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RESEARCH GROUP


DR. KIM, Jin-Sang

Smart Electronic Materials Lab

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Thermoelectric Group of Electronic Material Research Center

Thermoelectricity has attracted a great attention for the waste energy scavenger and electrical cooler due to their ability of direct energy conversion between heat and electricity. Since thermoelectric device is based on solid-state operation without moving parts and bulk fluids, the devices are lightweight, small, and suitable for rapid heating or cooling. Now-a-days its application has been extended to extensively in fields such as space power generation and a variety of cooling applications. The energy conversion efficiency of a thermoelectric material is a function of its dimensionless figure of merit that is defined as ZT=S2sT/k, where S, s , k, and T are the material’s Seebeck coefficient, electrical conductivity, thermal conductivity, and ambient temperature, respectively. Recent efforts on enhancing ZT with nanostructured thermoelectric materials showed comparable or superior performance to bulk crystals with the same chemical compositions because of the dramatically reduced thermal conductivity due to phonon scattering at nano interfaces. However, scalable, practical manufacturing process are main hurdle for wide deployment of thermoelectric devices.
Our research group is interested in bismuth - telluride based thermoelectric materials with an emphasis on developing new synthetic approaches and understanding of fundamental issues of carrier transport mechanism.

Bismuth-telluride based thermoelectric materials
Growth of epitaxial thin film
Nano-structured thin film
Bulk nano-structured materials near room temperature applications
Computational simulation for measurement in ZT and electrical properties in bulk materials
Thermoelectric devices fabrication for applications

High Performance Thermoelectric Materials

High Performance Thermoelectric Materials 이미지

Modeling of Thermoelectric Phenomena

Modeling of Thermoelectric Phenomena 이미지

Thermoelectric Devices

Thermoelectric Devices 이미지

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