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Multicolored organic LED

A light-emitting diode, organic technology, applied in the direction of light-emitting materials, electrical components, circuits, etc.

Inactive Publication Date: 2009-06-10
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to realize a device that can emit multiple colors, the general method is to superimpose several devices that can emit light of different colors, and realize multi-color display through the control circuit, or use a filter to filter the light with a wider emission band. Light is filtered to obtain devices that emit light of several colors, but there is no research on a single device that emits light of different colors

Method used

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  • Multicolored organic LED
  • Multicolored organic LED
  • Multicolored organic LED

Examples

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preparation example Construction

[0069] Device preparation method:

[0070] (1) Doping method: The doping ratio is the weight percentage of TTP or TPP added according to the weight of MEH-PPV, and they are put into a certain amount of organic solvent at the same time to form a mixed solution. The concentration is 1-8%, preferably 3%.

example 1

[0071] Example 1: Add 0.6mg of TTP to 20mg of MEH-PPV, then dissolve them in 1ml of chloroform to form a mixed solution, filter it with a 0.45μm filter, and then use it for spin coating to form a membrane.

example 2

[0072] Example 2: Add 0.6mg of TPP to 20mg of MEH-PPV, then dissolve them in 1ml of chloroform to make a mixed solution, filter it with a 0.45μm filter, and then use it for spin coating to form a membrane.

[0073] (2) The manufacturing process of the device: refer to figure 2 , on the cleaned ITO, apply a 20nm thick PEDOT / PSS film layer by spin coating method, and dry it in vacuum to remove the remaining solvent; then apply a 100nm thick MEH- PPV+3%TTP light-emitting layer, vacuum-dried to remove residual solvent; finally, use vacuum coating technology to deposit a metal cathode with a thickness of 100nm, and the metal cathode can be specifically Al. The thickness of the film layer affects the light emission of the device. Too thick or too thin will affect the light emission, and some may even not emit light.

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Abstract

The invention discloses a heterogeneous organic luminous diode, which comprises the following parts: anode, cavity injection layer on the anode, luminous layer on the cavity injection layer and cathode on the luminous layer, wherein the anode is indium tin oxide; the cavity injection layer is PEDOT: PSS; the luminous layer is TTP or TPP doping MEH-PPV at 1-8 percent density; the cathode is aluminum metal. The invention can illuminate red, orange, yellow and green color light, which realizes colorful display of single-layer device.

Description

technical field [0001] The invention relates to an organic light-emitting element, in particular to a multi-color organic light-emitting diode (OLED). Background technique [0002] The purpose of organic electroluminescence is to realize colorful display. Organic Light Emitting Diodes (OLEDs) can emit light of various colors, but, in general, one device emits one kind of light. In order to realize a device that can emit multiple colors, the general method is to superimpose several devices that can emit light of different colors, and realize multi-color display through the control circuit, or use a filter to filter the light with a wider emission band. Light is filtered to obtain devices that emit light of several colors, but there is no research on a single device that emits light of different colors. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a multi-color organic light-emitting di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/54C09K11/06H01L51/52
Inventor 钟国伦吴俊
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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