Deuterated Conductive Polymer Buffer Layer for OLEDs
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Solution Overview
Problem
There is a need for improved materials in organic electronic devices, particularly for the buffer layer in OLEDs, as existing electrically conductive polymers with low conductivity are not sufficient for optimal performance.
Innovation Solution
A composition comprising a deuterated electrically conductive polymer doped with a highly-fluorinated acid polymer or a non-fluorinated polymeric acid, which enhances conductivity and performance in organic electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrically conductive polymers are used in the buffer layer, then the device structure is simple and easy to manufacture, but the electrical conductivity is insufficient (10^-3 to 10^-7 S/cm) for optimal OLED performance
Solution Approach 1:
The patent applies parameter changes by deuterating the electrically conductive polymer (replacing hydrogen with deuterium) and using highly-fluorinated polymeric acids as dopants. These chemical parameter modifications significantly enhance the electrical conductivity of the buffer layer from the conventional 10^-3 to 10^-7 S/cm range to above 10^-1 S/cm, resolving the conductivity insufficiency while maintaining the polymer buffer layer structure
Solution Approach 2:
The patent creates a composite material system by combining deuterated electrically conductive polymers with highly-fluorinated polymeric acids. This composite approach synergistically improves conductivity through the deuterated polymer backbone and the highly-fluorinated acid dopant, achieving optimal buffer layer performance without requiring entirely different materials
2Productivity
If the buffer layer conductivity is increased to improve OLED performance, then the device efficiency improves, but the material synthesis and doping process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-synthesizing deuterated monomers before polymerization. This preliminary deuteration step simplifies the overall process by incorporating the conductivity-enhancing deuterium atoms directly into the polymer backbone during synthesis, rather than requiring complex post-polymerization modification steps
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 use of deuterated electrically conductive polymers doped with highly-fluorinated or non-fluorinated acid polymers improves the conductivity and efficiency of organic electronic devices, such as OLEDs, by forming a stable and effective buffer layer.
Implementation Method 1
a deuterated electrically conductive polymer doped with a highly-fluorinated acid polymer
Data Source
AI summary
The present invention relates to electrically conductive compositions, and their use in electronic devices. The composition includes either (1) a deuterated electrically conductive polymer doped with a highly-fluorinated acid polymer; or (2) (a) a deuterated electrically conductive polymer doped with a non-fluorinated polymeric acid and (b) at least one highly-fluorinated acid polymer.