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Blue-light organic electroluminescent device with chrominance adjustment layer and preparation method thereof

A regulating layer and luminescent technology, applied in the direction of electrical solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., to achieve the effects of low cost, easy industrialization, and high efficiency

Inactive Publication Date: 2011-10-19
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An ideal blue organic electroluminescent device should exhibit high luminous efficiency and good color purity, which cannot be achieved according to existing materials and traditional structures

Method used

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  • Blue-light organic electroluminescent device with chrominance adjustment layer and preparation method thereof
  • Blue-light organic electroluminescent device with chrominance adjustment layer and preparation method thereof
  • Blue-light organic electroluminescent device with chrominance adjustment layer and preparation method thereof

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and further explanation to this example.

[0031] Such as figure 1 Shown, the blue light organic electroluminescence device with chromaticity adjustment layer in this example, comprises ITO glass substrate (1), hole injection layer (2), hole transport layer (3), chromaticity adjustment layer (4) , a light emitting layer (5), an electron transport layer (6) and a composite cathode (7).

[0032] The detailed steps and process of the preparation method of the organic electroluminescent device with this structure are as follows:

[0033] A. Select an ITO glass substrate (1) that meets the required size (effective area 5 mm×5 mm) and surface resistance (20 Ω / □). The ITO glass is first cleaned with decontamination powder, followed by acetone, absolute ethanol, and deionized Ultrasonic cleaning with water for 30 minutes, drying in an oven, UV-Ozone treatment, and putting into vacuum evaporation equipment;

[0034] B. in 4×10 ...

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Abstract

The invention relates to a blue-light organic electroluminescent device with a chrominance adjustment layer and a preparation method thereof. The device is formed by an ITO (Indium Tin Oxide) glass substrate (1), a hole injection layer (2), a hole transmission layer (3), a chrominance adjustment layer (4), a luminous layer (5), an electron transfer layer (6) and a composite cathode (7) in sequence. Each structural layer is prepared by adopting a vacuum evaporation method. In the device, the luminous layer is [TBADN:DSA-Ph], and the ultra-thin chrominance adjustment layer [DPVBi:BCzVB] is inserted between the luminous layer and the hole transmission layer. The luminous layer can produce sky blue light with high luminous efficiency, the chrominance adjustment layer can produce dark blue light with high color purity, and the sky blue light and the dark blue light produced by the luminous layer and the chrominance adjustment layer are synthesized into blue light. With the structure, the color purity of the device can be efficiently improved, and the blue-light organic electroluminescent device with high efficiency and color saturation is obtained. The invention has the advantages of simple technology, low cost, easiness for industrialization, and the like, and can be widely applied in organic electroluminescent display.

Description

technical field [0001] The invention relates to a blue light organic electroluminescent device with a chromaticity adjustment layer and a preparation method thereof. In the present invention, the light-emitting layer is [TBADN: DSA-Ph], and an ultra-thin chromaticity adjustment layer [DPVBi: BCzVB] is inserted between the light-emitting layer and the hole transport layer. The former can produce sky blue light with high luminous efficiency, and the latter can produce deep blue light with high color purity, and use the colored light produced by the two to synthesize blue light. By adopting the structure of the chromaticity adjustment layer, the color purity of the device can be effectively improved, and a high-efficiency, color-saturated blue organic electroluminescent device can be obtained. The invention has many advantages such as simple process, low cost and easy industrialization, and can be widely used in flat panel display and solid-state lighting. Background technique...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
Inventor 林华平周帆李俊蒋演蒋雪茵张志林
Owner SHANGHAI UNIV
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