Doped Conjugated Polymer Conductor for Stable High Conductivity
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Solution Overview
Problem
Conjugated polymeric compounds like PBTTT-C16 have low doping efficiency and conductivity due to instability, making them unsuitable for high-performance electronic devices.
Innovation Solution
A conductor material is developed by doping a conjugated polymeric compound with an electron donating group containing a heteroatom in a side chain using a dopant containing a nitrogen, boron, phosphorus, or antimony anion, and a counter cation, which enhances oxidation stability and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PBTTT-C16 is used as a conjugated polymeric compound for conductor material, then light weight and excellent moldability are achieved, but doping efficiency and conductivity are low due to easy reduction by heating
Solution Approach 1:
The patent changes the chemical structure parameters of the conjugated polymeric compound by introducing electron-donating groups (such as alkoxy groups) at specific positions (2,5-positions of thiophene rings) to enhance oxidation stability and prevent reduction, thereby resolving the contradiction between conductivity and compositional stability
Solution Approach 2:
The patent creates a composite doping system using a combination of F4-TCNQ as the primary dopant and additional electron-withdrawing groups as co-dopants, which synergistically improve doping efficiency and maintain high conductivity while preventing reduction, thus resolving the contradiction between reliability and stability
2Reliability
If conventional dopants are used with PBTTT-C16, then doping process is simple, but doping efficiency is low resulting in low conductivity
Solution Approach 1:
The patent modifies the dopant parameters by selecting F4-TCNQ with specific electron-withdrawing capabilities and optimizing the doping ratio to achieve high doping efficiency, thereby improving conductivity while maintaining ease of manufacture through a straightforward doping process
3Stability of the object's composition
If electron donating groups containing heteroatoms are introduced in side chains, then oxidation stability is enhanced and dedoping is suppressed, but molecular weight and processing complexity may increase
Solution Approach 1:
The patent applies local quality by introducing electron-donating groups only at specific strategic positions (2,5-positions of thiophene rings) rather than throughout the entire molecule, thereby achieving enhanced oxidation stability and suppressed dedoping while minimizing increases in molecular weight and processing complexity
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 resulting conductor material exhibits high conductivity, stability, and flexibility, suitable for lightweight, thin, and large-area electronic devices with reduced dedoping and cost, maintaining high performance over time.
Implementation Method 1
a conjugated polymeric compound having an electron donating group containing a heteroatom in a side chain is readily oxidized
Implementation Method 2
doping the conjugated polymeric compound having an electron donating group containing a heteroatom in a side chain with a dopant having a certain anion
Data Source
AI summary
Provided is a conductor material having high conductivity. The conductor material according to an embodiment of the present disclosure has a configuration in which a conjugated polymeric compound having an electron donating group containing a heteroatom in a side chain is doped with a dopant containing an anion selected from a nitrogen anion, a boron anion, a phosphorus anion and an antimony anion, and a counter cation. The anion is preferably an anion represented by Formula (1) below: where R1 and R2 are identical or different, and each represent an electron withdrawing group; and R1 and R2 may be bonded to each other to form a ring with an adjacent nitrogen atom.