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arXiv · 2401.09276

Wafer-scale fabrication of mesoporous silicon functionalized with electrically conductive polymers

Manfred May·Mathis Boderius·Natalia Gostkowska-Lekner·Mark Busch·Klaus Habicht·Tommy Hofmann·Patrick Huber
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Abstract

The fabrication of hybrid materials consisting of nanoporous hosts with conductive polymers is a challenging task, since the extreme spatial confinement often conflicts with the stringent physico-chemical requirements for polymerization of organic constituents. Here, several low-threshold and scalable synthesis routes for such hybrids are presented. First, the electrochemical synthesis of composites based on mesoporous silicon (pore size of 7 nm) and the polymers PANI, PPy and PEDOT is discussed and validated by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). Polymer filling degrees of 74% are achieved. Second, the production of PEDOT/pSi hybrids, based on the solid-state polymerization (SSP) of DBEDOT to PEDOT is shown. The resulting amorphous structure of the nanopore-embedded PEDOT is investigated via in-situ synchrotron-based X-ray scattering. In addition, a twofold increase in the electrical conductivity of the hybrid compared to the porous silicon host is shown, making this system particularly promising for thermoelectric applications.

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Manfred May, Mathis Boderius, Natalia Gostkowska-Lekner, Mark Busch, Klaus Habicht, Tommy Hofmann, Patrick Huber. 2024-01-17. Wafer-scale fabrication of mesoporous silicon functionalized with electrically conductive polymers. https://doi.org/10.1016/j.micromeso.2024.113181

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