Luminescent metal complexes for organic electronic devices

A technology of organic electronic devices and metal complexes, applied in the direction of osmium organic compounds, ruthenium organic compounds, rhodium organic compounds, etc., can solve problems such as the formation of undesirable aggregates, low sublimation ability, and manufacturing reproducibility

Inactive Publication Date: 2010-03-31
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In luminophores to date, problems can arise, especially with regard to long-term stability, thermal stability and chemical stability towards water and oxygen
Additionally, many luminophores show only a low sublimation capacity
In addition, the important emission colors are often not achievable with the currently known emitter materials
In addition, high efficiencies often cannot be achieved simultaneously with high current densities or high luminous densities
Finally, in the case of many emitter materials, there are questions regarding fabrication reproducibility
Another frequently observed problem is the formation of undesirable aggregates

Method used

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  • Luminescent metal complexes for organic electronic devices
  • Luminescent metal complexes for organic electronic devices
  • Luminescent metal complexes for organic electronic devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0235] Embodiment 1: the synthesis of Pt(ppy) (7a)

[0236] The complex Pt(ppy)(7a) was prepared by the reaction of Pt(ppy)(ppyH)Cl and 1,2-bis(diphenylphosphine)-closed-carborane (Scheme 2). Equimolar amounts of Pt(ppy)(ppyH)CI and 1,2-bis(diphenylphosphine)-close-carborane were heated in ethanol at reflux under argon for 12 h. After cooling to room temperature, the crude product precipitated from the reaction mixture was purified by chromatography (AI 2 o 3 , hexane / dichloromethane). The purification is carried out by crystallization from hot ethanol.

[0237] Reaction 2

[0238] The molecular structure of Pt(ppy)(7a) in the crystal is shown in Image 6 middle. The photoluminescence spectrum of Pt(ppy)(7a) is shown in Figure 12 middle.

Embodiment 2

[0239] Embodiment 2: the synthesis of Pt(dfppy) (7a)

[0240] The complex Pt(dfppy) was prepared by the reaction of Pt(dfppy)(dfppyH)Cl and 1,2-bis(diphenylphosphine)-closed-carborane (Equation 3). Equimolar amounts of Pt(dfppy)(dfppyH)CI and 1,2-bis(diphenylphosphine)-close-carborane were stirred and refluxed in ethanol under argon for 12 h. After cooling to room temperature, the crude product precipitated from the reaction mixture was purified by chromatography (AI 2 o 3 , hexane / dichloromethane). Alternatively, the product was recrystallized from hot ethanol.

[0241] Reaction 3

[0242] The molecular structure of Pt(dfppy)(7a) in the crystal is shown in Figure 7 middle. The phosphorescence spectrum of Pt(dfppy)(7a) is shown in Figure 13 middle.

Embodiment 3

[0243] Example 3: Pt(ppy)(7b)

[0244] The reaction mixture obtained from Example 1 was chromatographed (Al 2 o 3 , hexane / dichloromethane), a small amount of Pt(ppy) (7b) was obtained. This species is less polar than the main product, Pt(ppy) (7a). The molecular structure of Pt(ppy)(7b) is shown in Figure 8 middle. The phosphorescence spectrum of Pt(ppy)(7b) is shown in Figure 14 middle.

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Abstract

The present invention relates to auxiliary ligands for luminescent metal complexes, particularly emitter complexes having such auxiliary ligands, and particularly light-emitting devices, and particularly organic light-emitting devices (OLED) having metal complexes, which have the auxiliary ligands according to the invention.

Description

technical field [0001] The present invention relates to the use of metal complexes containing bulky, carborane-containing auxiliary ligands in organic electronic devices, in particular in light-emitting devices, to metal complexes containing these ligands, and to organic electronic devices , in particular organic light-emitting diodes (OLEDs) comprising metal complexes comprising said carborane-containing auxiliary ligands. Background technique [0002] Recent dramatic changes in the field of display screen and lighting technology are evident. Flat panel displays or light emitting regions with a thickness of less than 0.5 mm can be fabricated. It is characterized by many attractive properties. Thus, for example, luminous areas can be produced as wallpaper with very low energy consumption. Of particular interest, however, is the possibility to fabricate color display screens with hitherto unattainable color fidelity, brightness and viewing angle independence, with low weig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C07F9/6561C07F15/00C09K11/00H01L51/00H05B33/00
CPCC09K2211/1011C07F15/0093C09K2211/1029C09K2211/1092C07F9/5045C07F15/0073C07F15/002H01L51/0087C07F15/0086H01L51/5012C09K2211/185C07F15/0046H01L51/0084C09K2211/1007C09K11/06C07F15/008H01L51/0037C09K2211/188C07F13/005C07F15/0053H01L51/008H01L51/5016C07F15/0026H01L51/0081Y02E10/549H10K85/1135H10K85/322H10K85/341H10K85/346H10K85/324H10K50/11H10K2101/10
Inventor 哈特穆特·耶尔森拉法尔·切尔维涅茨乌维·蒙科维乌斯
Owner MERCK PATENT GMBH
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