Thermoelectric properties of SrTiO3 nano-particles dispersed indium selenide bulk composites

Min Ho Lee, Jong Soo Rhyee, Mohammad Vaseem, Yoon Bong Hahn, Su Dong Park, Hee Jin Kim, Sung Jin Kim, Hyeung Jin Lee, Chilsung Kim

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26 Scopus citations


We investigated the thermoelectric properties of the InSe, InSe/In 4Se3 composite, and SrTiO3 (STO) nano-particles dispersed InSe/In4Se3 bulk composites. The electrical conductivity of the InSe/In4Se3 composite with self-assembled phase separation is significantly increased compared with those of InSe and In4Se3-δ implying the enhancement of surface conductivity between grain boundaries. The thermal conductivity of InSe/In4Se3 composite is decreased compared to those of InSe. When the STO nano-particle dispersion was employed in the InSe/In 4Se3 composite, a coherent interface was observed between nano-particle precipitates and the InSe bulk matrix with a reduction of the thermal conductivity.

Original languageEnglish
Article number223901
JournalApplied Physics Letters
Issue number22
StatePublished - 3 Jun 2013

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program (2011-0021335), the Nano-Material Technology Development Program (2011-0030147), the Mid-Career Research Program (Strategy) (No. 2012R1A2A1A03005174) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology, and a grant from the Energy Efficiency & Resources program of the Korea Institute of Energy Technology Evaluation Planning (KETEP) funded by the Korea government Ministry of Knowledge Economy (No. 20112010100100), and SK Innovation.


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