Publication date: 21st July 2025
The design of novel transparent conducting polymers continues to attract considerable attention due to their versatility in optoelectronic technologies. In this work, we present a new class of bisEDOT-based polymers as promising alternatives to conventional PEDOT:PSS. Our strategy relies on the oxidative in situ polymerization of bis-EDOT, the dimer of 3,4-ethylenedioxythiophene, within a polymethyl methacrylate (PMMA) matrix using Cu(ClO₄)₂ as oxidant. This method produces uniform and highly transparent conducting films characterized by improved electrical conductivity, robust mechanical properties, and excellent processability. The resulting composites can be formulated as inks, enabling precise control over film thickness, tunable conductivity, and high optical transmittance across the visible and near-infrared regions. Importantly, the material is compatible with diverse solvents and additives, ensuring integration with perovskite-based devices. Performance assessments highlight superior charge-transport characteristics and enhanced long-term stability, establishing these polymers as strong candidates for hole-transport layers in tin- and lead-based perovskite solar cells. Beyond photovoltaics, the straightforward and scalable nature of this synthetic route broadens its applicability to flexible electronics, OLEDs, sensing platforms, and transparent electrodes. This approach thus represents a versatile pathway toward next-generation functional materials for energy and optoelectronic applications.
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