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Facile and time-resolved chemical growth of nanoporous CaxCoO2 thin films for flexible and thermoelectric applications
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Facile and time-resolved chemical growth of nanoporous CaxCoO2 thin films for flexible and thermoelectric applications
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Facile and time-resolved chemical growth of nanoporous CaxCoO2 thin films for flexible and thermoelectric applications
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Paper
Facile and time-resolved chemical growth of nanoporous CaxCoO2 thin films for flexible and thermoelectric applications
2019
Overview
CaxCoO2 thin films can be promising for widespread flexible thermoelectric applications in a wide temperature range from room-temperature self-powered wearable applications (by harvesting power from body heat) to energy harvesting from hot surfaces (e.g., hot pipes) if a cost-effective and facile growth technique is developed. Here, we demonstrate a time resolved, facile and ligand-free soft chemical method for the growth of nanoporous Ca0.35CoO2 thin films on sapphire and mica substrates from a water-based precursor ink, composed of in-situ prepared Ca2+-DMF and Co2+-DMF complexes. Mica serves as flexible substrate as well as sacrificial layer for film transfer. The grown films are oriented and can sustain bending stress until a bending radius of 15 mm. Despite the presence of nanopores, the power factor of Ca0.35CoO2 film is found to be as high as 0.50 x 10-4 Wm-1K-2 near room temperature. The present technique, being simple and fast to be potentially suitable for cost-effective industrial upscaling.
Publisher
Cornell University Library, arXiv.org
Subject
