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Composition for OLED (Organic Light Emitting Diode) and organic electroluminescent device

A composition and electroluminescence technology, applied in the direction of electric solid devices, electrical components, semiconductor devices, etc., can solve the problems of difficulty of OLED devices, large injection barrier, and the potential of device performance cannot be further developed, and achieve the improvement of excitons. The effect of concentration, implantation effect improvement, device efficiency and device life improvement

Pending Publication Date: 2022-04-12
JIANGSU SUNERA TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At this stage, due to the singleness of the electrode material and the limitation of P-type doping materials, in order to form an ohmic contact between the electrode and the hole transport material, the HOMO energy level of the hole transport material is limited to between 5.45 and 5.51eV. As a result, the HOMO of the adjacent hole transport material is also limited, so that the injection barrier between the hole transport material and the host material is still large, and the potential of device performance cannot be further developed.
The potential barrier between adjacent host materials is too large, and it is necessary to reach the space charge limited current region at a higher voltage, that is, it is necessary to obtain a higher current density gain effect at a high voltage. For the preparation of low-voltage, high-efficiency OLEDs Devices have certain difficulties

Method used

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  • Composition for OLED (Organic Light Emitting Diode) and organic electroluminescent device
  • Composition for OLED (Organic Light Emitting Diode) and organic electroluminescent device
  • Composition for OLED (Organic Light Emitting Diode) and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0173] Unless otherwise stated, various materials used in the following examples and comparative examples are commercially available or can be obtained by methods known to those skilled in the art.

[0174] The preparation of the compound represented by formula (1) refers to the synthesis of patents CN109912619A and US20200062778A1;

[0175] Compound C1 mass spectrum data: LC-MS theoretical value is 617.99, measured value is 617.84;

[0176] Compound C3 mass spectrum data: LC-MS theoretical value is 582.01, measured value is 582.15;

[0177] Compound C7 mass spectrum data: LC-MS theoretical value is 749.98, measured value is 749.91;

[0178] Compound C15 mass spectrum data: LC-MS theoretical value is 666.00, measured value is 666.14;

[0179] Compound C12 mass spectrum data: LC-MS theoretical value is 746.02, measured value is 746.11;

[0180] The preparation of the compound shown in formula (2)

[0181] Synthesis of Intermediate 1

[0182]

[0183] In a 250ml three-ne...

Embodiment 1-60

[0245] Follow the method of Device Comparative Example 1-3, the difference is that the hole transport material in step b) is replaced by the compound shown in Table 3, and the P-type dopant material in step b) is replaced by the compound shown in Table 3 Shown compound, the hole transport layer material in step c) is replaced by the compound shown in Table 3.

Embodiment 61-114

[0259] Replace the P-doped material and the hole transport material and the ratio in step b) with the organic materials shown in Table 3 / 4 / 5 respectively, and replace the hole transport materials in step c) with those shown in Table 3 / For the organic materials shown in 4 / 5, replace the electron blocking materials in step d) with the organic materials shown in Table 3 / 4 / 5 respectively.

[0260] table 3

[0261]

[0262]

[0263]

[0264]

[0265] Table 4

[0266]

[0267]

[0268] table 5

[0269]

[0270] After the OLED light-emitting device is prepared as described above, the cathode and anode are connected by a known driving circuit, and various properties of the device are measured. The device performance results of Examples 1-114 and Comparative Examples 1-16 are shown in Table 6 / 7 / 8.

[0271] Table 6

[0272]

[0273]

[0274]

[0275] Table 7

[0276]

[0277]

[0278]Table 8

[0279]

[0280] Note: LT95 refers to the time it...

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Abstract

The invention relates to a composition for an OLED and an organic electroluminescent device.The composition for the OLED at least comprises a P-type doping material and a hole conduction material, the P-type doping material has the structural characteristics shown in the general formula (1), and the hole conduction material is selected from arylamine materials shown in the general formula (2). The invention also relates to an organic electroluminescent device and a panchromatic display device comprising the composition, good ohmic contact can be formed under the condition of low P doping proportion based on the combination of the P doping material and the hole conduction material of a specific structure, and the injection barrier between the hole conduction material and the main body material can be obviously reduced.

Description

technical field [0001] The invention relates to the technical field of semiconductors, more specifically, to a composition for OLEDs, an organic electroluminescent device, and a full-color display device comprising the composition for OLEDs. Background technique [0002] The carriers (holes and electrons) in the organic electroluminescent device are respectively injected into the device from the two electrodes of the device under the drive of the electric field, and meet in the organic light-emitting film layer combination to recombine and emit light. The injection and transport characteristics of the hole injection layer and the hole transport layer used in the existing organic electroluminescent devices are relatively weak, and the reasonable energy level matching of the hole injection layer material and the hole transport layer material is the key to improving the device efficiency and Therefore, improving the injection and transport of holes is of great significance for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54
Inventor 赵鑫栋王芳李崇崔至皓夏传军邝志远
Owner JIANGSU SUNERA TECH CO LTD
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