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High efficiency electroluminous device

A luminescence and device technology, applied in the field of organic light-emitting diode electroluminescence devices, can solve the problems of high driving voltage and devices without EL characteristics

Active Publication Date: 2004-10-06
GLOBAL OLED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, these devices do not have good EL characteristics and usually have very high driving voltage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0226] Example 1-EL Device Preparation-Example of the Invention

[0227] Sample Preparation and Testing

[0228] EL devices satisfying the requirements of the present invention and comparative examples in the form of Samples 1-2 were constructed in the following manner:

[0229] A glass substrate coated with an 85 nm layer of indium tin oxide (ITO) as the anode was then sonicated in a commercial detergent, rinsed in deionized water, degreased in toluene vapor and exposed to oxygen plasma for about 1 min.

[0230] a) To ITO, through CHF 3 1nm fluorocarbon (CF x ) hole injection layer (HIL).

[0231] b) Then a hole-transporting layer (HTL ), with a thickness of 75nm.

[0232] c) Then deposit three (8-quinolinolate) aluminum (III) (Inv-23, 0-99.5wt%), 9,10,11,12-tetraphenyltetracene on the hole transport layer 37.5-65.8 nm LEL composed of (Inv-16, 0-99.5 wt%) and emitter-electroluminescent component Inv-1, (0.27-0.50 wt%). These materials are also evaporated from the t...

Embodiment 2

[0242] Example 2 - EL device preparation - the embodiment of the present invention

[0243] Sample Preparation and Testing

[0244] An EL device satisfying the requirements of the present invention and a comparative example as Sample 4 were constructed in the following manner:

[0245] A glass substrate coated with an 85 nm layer of indium tin oxide (ITO) as the anode was then sonicated in a commercial detergent, rinsed in deionized water, degreased in toluene vapor and exposed to oxygen plasma for about 1 min.

[0246] a) To ITO, through CHF 3 1nm fluorocarbon (CF x ) hole injection layer (HIL).

[0247] b) Then a hole-transporting layer (HTL ), with a thickness of 75nm.

[0248]c) Then deposit three (8-quinolinolate) aluminum (III) (Inv-23, 0-99.5wt%), 9,10,11,12-tetraphenyltetracene on the hole transport layer 37.5-67.2 nm LEL composed of (Inv-16, 0-99.5 wt%) and emitter-electroluminescent component Inv-1, (0.30-0.50 wt%). These materials are also evaporated from...

Embodiment 3

[0256] Example 3 - EL device preparation - the embodiment of the present invention

[0257] Sample Preparation and Testing

[0258] EL devices satisfying the requirements of the present invention and comparative examples serving as samples 5-8 were constructed in the following manner:

[0259] A glass substrate coated with an 85 nm layer of indium tin oxide (ITO) as the anode was then sonicated in a commercial detergent, rinsed in deionized water, degreased in toluene vapor and exposed to oxygen plasma for about 1 min.

[0260] a) To ITO, through CHF 3 1nm fluorocarbon (CF x ) hole injection layer (HIL).

[0261] b) Then a hole-transporting layer (HTL ), with a thickness of 75nm.

[0262] c) Then deposit three (8-quinolinolate) aluminum (III) (Inv-23, 0-99.5wt%), 9,10,11,12-tetraphenyltetracene on the hole transport layer 37.5-74.3 nm LEL composed of (Inv-16, 0-99.5 wt%) and emitter-electroluminescent component Inv-1, (0.30-0.50 wt%). These materials are also evapor...

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Abstract

Disclosed is an OLED device comprising a light emitting layer containing an electroluminescent component having a first bandgap and at least two non-electroluminescent components having second and further bandgaps, respectively, as more fully described in the summary of the invention.

Description

technical field [0001] The present invention relates to organic light emitting diode (OLED) electroluminescent (EL) devices, more particularly comprising a light emitting layer comprising at least one electroluminescent component and at least two non-electroluminescent components. Background technique [0002] Although organic electroluminescent (EL) devices have been known for over 20 years, their performance limitations have hindered many desired uses. In its simplest form, an organic EL device consists of an anode for hole injection, a cathode for electron injection, and an organic medium sandwiched between these electrodes to support charge recombination that produces light emission. These devices are also commonly referred to as organic light emitting diodes, or OLEDs. Typical examples of early organic EL devices are US 3,172,862 of Gurnee et al., authorized on March 9, 1965; US 3,173,050 of Gurnee, authorized on March 9, 1965; Dresner, "Double In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06H05B33/14H10K99/00
CPCC09K2211/1011C09K2211/1029H01L51/0059H01L51/0056H01L51/005H01L51/0084C09K2211/1007H05B33/14C09K11/06C09K2211/186C09K2211/1088C09K2211/1014H01L51/0081H10K85/60H10K85/624H10K85/631H10K85/341H10K85/324
Inventor C·T·布朗T·K·哈特瓦
Owner GLOBAL OLED TECH