VIRTUAL: Department Seminar with Hyo Jae Yoon: Large-Area Molecular Thermoelectrics

Date(s) - 21 Sep 2020
3:00 PM - 4:00 PM


This is a webinar event.

Speaker: Hyo Jae Yoon, Associate Professor in the Department of Chemistry at Korea University (KU), Seoul, Korea

Title: Large-Area Molecular Thermoelectrics

Abstract: 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.

Bio: Hyo Jae Yoon is currently an Associate Professor in Department of Chemistry, Korea University (KU), Seoul, Korea. He received his B.S. degree (summa cum laude) in chemistry from Sogang University, Korea in 2005 and his Ph.D. degree in materials chemistry from Northwestern University, IL, USA in 2010. He was a postdoctoral researcher at Harvard University, USA until 2014. His research currently focuses on synthesis of organic/organometallic molecules and characterization of their electrical and thermoelectric properties for electronics and thermoelectrics applications. He was awarded with KU Graduate Student Achievement Award (2019, 2020), Excellent Teaching Award (2019), RSC ChemComm Emerging Investigator (2019), Army-commissioned Graduate Student Achievement Award by Chief of Staff of the KOR Army (2018), Samsung Science and Technology Foundation Research Grant (2018), Outstanding Research Award by the Korean Ministry of Education (2017), POSCO Chung-Am Science Young Investigator Fellowship (2015), IUPAC Young Chemist Travel Award (2015), Excellence in Graduate Research (2010), and ACS Inorganic Chemistry Division Student Travel Award (2009).

Seminar Host: Martin Thuo

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