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Polymeric boron compounds and use thereof in organic light-emitting diodes

A light-emitting diode and organic technology, applied in the direction of light-emitting materials, chemical instruments and methods, electrical components, etc., can solve the problems of reduced luminous density, poor charge transfer performance, etc., and achieve the effect of optimizing share and optimizing efficiency

Active Publication Date: 2012-11-14
OSRAM OLED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Irreversible chemical degradation in the process leads to poor charge transfer performance and a decrease in luminous density

Method used

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Experimental program
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Embodiment approach

[0017] According to one embodiment, the triarylated Lewis unit in the organic semiconductor material exhibits blue emission, or it has no appreciable effect on the emission spectrum (shift less than 30 nm).

[0018] According to one embodiment of the invention, the triarylated Lewis acid unit is substituted with an electron donor such that a chromophore center is created and shifts the chromophore to long wavelengths.

[0019] In a very advantageous embodiment of the invention, triarylamine units and triarylborane units are combined in the organic semiconducting material of at least one active layer, so that the efficiency and working life are optimized according to certain driver conditions, for example in Optimized for passive matrix controllers for a given multiplexing rate, pulse frequency and / or brightness.

[0020] According to the invention, the use of triarylborane-electron transport units can optimize the share of charge carriers on the total current and thus optimize...

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Abstract

The invention relates to an organic light-emitting diode (OLED) featuring an increased service life and improved transport of negative charge carriers. Said organic light-emitting diode is based on an organic semiconducting material in which the transport of negative charge carriers and stability regarding reduction are determined by means of triarylated Lewis acid units, particularly perarylatedborane units. This results in an improved service life of the emissive layer, which increases the service life of the component while dispensing with the need to readjust brightness during operation.The invention further relates to such organic light-emitting diodes in which the position of the emitter region in the emitter layer and the emission color can be influenced in a specific manner withthe aid of triarylated Lewis acids such as perarylated borane units.

Description

technical field [0001] The present invention relates to an organic light emitting diode (OLED) with improved lifetime and improved charge carrier transport. Background technique [0002] OLEDs based on semiconducting materials are known, for example with polyarylene-vinylen (Polyarylenvinylen) or polyparaphenylene (Polyparaphenylene) (especially polyfluorene Polyfluoren and / or polyspirofluorene Poly-spiro-fluoren) Substrates in which, in addition to these components, a part of other chromophores and / or triarylamine derivatives has been polymerized or incorporated in the form of a mixture. Chromophores generally produce intense long-wavelength, ie predominantly green or red, emission bands in the resulting electroluminescence spectrum. Triarylamine units generally have a minor impact on the emission bands of organic light-emitting diodes and are mainly used for positive charge transport through paired polymer chains, and / or for oxidation stability of organic semiconductor ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/30H10K99/00
CPCH01L51/0079H01L51/002H01L51/0038H01L51/5052H01L51/0035H10K71/30H10K85/111H10K85/114H10K85/321H10K50/165C09K11/06H10K50/00
Inventor K·霍伊泽尔A·洪策A·卡尼茨W·罗格勒D·亨泽勒尔
Owner OSRAM OLED