An important goal in the field of organic thermoelectrics is to relate thermoelectric performance of devices to the chemical and electronic structures of active organic components inside the devices on a molecular scale. Molecular-level thermoelectric studies with electrode-molecule-electrode junctions can help to achieve this goal. This presentation describes a new, efficient approach for large-area thermoelectric characterization of self-assembled monolayers using eutectic Ga-In (EGaIn) alloy. A cone-shaped EGaIn microelectrode permits access to noninvasive and reversible thermoelectric top-contacts over delicate organic surface of monolayers in ambient conditions. With this large-area thermoelectric measurement platform, we investigate thermoelectric characteristics of molecular junctions, varying one component in junction while keeping others constant. Such a physical-organic approach enables us to draw interesting and statistically meaningful inferences on structure-thermopower relationships.

Large-area molecular thermoelectrics

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.