Hybrid organic-inorganic Sb2Te3-doped PEDOT:PSS thermoelectric materials

CIC nanoGUNE Seminars

Kristina Ashurbekova
Post-doctoral Researcher, Nanomaterials, CIC nanoGUNE
nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian
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Hybrid organic-inorganic Sb2Te3-doped PEDOT:PSS thermoelectric materials

To ensure autonomy and best possible application versatility of future devices, the development of new organic-inorganic hybrid thermoelectric (TE) materials with a high Figure of Merit (ZT) can be a solution. Here, we are introducing new hybrid TE materials fabricated by vapor phase infiltration (VPI) of polymeric substrates with covalently bound organic/inorganic interfaces, obtained after growing Sb2Te3 inside the bulk of the semi-conducting polymer PEDOT:PSS. PEDOT:PSS is among the most investigated polymers in TE-based energy conversion, while the inorganic constituent, Sb2Te3, is one of the currently best p-type thermoelectric material for room temperature applications, such as Peltier elements in refrigerators and thermoelectric modules for waste heat recovery. For the VPI growth of Sb2Te3, SbCl3 and (Et3Si)2Te were used as precursors. A complete study of thermoelectric and electric transport properties of the hybrid materials over a temperature range of 293?450 K was performed with a lab-on-chip ZT test platform, which allowed the characterization of all in-plane parameters of the spin-coated and Sb2Te3- infiltrated PEDOT:PSS thin films and reference samples (ALD Sb2Te3 and PEDOT:PSS films).