Thermoelectric Properties of Cu2Te Nanoparticle Incorporated N-Type Bi2Te2.7Se0.3

Yong Jae Jung, Hyun Sik Kim, Jong Ho Won, Minkyung Kim, Minji Kang, Eun Young Jang, Nguyen Vu Binh, Sang Il Kim, Kyoung Seok Moon, Jong Wook Roh, Woo Hyun Nam, Sang Mo Koo, Jong Min Oh, Jung Young Cho, Weon Ho Shin

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


To develop highly efficient thermoelectric materials, the generation of homogeneous heterostructures in a matrix is considered to mitigate the interdependency of the thermoelectric compartments. In this study, Cu2Te nanoparticles were introduced onto Bi2Te2.7Se0.3 n-type materials and their thermoelectric properties were investigated in terms of the amount of Cu2Te nanoparticles. A homogeneous dispersion of Cu2Te nanoparticles was obtained up to 0.4 wt.% Cu2Te, whereas the Cu2Te nanoparticles tended to agglomerate with each other at greater than 0.6 wt.% Cu2Te. The highest power factor was obtained under the optimal dispersion conditions (0.4 wt.% Cu2Te incorporation), which was considered to originate from the potential barrier on the interface between Cu2Te and Bi2Te2.7Se0.3 . The Cu2Te incorporation also reduced the lattice thermal conductivity, and the dimensionless figure of merit ZT was increased to 0.75 at 374 K for 0.4 wt.% Cu2Te incorporation compared with that of 0.65 at 425 K for pristine Bi2Te2.7Se0.3 . This approach could also be an effective means of controlling the temperature dependence of ZT, which could be modulated against target applications.

Original languageEnglish
Article number2284
Issue number6
StatePublished - 1 Mar 2022


  • CuTe
  • composite
  • n-type
  • thermoelectric


Dive into the research topics of 'Thermoelectric Properties of Cu2Te Nanoparticle Incorporated N-Type Bi2Te2.7Se0.3'. Together they form a unique fingerprint.

Cite this