Jump to main content
Jump to site search

Issue 35, 2015
Previous Article Next Article

High thermoelectric performance of a defect in α-In2Se3-based solid solution upon substitution of Zn for In

Author affiliations

Abstract

In this project, we have successfully manipulated the lattice defects in α-In2Se3-based solid solutions (In2−xZnxSe3) by appropriate substitution of Zn for In, via a non-equilibrium fabrication technology (NEFT) of materials. The manipulation of the defect centers involves reduction of the number of interstitial In atoms (Ini) and Se vacancies (VSe), and creation of a new antisite defect ZnIn as a donor. Through this technique, the lattice structure tends to be ordered, and also more stabilized than that of pure α-In2Se3. In the meantime, the carrier concentration (n) and mobility (μ) have increased by 1–2 orders of magnitude. As a consequence, the solid solution at x = 0.01 gives the highest TE figure of merit (ZT) of 1.23(±0.22) in the pressing direction at 916 K, which is about 4.7 times that of pure α-In2Se3 (ZT = 0.26). This achieved TE performance is mainly due to the remarkable improvement in the electrical conductivity from 0.53 × 103−1 m−1) at x = 0 to 4.88 × 103−1 m−1) at x = 0.01 at 916 K, in spite of the enhancement in the lattice thermal conductivity (κL) from 0.26 (W m−1 K−1) to 0.32 (W m−1 K−1).

Graphical abstract: High thermoelectric performance of a defect in α-In2Se3-based solid solution upon substitution of Zn for In

Back to tab navigation

Supplementary files

Publication details

The article was received on 02 Jul 2015, accepted on 27 Jul 2015 and first published on 27 Jul 2015


Article type: Paper
DOI: 10.1039/C5TC01977J
Author version
available:
Download author version (PDF)
J. Mater. Chem. C, 2015,3, 9069-9075

  •   Request permissions

    High thermoelectric performance of a defect in α-In2Se3-based solid solution upon substitution of Zn for In

    J. Cui, L. Wang, Z. Du, P. Ying and Y. Deng, J. Mater. Chem. C, 2015, 3, 9069
    DOI: 10.1039/C5TC01977J

Search articles by author

Spotlight

Advertisements