Layered hybrid selenoantimonates with reduced thermal conductivity

Yu Chu Chen, Hongbin Yao, Suraj Thiagarajan, Min Wu, Thomas J. Emge, Ronggui Yang, Shuhong Yu, Jing Li

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Four ternary selenoantimonates, Ag2SbSe3(enH) (I), KCu2SbSe3 (II), Cu2SbSe3(pdaH 2)0.5 (III), and Cu2SbSe3(bdaH 2)0.5 (IV) (en = ethylenediamine, pda = propanediamine, bda = butanediamine) were synthesized by solvothermal reactions using amines as solvents. The structures consist of M/Sb (M = Cu, Ag) intermetallic layers connected by either protonated amines or potassium ions. The optical bandgaps of these compounds were estimated from their optical absorption spectra (Kubelka-Munk function) with the values ranging from 0.9 to 1.8 eV. Thermal conductivity measurements were carried out on I, III, and IV, as well as on related compounds Cu2SbSe3(en)0.5 and Cu 2SbSe3(en). In comparison with the inorganic counterpart compound CuSbSe2, the hybrid structures clearly show significantly reduced thermal conductivity, as a result of incorporation of inorganic-organic interface. The study demonstrates an effective approach to enhance the thermoelectric efficiency of such material systems.

Original languageEnglish
Pages (from-to)2604-2609
Number of pages6
JournalZeitschrift fur Anorganische und Allgemeine Chemie
Volume638
Issue number15
DOIs
Publication statusPublished - Dec 1 2012

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Keywords

  • Intermetallic
  • Selenoantimonate
  • Semiconductors
  • Thermal conductivity

ASJC Scopus subject areas

  • Inorganic Chemistry

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