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Organic light-emitting device and preparation method thereof

An electroluminescent device and electroluminescent technology, which is applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc. problem, to achieve the effect of improving reflection, improving electron injection ability, and avoiding energy loss

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

Experimental program
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Effect test

Embodiment 1

[0060] A method for preparing an organic electroluminescent device, comprising the following steps:

[0061] (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;

[0062] (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;

[0063] Specifically, in this embodiment, the material of the hole injection layer is MoO 3 , with a thickness of 40nm; the material of the hole transport layer is TCTA, with a thickness of 40nm; the material of the light-emitting layer is Alq3, with a thickness of 10nm; the material of the electron transport layer is TAZ, with a thickness of 170nm...

Embodiment 2

[0069] A method for preparing an organic electroluminescent device, comprising the following steps:

[0070] (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;

[0071] (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;

[0072] Specifically, in this embodiment, the material of the hole injection layer is WO 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 Bphen, with a thickness of 200nm; ...

Embodiment 3

[0077] A method for preparing an organic electroluminescent device, comprising the following steps:

[0078] (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;

[0079] (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;

[0080] Specifically, in this embodiment, the material of the hole injection layer is V 2 o 5 , 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...

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Abstract

The invention provides an organic light-emitting device and a preparation method thereof. The organic light-emitting device adopts a mixed material, which is formed by mixing of a cesium salt, a first metal and a second metal, as a cathode so that electron injection capability and stability of the device are improved and light is enabled to reach a conductive anode glass substrate more effectively and thus the light-emitting efficiency of the device is improved. The preparation method is simple and easy in control and operation and raw materials are easy to obtain.

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): H01L51/52H01L51/54H01L51/56
CPCH10K50/82H10K50/856
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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