evaporation chamber of Pa, 3nm thick MoO was sequentially evaporated on the ITO layer at a rate of 0.01nm / s 3 Anode modification layer 3; 40nm thick TAPC hole transport-electron blocking layer 4 evaporated at a rate of 0.05nm / s; evaporated at a rate of 0.001nm / s (fbi) 2 Ir(acac) and TcTa were evaporated at a rate of 0.05nm / s to obtain a 10nm thick hole-dominated light-emitting layer 5; FK306 was evaporated at a rate of 0.0001nm / s, and the rate...

Embodiment 2

[0102] First, the ITO anode layer on the ITO glass is laser-etched into strip electrodes, and then ultrasonically cleaned with cleaning solution and deionized water for 15 minutes and dried in an oven. Then put the dried substrate into the pretreatment vacuum chamber, and then transfer the ITO anode to the organic evaporation chamber after a 3-minute low-pressure plasma treatment with a voltage of 400 volts in an atmosphere with a vacuum degree of 10 Pa;

[0103] In a vacuum of 1×10 -5 Pa~2×10 -5 In the organic evaporation chamber of Pa, 3nm thick MoO was sequentially evaporated on the ITO layer at a rate of 0.01nm / s 3 Anode modification layer 3; 40nm thick TAPC hole transport-electron blocking layer 4 evaporated at a rate of 0.05nm / s; evaporated at a rate of 0.001nm / s (fbi) 2 Ir(acac) and mCP were deposited at a rate of 0.05nm / s to obtain a hole-dominated light-emitting layer 5 with a thickness of 10nm; FK306 was deposited at a rate of 0.0001nm / s and evaporated at a rate of...

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Abstract

The invention provides a yellow organic electroluminescent device, comprising a substrate, an anode layer, an anode modification layer, a hole transport-electron blocking layer, a hole-dominated light-emitting layer, an electron-dominated light-emitting layer, a hole-blocker- An electron transport layer, a cathode modification layer and a cathode layer; the electron-dominated light-emitting layer includes the following components: 0.05wt% to 2.0wt% of an organic sensitizing material, and the organic sensitizing material is a transition metal complex with energy level matching material; 0.5wt%-6.0wt% yellow organic luminescent material; the rest is electronic organic host material. In the present invention, the organic sensitizing material can act as a carrier deep binding center and an energy transfer ladder, which is beneficial to balance the distribution of carriers, broaden the light-emitting range of the device, and accelerate the transition from the host material to the light-emitting material. energy transfer, thereby reducing the working voltage of the light-emitting device and improving the efficiency and color purity of the device.

Description

technical field [0001] The invention relates to the technical field of electroluminescence, in particular to a yellow organic electroluminescence device and a preparation method thereof. Background technique [0002] An organic electroluminescent device is a self-luminous device that generates light when charges are injected into an organic film between a hole injection electrode (anode) and an electron injection electrode (cathode), and the electrons and holes combine and then annihilate . Organic electroluminescent devices have the characteristics of low voltage, high brightness, wide viewing angle, etc., so organic electroluminescent devices have been developed rapidly in recent years. Among them, yellow organic electroluminescent devices have become a research hotspot due to their application prospects in signal display and white light modulation. [0003] For a long time, trivalent iridium complexes have been regarded as ideal organic electroluminescent materials by a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K85/146H10K85/342H10K50/00H10K50/121H10K50/80H10K71/00
Inventor 周亮张洪杰崔荣朕
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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