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Crosslinkable equilibrium charge injected with organic semiconductor and application of organic light emitting diode

A technology of light-emitting diodes and organic semiconductors, applied in semiconductor devices, semiconductor/solid-state device manufacturing, organic chemistry, etc., can solve problems that are not suitable for large-area, low-cost OLED devices

Active Publication Date: 2017-05-31
GUANMAT OPTOELECTRONICS MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, all the above-mentioned materials can only be formed into films by vacuum evaporation, and it is not suitable to use solution film formation to obtain large-area, low-cost OLED devices.

Method used

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  • Crosslinkable equilibrium charge injected with organic semiconductor and application of organic light emitting diode
  • Crosslinkable equilibrium charge injected with organic semiconductor and application of organic light emitting diode
  • Crosslinkable equilibrium charge injected with organic semiconductor and application of organic light emitting diode

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Effect test

Embodiment 1

[0079] Embodiment 1: Synthesis and preparation of compound

[0080] The following crosslinkable host material compounds were prepared according to the principle of the general chemical reaction formula. The molecular weight and molecular fragments of the listed compounds were verified by mass spectrometry. See Table 1 for details.

[0081] Table 1: Compound synthesis and characterization

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Embodiment 2

[0087] Embodiment 2: device application example

[0088] On the surface of a conductive glass ITO, after solvent and plasma cleaning, the solution is spin-coated with PEDOT conductive polymer as the hole injection layer, and the poly(triphenylamine-9.9-diheptane fluorene) solution spin-coated film is used as the hole transport layer. Then use 2% host material / luminescent dopant green light Ir(Me-PPY) 3 or red light Ir(piq-hex) 3 (doping concentration 8% by weight) After the mixed solution is spin-coated, it is heated to 160 under nitrogen o C treatment for 30 minutes to make the film infusible and insoluble; secondly use the solution to spin coat a layer of TPBi (300 Å), and finally in a background vacuum up to 10 -5 In Pa's multi-source evaporation OLED preparation equipment, the electron injection layer LiF (10 Å) / Al100 Å was evaporated to prepare OLED devices. Different Host OLED light-emitting devices are used for comparison. Compare the main material:

[0089] , ...

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Abstract

The invention discloses an organic light emitting diode. The organic light emitting diode comprises a cathode, an anode, and an organic semiconductor layer positioned between the cathode and the anode, wherein the organic semiconductor layer includes an organic light emitting layer which contains acrosslinkable equilibrium charge injected with organic semiconductor compounds, and a general formula is shown in the specification. The organic semiconductor layer is characterized in that the an N atom of the equilibrium chargeinjected with naphthalene pyridine indole compounds is connected to a crosslinkable heteroaromatic fusing ring so as to improve the injection of charge balance and the stability of photoluminescence. Solution cast film is obtained, and then an OLED device of low cost and large area is obtained by chemical crosslinking.

Description

technical field [0001] The invention relates to the application of organic semiconductors in organic light-emitting devices, especially an organic semiconductor material that balances charge injection and transport, which can be used as a host material in organic light-emitting devices to improve device performance. Background technique [0002] Organic semiconductor materials are new types of optoelectronic materials, and their large-scale research originated in 1977 when Hideki Shirakawa, A. Heeger and A. McDiamid jointly discovered doped polyacetylene with conductivity up to copper level. Subsequently, in 1987, C. Tang of KodaK Company invented the organic small molecule light-emitting diode (OLED), and in 1990, R. Friend and A.Holmes of Cambridge University invented the polymer light-emitting diode P-OLED, and in 1998, S. Forrest and M. Thomson invented a more efficient organic phosphorescent light-emitting diode PHOLED. Because organic semiconductor materials have a st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54C07D471/04C07D519/00
CPCC07D471/04C07D519/00H10K85/60H10K85/654H10K85/6572H10K50/11
Inventor 李晓常洪海兵
Owner GUANMAT OPTOELECTRONICS MATERIALS INC