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Preparation of organic luminous device using organic material

An organic material and organic technology, applied in the field of organic light-emitting devices made of organic materials, can solve the problems of uneven heating, uneven sublimation or evaporation of organic materials, and achieve the effect of eliminating spraying and reducing volume

Inactive Publication Date: 2008-04-09
GLOBAL OLED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] Each or a combination of the above aspects of organic powders, flakes or granules may result in non-uniform heating of such organic materials in physical vapor deposition sources with concomitant spatially non-uniform sublimation or evaporate, and thus result in a potentially non-uniform vapor-deposited organic layer fabricated on the substrate

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  • Preparation of organic luminous device using organic material
  • Preparation of organic luminous device using organic material
  • Preparation of organic luminous device using organic material

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Embodiment Construction

[0056] The terms "powder" and "powdered" are used herein to denote a mass of individual particles, which may be flakes, granules or a mixture of various particle shapes.

[0057] The emissive layer (EML) of an OLED comprises an organic or organometallic material that produces light, called electroluminescence, due to electron-hole recombination in the layer. Hereafter, the term "organic" shall encompass both purely organic and organometallic materials. In the simplest structure of the prior art shown in FIG. 1 , an emissive layer 14 is sandwiched between an anode 12 and a cathode 15 . The emissive layer 14 may be a single pure material with high luminous efficiency. A well-known material for this purpose is 3(8-hydroxyquinolinone-N1,08)aluminum (Alq), which produces excellent green electroluminescence. Emissive layer 14 may also contain minor amounts of other materials, conventionally referred to as dopants, whose function is to alter the efficiency of electroluminescence (E...

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Abstract

A method of making an organic layer from an organic material on a substrate which will form part of an organic light-emitting device, including the steps of providing a sublimable organic material in a powder form; providing a thermally conductive and non-sublimable ceramic material in a powder form; forming a mixture of the sublimable organic material powder and thermally conductive and non-sublimable ceramic material powder; placing such mixture into a die and using a punch to apply sufficient pressure to the heated mixture to cause the mixture of powders to consolidate into a solid pellet; and removing the pellet from the die.

Description

technical field [0001] The present invention relates generally to methods for the manufacture of organic light-emitting devices (OLEDs), and in particular to the formation of solid wafers from powders of organic materials and the use of such wafers to form organic layers by physical vapor deposition on substrates which will form part of OLEDs improvement method. Background technique [0002] Organic light emitting devices, also known as organic electroluminescent (EL) devices, can be constructed by sandwiching two or more organic layers between first and second electrodes. [0003] In passive matrix OLEDs of conventional construction, a plurality of laterally spaced light transmissive anodes, such as indium-tin-oxide (ITO) anodes, are formed as the first electrode on a light transmissive substrate such as a glass substrate. Then, generally kept at less than 10 -3 Two or more organic layers are formed successively by physical vapor deposition of corresponding organic materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/56H05B33/10C23C14/12H10K99/00
CPCH01L51/56H01L51/0059H01L51/001C23C14/12H01L51/0081H10K71/164H10K85/631H10K85/324H10K71/40H10K71/30H05B33/10H10K71/00
Inventor S·K·高希D·B·卡尔顿T·K·哈特瓦S·A·范斯利克
Owner GLOBAL OLED TECH