In this section
@article{Stewart:2026:10.1002/aelm.202500731,
author = {Stewart, K and Tan, E and Kim, J and Kim, Y and Kim, J},
doi = {10.1002/aelm.202500731},
journal = {Advanced Electronic Materials},
title = {Polarons in DPP Polymers – How Glycol Side Chains and Elongated Conjugated Backbone Influence the Formation and Transport},
url = {http://dx.doi.org/10.1002/aelm.202500731},
year = {2026}
}
TY - JOUR
AB - <jats:title>ABSTRACT</jats:title> <jats:p>Understanding polaron formation in conjugated polymers is critical for advancing solidstate organic electronics. Here, we investigate diketopyrrolopyrrole (DPP)based polymers with tailored side chains to elucidate the impact of glycolation on charge transport and polaron formation. We demonstrate that glycol side chains enhance ptype character and charge carrier density, while backbone elongation improves planarity and mobility. Electrochemical doping using a semicrystalline solidstate ionic liquid (SSIL) can increase conductivity by four orders of magnitude. In situ fielddependent Raman spectroscopy probes polaron formation, showing increased πelectron redistribution in glycolated DPP. Polaron formation of the DPPTT conjugated backbone shows a more localised polaron with structural changes to the thiophene donor unit. Backbone elongation results in greater polaron delocalisation with lower reorganisation energy. Finally, iongel gated organic synaptic transistors (IGOSTs) demonstrate significant performance gains for glycolated polymers with gDPPTT and gDPPTTVT exhibiting strong excitatory postsynaptic currents. The more facile polaron formation pathway for gDPPTTVT offers a significant advantage in the dynamics of ion migration and retention. This work provides molecularlevel insight into the incorporation of glycol side chains to highperformance conjugated polymers for solidstate applications.</jats:p>
AU - Stewart,K
AU - Tan,E
AU - Kim,J
AU - Kim,Y
AU - Kim,J
DO - 10.1002/aelm.202500731
PY - 2026///
SN - 2199-160X
TI - Polarons in DPP Polymers – How Glycol Side Chains and Elongated Conjugated Backbone Influence the Formation and Transport
T2 - Advanced Electronic Materials
UR - http://dx.doi.org/10.1002/aelm.202500731
UR - https://doi.org/10.1002/aelm.202500731
ER -
