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Organic light emitting device and its mfg. method

An organic light-emitting device and organic layer technology, which can be applied to bathing devices, lighting devices, electroluminescent light sources, etc., and can solve the problems of reducing light reflectivity, reducing reflectivity and reducing the brightness of top-emitting organic light-emitting devices, etc.

Active Publication Date: 2005-11-16
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reduces the reflectivity of light emitted from the organic layer, and the reduced reflectivity reduces the brightness of top-emitting organic light-emitting devices.

Method used

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  • Organic light emitting device and its mfg. method
  • Organic light emitting device and its mfg. method
  • Organic light emitting device and its mfg. method

Examples

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Embodiment Construction

[0032] Such as Figure 3A As shown, a reflection layer 210a (formed of a metal material having excellent reflection efficiency) is formed on an insulating substrate 200 . The reflection layer 210a is formed of a material having excellent reflection efficiency, which has an oxidation-reduction potential (a.k.a., RedoxPotential) difference of about 0.3 or less with respect to the pixel electrode. This helps to prevent electrochemical reactions with the pixel electrodes to be formed. More preferably, the reflective layer 210a may be formed of Al-Ni alloy.

[0033] Preferably, the Al-Ni alloy used for the reflective layer 210a may be an aluminum alloy containing about 10% or less of nickel (Ni).

[0034] The reflective layer 210a may be formed by a general method such as radio frequency (RF) sputtering, direct current (DC) sputtering, ion beam sputtering, vacuum deposition, and the like.

[0035] In addition, a glass substrate or a plastic substrate may be used as the substrate...

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PUM

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Abstract

An organic light emitting device may includes a pixel electrode formed on a substrate and having a reflecting layer and a transparent electrode layer, a pixel defining layer having an opening to expose a portion of the pixel electrode, an organic layer formed on the opening, and an upper electrode formed on an entire surface of the substrate. The reflecting layer may be a material having excellent reflection efficiency and having an oxidation-reduction potential difference of about 0.3 or less with respect to the transparent electrode layer.

Description

[0001] This application claims priority from Korean Patent Application No. 2004-32844 filed on May 10, 2004, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to an organic light-emitting device, in particular to an organic light-emitting device capable of preventing galvanic reaction in reflective pixel electrodes. Background technique [0003] In general, an organic light-emitting device is a light-emitting device that is generated when electrons and holes are injected from an electron injection electrode (cathode) and a hole injection electrode (anode) into an emission layer, and the injected electrons and holes recombine. Light is emitted when the excited electron-hole pair transitions from the excited state to the ground state. [0004] The use of this principle eliminates the need for a separate light source that is necessary in conventional thin film liquid crystal display devices, thereby reducin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/24H01L29/08H01L29/18H01L29/20H01L29/22H01L51/00H01L51/50H01L51/52H05B33/10H05B33/12H05B33/14H05B33/26H05B33/28H10N10/856
CPCH01L51/5271H01L2251/5315H01L51/5206H10K2102/3026H10K59/80518H10K59/878A61H33/10A61H33/065A61H2201/102A61H2201/0149A61H2201/0228A61H2205/086A61H2205/087A61H2201/025H10K50/818H10K50/856
Inventor 申铉亿
Owner SAMSUNG DISPLAY CO LTD