Molecularly Hybridized Conduction in DPP-Based Donor-Acceptor Copolymers toward High-Performance Iono-Electronics.

Area of Science:

• Materials Science
• Polymer Chemistry
• Organic Electronics

Background:

• Iono-electronics require mixed ionic-electronic conductors (MIECs) for signal transduction.
• Designing polymer MIECs with polar sidechains is common, but the optimal balance between ion and charge transport remains undefined.
• Understanding this balance is crucial for high-performance materials.

Purpose of the Study:

• To investigate the impact of molecularly hybridizing ion permeability and charge mobility in semiconducting polymers.
• To explore how controlling polar sidechain density affects performance in electrochemical and synaptic transistors.
• To develop novel organic mixed ionic-electronic conductors with enhanced properties.

Main Methods:

• Synthesis of diketopyrrolopyrrole (DPP)-based copolymers with varying polar sidechain densities.
• Fabrication and characterization of electrochemical and synaptic transistors using these copolymers.
• Evaluation of ion insertion, retention, and charge transport properties.

Main Results:

• Demonstrated multifunctionality in DPP-based copolymers by controlling polar sidechain density.
• Achieved efficient electrochemical signal transduction and reliable synaptic plasticity through controlled ion transport.
• Exhibited unprecedented thermal tolerance in the newly designed organic MIECs.

Conclusions:

• Molecular hybridization of ion and charge transport in semiconducting polymers is key for high-performance iono-electronic devices.
• DPP-based copolymers offer a versatile platform for tuning iono-electronic properties.
• These materials show promise for advanced organic electronics due to their performance and thermal stability.