Nanostructured SnSe: hydrothermal synthesis and disorder-induced enhancement of thermoelectric properties at medium temperatures

Wei Hao Chen, Zong Ren Yang, Fei Hung Lin, Chia-Jyi Liu

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Nanostructured SnSe was fabricated using hydrothermal methods followed by sintering in an evacuated-and-encapsulated ampoule. The effects of reaction temperature (150–170 °C), duration (6–12 h) and sintering temperature (450–580 °C) on the electronic transport are investigated. It is found that both the electrical conductivity and thermopower of hydrothermally synthesized and nanostructured SnSe increase with temperature and follow the variable range hopping process. As a result, disorder-induced improvement of electronic transport combined with low thermal conductivity on the pressed sample face perpendicular to the pressed direction leads to zT = 0.54 at 550 K for the sample sintered at 500 °C, demonstrating a significant improvement of zT value in the intermediate temperature range for the SnSe system.

Original languageEnglish
Pages (from-to)9728-9738
Number of pages11
JournalJournal of Materials Science
Volume52
Issue number16
DOIs
Publication statusPublished - 2017 Aug 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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