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Conducting redox polymers with non-activated charge transport properties
Li Yang1, Xiao Huang, Fikret Mamedov
1Department of Engineering Sciences, Uppsala University, Box 534, 75121 Uppsala, Sweden. martin.sjodin@angstrom.uu.se.
Physical Chemistry Chemical Physics : PCCP
|September 8, 2017
Summary
Charge transport in conducting polymers transitions from temperature-activated to residual scattering. This occurs even in disordered polymers, showing bulky groups don't hinder efficient charge transport.
Area of Science:
- Materials Science
- Polymer Chemistry
- Condensed Matter Physics
Background:
- Conducting polymers are crucial for electronic applications.
- Understanding charge transport mechanisms in polymers is key to optimizing their performance.
- Terephthalate-functionalized polymers offer unique redox properties.
Purpose of the Study:
- To investigate charge transport mechanisms in terephthalate-functionalized conducting redox polymers.
- To determine the influence of doping level on conduction mechanisms.
- To explore the role of polymer order in charge transport efficiency.
Main Methods:
- Synthesis of terephthalate-functionalized conducting redox polymers.
- Variable temperature electrical conductivity measurements.
- Crystallographic analysis to determine polymer order.
Main Results:
- Non-activated charge transport was observed, transitioning to residual scattering at higher doping levels.
- Residual scattering, typically seen in highly ordered materials, occurred in a predominantly amorphous polymer.
- Crystallographic data revealed interconnected crystalline domains within the amorphous matrix facilitating charge transport.
- Bulky pendant groups did not impede charge transport via the residual scattering mechanism.
Conclusions:
- Efficient charge transport via residual scattering is achievable in disordered conducting polymers.
- Interconnected crystalline domains can act as pathways for charge carriers in amorphous polymer matrices.
- The presence of bulky pendant groups does not necessarily hinder efficient charge transport in these systems.
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