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Triarylamine derivative and organic electroluminescent device thereof
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A derivative, triarylamine technology, applied in the field of triarylamine derivatives and their organic electroluminescent devices, can solve the problems of poor film formation, low hole mobility, low luminous efficiency and low service life of light-emitting devices, etc.
Active Publication Date: 2021-09-14
CHANGCHUN HYPERIONS TECH CO LTD
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[0006] The Chinese patent application number 201711089080.2 describes a class of compounds used as hole transport layer materials. However, this type of structure has problems such as easy crystallization, poor film-forming properties, and low hole mobility, which lead to organic electroluminescence devices. The luminous efficiency and service life are low, so it is urgent to develop hole transport materials with good film-forming properties and stability
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[0151] Preparation and characterization of compounds
[0152] Description of raw materials, reagents, and characterization equipment:
[0252] Test conditions: the test atmosphere is nitrogen, the flow rate of nitrogen is 50mL / min; the heating rate is 10°C / min, and the temperature range is 50-350°C. The glass ...
Embodiment 49
[0257] [Example 49] Test of material film-forming property:
[0258] Compound 17 of the present invention, compound 115, compound 146, compound 153, compound 354 and comparative compound 1 were vapor-deposited on ITO glass substrates to prepare samples with a thickness of 10 nm. The compounds of the present invention 17 and 115 were characterized by atomic force microscopy. , compound 146, compound 153, compound 354 and the thin film morphology of compound 1. The film morphology of each sample is as follows: figure 1 The obtained surface roughness values are shown in Table 3:
[0261] According to the results in Table 3, it can be seen that the compounds of the present invention have steric properties, the ...
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Abstract
The invention provides a triarylamine derivative and an organic electroluminescent device thereof, and relates to the technical field of organic electroluminescence. The triarylamine derivative provided by the invention has relatively high triplet stateenergy level, high hole mobility, high refractive index and good film-forming property and thermal stability, and when the triarylamine derivative is applied to the organic electroluminescent device, the driving voltage of the organic electroluminescent device can be effectively reduced, the luminous efficiency can be improved, the service life of the device can be prolonged, and the triarylamine derivative disclosed by the invention has a good application effect and industrialization prospect in organic electroluminescent devices.
Description
technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to a triarylamine derivative and an organic electroluminescence device thereof. Background technique [0002] Organic Light-Emitting Diode (OLED) refers to the phenomenon that organic semiconductor materials and luminescent materials lead to luminescence through carrier injection and recombination under the drive of an electric field, which can directly convert electrical energy into light energy. OLED is increasingly used for its advantages of active light emission, large viewing angle, fast response speed, wide temperature adaptation range, low driving voltage, low power consumption, high brightness, simple production process, light weight and flexible display. Used in commercial, electronic products, transportation, industry, medical, and military fields, it is considered to be a new type of flat paneldisplay device that can replace liquid crystal displays. I...
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