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Novel organic light emitting materials

A compound, independent technology, applied in the fields of luminescent materials, organic chemistry, indium organic compounds, etc., can solve problems such as work function negativity

Inactive Publication Date: 2013-06-19
UNIVERSAL DISPLAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the work function is usually measured as a negative number relative to the vacuum level, this means that "higher" work functions are more negative

Method used

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Embodiment Construction

[0045] Typically, an OLED includes at least one organic layer disposed between and electrically connected to an anode and a cathode. When a current is applied, the anode injects holes into the organic layer, and the cathode injects electrons into the organic layer. The injected holes and electrons each migrate toward oppositely charged electrodes. When an electron and a hole are localized on the same molecule, an "exciton" is formed, which is a localized electron-hole pair with an excited energy state. Light will be emitted when the excitons relax via the photoemission mechanism. In some cases, excitons can be localized on excimer associations or exciplexes. Non-radiative mechanisms can also occur, such as thermal relaxation, but are generally considered to be undesirable.

[0046] Initial OLEDs used emissive molecules that could emit light ("fluoresce") from the molecule's singlet state, as disclosed, for example, in US Patent No. 4,769,292, the contents of which are incor...

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PUM

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Abstract

Novel phosphorescent metal complexes containing 2-plienylisoquinoline ligands with at least two substituents on the isoquinoline ring are provided. The disclosed compounds have low sublimation temperatures that allow for ease of purification and fabrication into a variety of OLED devices.

Description

[0001] The claimed invention is made by, in the name of, or jointly with one or more of the parties to the joint university-industry research agreement ie: the Regents of the University of Michigan, Princeton University, The University of Southern California, and Universal Display Corporation. The agreement was in effect on or before the date the claimed invention was made and the claimed invention was made as a result of activities performed within the scope of the agreement. field of invention [0002] The present invention relates to metal complexes containing heterocyclic ligands having at least two substituents. These metal complexes are suitable for OLED devices. Background of the invention [0003] Optoelectronic devices utilizing organic materials have become increasingly desirable for a number of reasons. Most of the materials used to make such devices are relatively inexpensive, so organic optoelectronic devices have the potential for cost advantages over inorgan...

Claims

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Application Information

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IPC IPC(8): C07F15/00C09K11/06H01L51/54
CPCC07F15/0033H05B33/14C09K2211/185C09K11/025C09K11/06Y02E10/549H10K85/342H10K50/18H10K50/17C09K2211/1029H10K85/6572H10K50/11H10K50/12H10K50/15H10K50/16H10K50/171H10K2101/10
Inventor 马斌A·德安格里斯夏传军
Owner UNIVERSAL DISPLAY
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