Synthesis, structural characterisation and thermoelectric properties of Bi1-xPbxOCuSe

Son Dac Ngoc Luu, Paz Vaqueiro

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40 Citations (Scopus)

Abstract

The effect of Pb2+ doping on the structure and thermoelectric properties of BiOCuSe (also known as BiCuSeO or BiCuOSe) is described. With increasing Pb2+ content, the expansion of the unit cell results in a weakening of the bonding between the [Bi(2(1-x))Pb(2)xO(2)](2(1-x)+) and the [Cu2Se2](2(1-x)-) layers. The electrical resistivity and Seebeck coefficient decrease in a systematic way with growing Pb2+ levels. The thermal conductivity rises due to the increase of the electronic contribution with doping. The power factor of materials with a 4- 5% Pb2+ content takes values of ca. 8 mu W cm(-1) K-2 over a wide temperature range. ZT at 673 K is enhanced by ca. 50% when compared to values found for other dopants, such as Sr2+ or Mg2+.

Original languageEnglish
Pages (from-to)12270-12275
Number of pages6
JournalJournal of Materials Chemistry A
Volume1
Issue number39
DOIs
Publication statusPublished - 2013

Keywords

  • ELECTRONIC-STRUCTURES
  • OPTOELECTRONIC PROPERTIES
  • BICUSEO OXYSELENIDES
  • TRANSPORT-PROPERTIES
  • DOPED BICUSEO
  • CRYSTAL
  • LA
  • SE
  • CU
  • CH

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