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Organic light-emitting device and preparation method thereof

An electroluminescent device and luminescence technology, which is applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of poor cathode electron injection ability, poor device stability, device luminous efficiency, and low light extraction performance, etc. problem, to achieve the effect of improving photon utilization rate, easy film formation, improving conductivity and light reflectivity

Inactive Publication Date: 2014-10-29
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In traditional light-emitting devices, metals or alloys with low work functions are generally used as cathodes. In this structure, the metals with low work functions are chemically active and easy to oxidize in the air, making the device less stable, and The electron injection ability of the cathode is not good, resulting in low luminous efficiency and light extraction performance of the device

Method used

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  • Organic light-emitting device and preparation method thereof
  • Organic light-emitting device and preparation method thereof

Examples

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Embodiment 1

[0063] A method for preparing an organic electroluminescent device, comprising the following steps:

[0064] (1) Ultrasonic cleaning of the ITO glass substrate with detergent and deionized water for 15 minutes each to obtain a clean conductive anode glass substrate;

[0065] (2) In the high vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), the pressure is 8×10 -5 Under the condition of Pa, on a clean conductive anode glass substrate, thermally resistively evaporated hole injection layer, hole transport layer, light emitting layer, electron transport layer and electron injection layer in sequence;

[0066] Specifically, in this embodiment, the material of the hole injection layer is WO 3 , with a thickness of 35nm; the material of the hole transport layer is NPB, with a thickness of 40nm; the material of the light-emitting layer is Alq3, with a thickness of 20nm; the material of the electron transport layer is Bphen, with a thickness of 80nm;...

Embodiment 2

[0073] A method for preparing an organic electroluminescent device, comprising the following steps:

[0074] (1) Ultrasonic cleaning of the AZO glass substrate with detergent and deionized water for 15 minutes each to obtain a clean conductive anode glass substrate;

[0075] (2) In the high vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), the pressure is 2×10 -3 Under the condition of Pa, on a clean conductive anode glass substrate, thermally resistively evaporated hole injection layer, hole transport layer, light emitting layer, electron transport layer and electron injection layer in sequence;

[0076] Specifically, in this embodiment, the material of the hole injection layer is MoO 3 , with a thickness of 80nm; the material of the hole transport layer is NPB, with a thickness of 60nm; the material of the light-emitting layer is ADN, with a thickness of 5nm; the material of the electron transport layer is TAZ, with a thickness of 200nm; t...

Embodiment 3

[0082] A method for preparing an organic electroluminescent device, comprising the following steps:

[0083] (1) Ultrasonic cleaning of the IZO glass substrate with detergent and deionized water for 15 minutes each to obtain a clean conductive anode glass substrate;

[0084] (2) In the high vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), the pressure is 5×10 -5 Under the condition of Pa, on a clean conductive anode glass substrate, thermally resistively evaporated hole injection layer, hole transport layer, light emitting layer, electron transport layer and electron injection layer in sequence;

[0085] Specifically, in this embodiment, the material of the hole injection layer is WO 3 , with a thickness of 20nm; the material of the hole transport layer is TAPC, with a thickness of 30nm; the material of the light-emitting layer is BCzVBi, with a thickness of 40nm; the material of the electron transport layer is TPBi, with a thickness of 60n...

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Abstract

The invention provides an organic light-emitting device and a preparation method thereof. According to the organic light-emitting device, the cathode is made from a mixing material formed by mixing of an electron transport material, a metal with the work function of -4.0eV to -5.5eV and a thiophene micromolecule material based on a mass ratio of 1: (0.05-0.2) : (0.5-1). Therefore, the light extraction performance of the device is improved and the light can reach the conductive anode glass substrate effectively, thereby improving the luminous efficiency of the device. The preparation method is simple and is easy to control and operation; and the raw material is easy to access.

Description

technical field [0001] The invention belongs to the field of organic electroluminescence, and in particular relates to an organic electroluminescence device and a preparation method thereof. Background technique [0002] An organic electroluminescent device (OLED) is an energy conversion device that uses organic materials as light-emitting materials and can convert applied electrical energy into light energy. It has outstanding performances such as ultra-thin, self-luminous, fast response, low power consumption, etc., and has extremely broad application prospects in display, lighting and other fields. [0003] The structure of organic electroluminescent devices is a sandwich structure, with one or more organic thin films sandwiched between the cathode and the conductive anode. In a device with a multi-layer structure, the inside of the two poles mainly includes a light emitting layer, an injection layer and a transport layer. The organic electroluminescent device is a carr...

Claims

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Application Information

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IPC IPC(8): H01L51/54H01L51/56
CPCH10K50/82H10K50/854H10K50/856
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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