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Organic light-emitting device and manufacturing method thereof

A technology of organic light-emitting device and organic emission layer, which is applied in semiconductor/solid-state device manufacturing, semiconductor devices, electrical components, etc., and can solve problems such as work function negativity

Active Publication Date: 2017-07-11
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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  • Organic light-emitting device and manufacturing method thereof
  • Organic light-emitting device and manufacturing method thereof
  • Organic light-emitting device and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0114] In one embodiment, the moisture sensitive electrode of an electronic device is divided into two or more layers sandwiching another metallic, inorganic or organic layer to mitigate degradation. To illustrate with the help of comparative examples, Figure 4 A 3-D view and a cross-sectional view (both schematic) of a device with a single layer cathode are shown. Dark spots form when water vapor penetrates the encapsulating film to the cathode-organic interface, stopping emission from the affected area.

[0115] Figure 5 Schematic 3-D diagrams and cross-sectional views of devices with multiple layers or "split" cathodes are shown. Defects formed away from the cathode-organic interface are shown (no dark spots formed). Figure 5 The device includes a substrate 510 , an anode 520 , an organic layer 530 , a cathode and a barrier film 550 . The cathode includes a first conductive layer 541 , a separation layer 542 and a second conductive layer 543 . Dark spots 460 are als...

Embodiment approach 2

[0118] Figure 6 A cross-sectional view of a flexible device with a bottom desiccant layer and a multilayer cathode is shown. Defects formed away from the cathode-organic interface are shown (no dark spots formed). Figure 6 The device includes substrate 610 , permeation barrier layer 611 (also called bottom barrier layer), water reactive layer 612 (also called bottom desiccant layer), bottom anode 620 , organic layer 630 , cathode, and barrier film 650 . The cathode includes a first conductive layer 641 , a separation layer 642 and a second conductive layer 643 . Dark spots 660 are also shown.

[0119] Figure 6Embodiments of the invention relate to water vapor permeable flexible substrates. Such a substrate preferably involves the use of a bottom barrier film. In such devices, water vapor travels from the top and bottom sides. As with previous embodiments, water vapor from the top and bottom sides can reach the water-sensitive cathode and form defects at the cathode-or...

Embodiment approach 3

[0121] Figure 7 Shown is a cross-sectional view of a device with a multilayer cathode with a bridge between two cathode layers formed via fracture of the interlayer. Defects formed away from the cathode-organic interface are shown (no dark spots formed). Figure 7 The device includes a substrate 710 , a first electrode 720 , an organic layer 730 , a second electrode, and a barrier film 750 . The cathode includes a first conductive layer 741 , a separation layer 742 and a second conductive layer 743 . Dark spots 760 are also shown.

[0122] exist Figure 7 In an embodiment, the first conductive layer and the second conductive layer are bridged by a bridge 744 . That is, the separation layer 742 has a region allowing the first conductive layer and the second conductive layer to contact. The spacer layer 742 need not be continuous. This configuration takes advantage of the conductivity of the second conductive layer. During storage, the second conductive layer may become ...

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PUM

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Abstract

An apparatus is provided. The device includes a first electrode, an organic layer disposed on the first electrode, and a second electrode disposed on the organic layer. The second electrode further includes a first conductive layer having an extinction coefficient and a refractive index, a first separation layer disposed on the first conductive layer, and a second conductive layer disposed on the first separation layer. At 500 nm, the extinction coefficient of the first spacer layer is at least 10% different from the extinction coefficient of the first conductive layer, or at 500 nm, the refractive index of the first spacer layer is different from that of the first conductive layer The refractive indices differ by at least 10%. The device also includes a barrier layer disposed on the second conductive layer.

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. [0002] field of invention [0003] The invention relates to a separating electrode. [0004] Background of the invention [0005] 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 inorganic devices. Furthermore, the intrinsic properties of organic materials, such as their flexibility, can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/56
CPCH10K50/828H10K50/846H10K50/13H10K50/11H10K50/85H10K50/84H10K71/00H10K50/844H10K50/858
Inventor 普拉什昂特·曼德里克马瑞青
Owner UNIVERSAL DISPLAY