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The fabrication of hybrid materials consisting of nanoporous hosts withconductive polymers is a challenging task, since the extreme spatialconfinement often conflicts with the stringent physico-chemical requirementsfor polymerization of organic constituents. Here, several low-threshold andscalable synthesis routes for such hybrids are presented. First, theelectrochemical synthesis of composites based on mesoporous silicon (pore sizeof 7 nm) and the polymers PANI, PPy and PEDOT is discussed and validated byscanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy(EDX). Polymer filling degrees of 74% are achieved. Second, the production ofPEDOT/pSi hybrids, based on the solid-state polymerization (SSP) of DBEDOT toPEDOT is shown. The resulting amorphous structure of the nanopore-embeddedPEDOT is investigated via in-situ synchrotron-based X-ray scattering. Inaddition, a twofold increase in the electrical conductivity of the hybridcompared to the porous silicon host is shown, making this system particularlypromising for thermoelectric applications.

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