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Graphene OLED device and preparation method thereof

A graphene and device technology, applied in the field of graphene OLED devices and their preparation, can solve the problems of low power consumption, poor luminous efficiency and stability, weak affinity, etc., to improve electrical conductivity, improve injection efficiency, and improve performance effect

Inactive Publication Date: 2020-12-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Organic Light Emitting Diode (OLED) is also known as organic laser display and organic light emitting semiconductor. OLED display technology has the advantages of self-illumination, wide viewing angle, almost infinitely high contrast, low power consumption, and extremely high response speed. The luminescence of OLED devices The performance is mainly related to the energy level matching between the functional layers. Due to the weak affinity between the functional layers of traditional OLED devices, the luminous efficiency and stability are poor. Therefore, it is necessary to design a high luminous efficiency, Stable OLED device

Method used

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  • Graphene OLED device and preparation method thereof
  • Graphene OLED device and preparation method thereof
  • Graphene OLED device and preparation method thereof

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Effect test

Embodiment 1

[0030] A graphene OLED device, the structure of the OLED device includes from bottom to top: glass substrate, ITO anode, PEDOT:PSS film layer, graphene oxide film layer, hole transport layer NPB, electron transport layer Alq3, electron injection layer LiF and Al cathode.

[0031] The invention is a stacked OLED device, the brightness and current efficiency of the device can be changed with the stacked light-emitting units, and the stacked OLED device can also realize high brightness at low current density, avoid leakage current and electric field breakdown, and realize long life of the device .

[0032] The glass substrate is smooth and flat, and the rough substrate will cause the anode to appear uneven, which is prone to short circuit of the device, resulting in irreparable damage.

[0033] Diffusion of metal in the ITO electrode to the organic layer is an important reason for the decline of OLED efficiency and stability. Adding a modification layer between the electrode and...

Embodiment 2

[0045] A graphene OLED device, the structure of the OLED device includes from bottom to top: glass substrate, ITO anode, PEDOT:PSS film layer, two layers of graphene oxide film layer, hole transport layer NPB, electron transport layer Alq3, electron injection layer LiF and Al cathode.

Embodiment 3

[0047] A graphene OLED device, the structure of the OLED device includes from bottom to top: glass substrate, ITO anode, PEDOT:PSS film layer, three layers of graphene oxide film layer, hole transport layer NPB, electron transport layer Alq3, electron injection layer LiF and Al cathode.

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Abstract

The invention discloses a graphene OLED device and a preparation method thereof. The structure of the OLED device comprises a glass substrate, an ITO anode, a PEDOT: PSS film layer, a graphene oxide film layer, a hole transport layer NPB, an electron transport layer Alq3, an electron injection layer LiF and an Al cathode from bottom to top. According to the invention, a laminated structure is adopted to realize high brightness under low current density, and current leakage and electric field breakdown are avoided. Meanwhile, the PEDOT: PSS film layer and the graphene oxide film layer are arranged to modify the ITO anode, graphene oxide can improve the conductivity, make up the problem that the PEDOT: PSS conductivity is low, reduce the sheet resistance and further improve the performance of the OLED device. In addition, the electron injection layer LiF and the Al cathode are arranged to form a double-layer cathode structure, so that the electron injection efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a graphene OLED device and a preparation method thereof. Background technique [0002] Organic Light Emitting Diode (OLED) is also known as organic laser display and organic light emitting semiconductor. OLED display technology has the advantages of self-illumination, wide viewing angle, almost infinitely high contrast, low power consumption, and extremely high response speed. The luminescence of OLED devices The performance is mainly related to the energy level matching between the functional layers. Due to the weak affinity between the functional layers of traditional OLED devices, the luminous efficiency and stability are poor. Therefore, it is necessary to design a high luminous efficiency, Stable OLED device. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the present invention provides a Sb compound-based intermedia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/56
CPCH10K71/12H10K50/17H10K50/171H10K50/814H10K50/824
Inventor 陈李胜胡云峰陈卉水玲玲
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST
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