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New type organic electroluminous appliance

An electroluminescent device, an organic technology, applied in the field of optoelectronics, can solve problems such as limiting the service life of the device

Inactive Publication Date: 2005-05-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the action of water vapor and oxygen in the air, the metal cathode material is easily oxidized to form a non-conductive metal oxide, forming non-luminescent black spots on the OEL device, and limiting the service life of the device

Method used

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  • New type organic electroluminous appliance
  • New type organic electroluminous appliance
  • New type organic electroluminous appliance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Implementation example 1: Electron beam evaporation coating of lanthanum hexaboride

[0039] Put lanthanum hexaboride (single crystal or polycrystal) in a graphite pot and heat it with an electron beam to evaporate and deposit lanthanum hexaboride on a glass substrate. Figure 4 shows the transmittance characteristics of a lanthanum hexaboride film with a thickness of 150 nm. It can be seen that in the entire visible spectrum range, the lanthanum hexaboride film has a relatively high optical transmittance, while the magnesium-silver alloy cathode film with the same thickness can hardly transmit visible light at this thickness.

Embodiment 2

[0040] Implementation example 2: OEL device using lanthanum hexaboride cathode

[0041] A structure of an OEL device using a lanthanum hexaboride cathode is shown in Figure 7, after first depositing an ITO film 9 on a glass substrate 8, and then sequentially thermally evaporating a 12 nm thick copper phthalocyanine film 10 as a hole transport layer 6 , 60 nanometers thick 8-hydroxyquinine aluminum film 11 as the organic light-emitting layer 5 and 60 nanometers thick 8-hydroxyquinine aluminum film 12 as the electron transport layer 7; Thin film 13, and finally rethermally evaporated 1 micron thick metal aluminum layer 14 to enhance the conductivity of the cathode.

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Abstract

This invention discloses organic electroluminescence device which contains lanthanum hexaboride (LaB6) used as cathode, the surface of lanthanum hexaboride (LaB6) can be covered with metal membrane and ITO membrane to increase cathode conductivity or make cathode verification, the transparent cathode or nontransparent cathode can be obtained according to different thickness of lanthanum hexaboride (LaB6) and different property of covering layer. Said invention has long service life and high luminous brightness and efficiency.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics, and in particular relates to an organic light emitting diode device. Background technique [0002] Organic Electroluminescent Device (OEL for short) is also called Organic Light Emitting Diode (OLED for short), including polymer OLED and small molecule OLED. OEL devices have the characteristics of high luminous efficiency, low working voltage, simple structure, easy manufacture, low manufacturing cost, and can be made into moderately curved flexible devices, etc., and can efficiently emit white, green, blue, red, purple and other colors. Light. OEL devices will gradually be widely used in mobile phones, personal digital assistants (PDAs), computer displays, televisions, vehicle information displays, telephones, lighting and other application fields. Due to the significant advantages of OEL devices such as high luminous brightness, wide viewing angle, fast response speed, wide operating ...

Claims

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Application Information

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IPC IPC(8): H05B33/26H05B33/28
Inventor 林祖伦祁康成陈文彬付东王克斌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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