Material for use in the manufacturing of luminous display devices

A device, oxide technology, applied in organic light-emitting diodes, materials used in organic light-emitting diodes, preparing the field of materials, can solve the problems of chemical stability and low conductivity, etc.

Inactive Publication Date: 2008-01-09
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] However, despite hermetically encapsulated organic polymers have limited chemical stability and low electrical conductivity (typically about 1 to 5.10 -2 Ω.cm compared to ITO's 10 -4 Ω.cm) and other defects

Method used

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  • Material for use in the manufacturing of luminous display devices
  • Material for use in the manufacturing of luminous display devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] Example 1: Glass support coated with ITO layer and ATO layer

[0141] 1. A product sold by Samsung Corning Co., which uses a vacuum spraying technique to coat an ITO layer on a glass substrate of 0.7 mm was used.

[0142] This ITO layer has the following properties:

[0143] · Thickness is 192nm,

[0144] · The surface impedance is 7.6Ω / □,

[0145] · Average roughness (Rrms) measurement 5μm 2 4.7nm,

[0146] · Peak-valley roughness (Rpv) measurement 5μm 2 31.1nm,

[0147] · Working performance between 4.3-4.6eV,

[0148] · Transmittance is 83% within the visible range.

[0149] 2. The coating solution is prepared by adding tin dichlorodiacetate SnCl 2 (OAc) 2 Dissolve in ethanol with the addition of 4-hydroxy-4-methyl-pentanone (CAS 123-42-2) as a stabilizer. The relative amounts of tin and antimony were calculated to be 7 mol% for the final doping. The concentration of the stabilizer relative to tin was 2 mol%. Ethanol was added to give a final tin concentr...

Embodiment 2

[0159] Embodiment 2 (comparison)

[0160] For comparison purposes, a layer of ATO was directly deposited on a glass substrate with the same precursor solution used in Example 1 under the same deposition and heat treatment conditions, but no coated ITO layer was present on the glass substrate.

[0161] The properties of the resulting coating are:

[0162] · Surface impedance: 1890Ω / □,

[0163] · Optical transmittance: 85%,

[0164] · Working performance: 4.8 to 5.2eV,

[0165] Coating thickness: 108nm,

[0166] · Average roughness (Rrms): at 100nm 2 Measured within a square area to be 1nm,

[0167] · Peak-valley roughness (Rpv): at 100nm 2 Measured within the square area to be 3.6nm,

Embodiment 3

[0168] Embodiment 3 (comparison)

[0169] For comparison purposes, eight consecutive ATO layers were deposited directly on the substrate with the same precursor solution as used in Example 2 under the same deposition and thermal post-treatment conditions.

[0170] The properties of these coatings are:

[0171] · Surface impedance: 50 to 55Ω / □,

[0172] · Optical transmittance: 65%,

[0173]· Working performance: 4.8 to 5.2eV,

[0174] Coating thickness: 600nm,

[0175] · Average roughness (Rrms) measurement 100nm 2 The square area is 2.5nm,

[0176] · Peak-valley roughness (Rpv) measurement 100nm 2 The square area is 8nm,

[0177] The properties of supports coated only with an ITO layer, the coated supports according to inventive example 1 (ATO / ITO) and the coated supports according to comparative examples 2 and 3 are listed in the table below:

[0178] ITO

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Abstract

A material for in the fabrication of a luminous display device is described. The material comprises: a glass or vitroceramic substrate, a first layer deposited on one side of said substrate and essentially including at least one transparent conducting oxide (TCO), simple or mixed, doped or not, a second TCO layer of at least one transparent conducting oxide, simple or mixed, doped or not, hereafter called second TCO layer, both TCO layers being such that: the first TCO layer has a roughness of more than 1 nm and the second TCO layer has a roughness less than or equal to 1 nm, transmittance in the visible range of the product having both TCO layers is equal to at least 80%, the work function of the second TCO layer is greater than the work function of the first TCO layer and is greater than 4.6 eV and, preferably, greater than 4.8 eV. The first TCO layer is advantageously an indium oxide layer doped with tin (ITO) and the second TCO layer is a tin oxide layer doped with antimony (ATO). A luminous display devices, in particular to organic light emitting diodes incorporating these materials on their anode side is also described.

Description

[0001] related application [0002] This application claims priority from the following earlier application: French Patent Application No. 02-10865, filed September 3, 2002. The contents of these patent applications are incorporated herein by reference. technical field [0003] The present invention relates to materials used in the manufacture of light emitting display devices, more particularly organic light emitting diodes. The invention also relates to a display device incorporating this material, in particular an organic light-emitting diode incorporating this material, and a method of preparing said material. technical background [0004] Display devices, especially display screens, have been undergoing many developments recently. Organic Light Emitting Diodes, also known as OLEDs, a technology that offers a brighter, cheaper and more efficient display module, will undoubtedly become the basis for the next generation of light-emitting displays. This technology is sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/26H05B33/28H05B33/10C03C17/34C04B35/457H01L51/50H01L51/52H05B33/22
CPCC04B2235/3206C04B2235/444C04B35/457C03C17/3417C04B2235/3284C04B2235/3293H01L51/5206C04B2235/9653C04B2235/963C04B2235/3286H05B33/22C04B2235/3294C04B2235/96C04B2235/449C04B2235/445H05B33/28H01L51/5088C04B35/01H10K50/17H10K50/816H01J1/70H05B33/26H10K10/00
Inventor B·达马尼G·古斯曼J·普茨M·A·埃杰特
Owner CORNING INC
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