119th General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Material Chemists
Room No. 402호
Time THU 10:10-:
Code MAT.O-8
Subject Effect of atomic substitution and doping on thermoelectric properties of polycrystalline SnSe material
Authors 이용규, 정인*
서울대학교 화학생물공학부, Korea
Abstract Thermoelectric power generation is in the focus of considerable attention because of the potential for environmentally benign and cost-effective conversion of waste heat to electricity. A single crystalline form of p-type SnSe has recently shown an exceptionally high ZT of ~2.6 at 923 K along the b-axis due to a highly anharmonic bonding. Since then polycrystalline SnSe based materials have been quite actively investigated for practical applications. However, it is quite difficult to make a high ZT polycrystalline SnSe material because of both low dopability and solubility limit with other elements. Thus, we investigated the effects of atomic substitution and doping on the thermoelectric properties of polycrystalline SnSe materials. In this study, we present detailed investigations of electrical and thermal transport measurement as well as structural data on polycrystalline SnSe based materials. Their thermoelectric properties are highly enhanced and its origin will be discussed.
E-mail jihwaja88@snu.ac.kr