Publication date: 15th December 2025
The electrical conductivity and elastic modulus of doped conjugated polymers tend to increase in
tandem, which complicates the design of soft conductors. This work investigates how different dopant
counterions influence the electrical and mechanical properties of a thienothiophene copolymer with
triethylene glycol side chains. Sequential doping and proton-coupled electron-transfer were used to
prepare samples with a comparable oxidation level neutralized with different counterions. Highly
oxidized films featured a comparable electrical conductivity of about 100 S cm-1 irrespective of the
counterion size. Dynamic mechanical analysis revealed that the choice of counterion strongly impacts
the sub-glass transition temperature, which varied from -44 to -3 ºC. As a result, the elastic modulus
at room temperature ranged from 0.05 to 0.7 GPa for materials with a comparable oxidation level.
Evidently, it is possible to decouple the electrical and mechanical properties of doped polymers,
which are governed by charge transport along the backbone and side-chain relaxation, respectively.
This insight opens up new opportunities for the design of soft conductors and more sustainable
bioelectronic and wearable devices whose various soft and rigid components could be created with the
same polymer.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.