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Researchers Submit Patent Application, "Organic Light Emitting Diode Device", for Approval

February 26, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventor Yoon, Seok-Gyu (Yongin-City, KR), filed on February 21, 2013, was made available online on February 13, 2014.

The patent's assignee is Samsung Display Co., Ltd.

News editors obtained the following quote from the background information supplied by the inventors: "Embodiments of the present invention are directed to an organic light emitting diode device.

"Recently, there has been a desire for reduced size and thickness of a monitor, a television, or the like, and this desire has prompted replacement of a cathode ray tube (CRT) with a liquid crystal display (LCD). However, the liquid crystal display (LCD) does not only need a separate backlight (as it is a non-emissive device) but has also a limit in terms of response speed, viewing angle, and the like.

"Recently, these disadvantages have been expected to be overcome by an organic light emitting diode device (OLED) display. In general, an organic light emitting diode device includes two electrodes and an emission layer disposed therebetween. An OLED display emits a light when electrons injected from one electrode are combined with holes injected from the other electrode, forming excitons, which results in a release of energy.

"At least one of the two electrodes is a transparent electrode that externally transmits light. Accordingly, optical properties of the electrodes may have an influence on efficiency of the organic light emitting diode device."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventor's summary information for this patent application: "Aspects of embodiments of the present invention are directed to an organic light emitting diode (OLED) device including an electrode having high transmittance and a low absorption ratio.

"According to one embodiment, an organic light emitting diode device includes a first electrode, a second electrode opposite the first electrode, and an emission layer between the first electrode and second electrode. The first electrode includes a silver (Ag)-magnesium (Mg) alloy including a greater amount of Ag than Mg.

"The Mg may be included in an amount of less than or equal to about 30 volume % based on the total volume of the Ag--Mg alloy.

"The Mg may be included in a range of about 5 volume % to about 30 volume % based on the total volume of the Ag--Mg alloy.

"The first electrode may further include ytterbium (Yb).

"The Yb may be included in an amount of less than or equal to about 30 volume % based on the total volume of the Ag--Mg alloy.

"The Yb may be included in in a range of about 5 volume % to about 30 volume % based on the total volume of the Ag--Mg alloy.

"The first electrode may have a thickness of about 30 .ANG. to about 300 .ANG.

"The organic light emitting diode device may further include a Yb-containing auxiliary layer between the first electrode and emission layer.

"The auxiliary layer may have a thickness in a range of about 5 .ANG. to about 50 .ANG.

"The first electrode may have a light transmittance of greater than or equal to about 60% in a wavelength region of about 450 nm to about 750 nm.

"The first electrode may have a light transmittance in a range of about 60% to 85% in a wavelength region of about 450 nm to about 750 nm.

"The first electrode may have a light reflectance of less than or equal to about 40% in a wavelength region of about 450 nm to about 750 nm.

"The first electrode may have a light absorption of less than or equal to about 15% in a wavelength region of about 450 nm to about 750 nm.

"The second electrode may be a reflective electrode, and the emission layer may be configured to emit white light.

"The second electrode may be a transparent electrode, and the emission layer may be configured to emit white light.

"The first electrode may be a cathode.

BRIEF DESCRIPTION OF THE DRAWINGS

"FIG. 1 is a cross-sectional view depicting an organic light emitting diode device according to one embodiment,

"FIG. 2 is a graph of light transmittances of Ag--Mg alloy thin films according to Examples 1-1 to 1-4 and Comparative Example 1,

"FIG. 3 is a graph of light reflectances of the Ag--Mg alloy thin films according to Examples 1-1 to 1-4 and Comparative Example 1,

"FIG. 4 is a graph of light absorptions of the Ag--Mg alloy thin films according to Examples 1-1 to 1-4.

"FIG. 5 is a graph of light transmittances of Ag--Mg alloy thin film according to Examples 2-1 to 2-5,

"FIG. 6 is a graph of light reflectances of the Ag--Mg alloy thin films according to Examples 2-1 to 2-5, and

"FIG. 7 is a graph of light absorptions of the Ag--Mg alloy thin film according to Examples 2-1 to 2-5."

For additional information on this patent application, see: Yoon, Seok-Gyu. Organic Light Emitting Diode Device. Filed February 21, 2013 and posted February 13, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5634&p=113&f=G&l=50&d=PG01&S1=20140206.PD.&OS=PD/20140206&RS=PD/20140206

Keywords for this news article include: Electronics, Light-emitting Diode, Samsung Display Co. Ltd.

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Source: Electronics Newsweekly


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