Organic Electronic Layer Structure With Interface Doping for Longer Life
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Solution Overview
Problem
Existing organic electronic components, such as organic transistors and light-emitting diodes, face challenges with the use of expensive p-type dopants that reduce service life despite improving charge transport and injection efficiency.
Innovation Solution
A layer architecture is introduced with a first layer doped with a fluorinated sulfonimide metal salt and a second undoped layer, forming an interface doping structure that enhances service life while maintaining efficiency, using a combination of matrix materials and dopants like Cu(TFSI)2.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If expensive p-type dopants are used to increase charge transport and injection efficiency, then component efficiency is improved, but service life is reduced
Solution Approach 1:
The patent applies local quality by creating an interface-doped layer where dopant is concentrated at the interface between the hole-injection layer and the light-emitting layer, rather than uniformly doping the entire layer. This localized doping approach maintains high charge injection efficiency at the critical interface while reducing overall dopant usage and extending service life.
Solution Approach 2:
The patent segments the hole-injection layer into two distinct regions: an interface-doped region adjacent to the light-emitting layer containing the dopant, and an undoped region away from the interface. This segmentation allows the doped region to provide efficient charge injection while the undoped region maintains stability and extends service life.
2Productivity
If p-doping is performed with lewis acids such as fluorinated sulfonimide metal salts, then charge injection efficiency is improved, but service life is significantly reduced
Solution Approach 1:
The patent uses fluorinated sulfonimide metal salts as dopants but applies them locally only at the interface region rather than throughout the entire hole-injection layer. This localized application maintains the beneficial charge injection efficiency while minimizing the harmful degradation effects that would occur with widespread doping.
3Productivity
If the entire hole-injection layer is doped, then charge transport is improved, but manufacturing cost increases due to expensive dopants
Solution Approach 1:
The patent segments the hole-injection layer into doped and undoped regions, requiring dopant application only in the interface region. This reduces the total amount of expensive dopant material needed compared to full-layer doping, thereby lowering manufacturing costs while maintaining sufficient charge transport efficiency.
Solution Approach 2:
The patent applies partial doping action by doping only the interface region rather than the entire layer. This partial approach is sufficient to achieve the required charge injection performance, eliminating the need for excessive dopant usage throughout the whole layer and reducing material costs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed layer structure significantly extends the service life of organic electronic components with reduced dopant usage, achieving comparable efficiency to fully doped components at lower costs.
Implementation Method 1
The first layer additionally has at least one dopant. The dopant is a fluorinated sulfonimide metal salt... In organic electronic components... charge transporting layers and/or charge injecting layers are required in order to ensure a stable charge transport and/or injection
Data Source
AI summary
The invention relates to an organic electronic component comprising a cathode, an anode, at least one light-emitting layer which is arranged between the anode and the cathode, a first layer, which comprises a first matrix material and a dopant, a second layer, which comprises a second matrix material, wherein the first layer is arranged between the second layer and the anode, wherein the second layer is arranged between the anode and the at least one light-emitting layer, wherein the dopant is a fluorinated sulfonimide metal salt of the following formula 1: