Growth and properties of transparent conducting CuAlO2 single crystals by a flux self-removal method

J. S. Yoon, Y. S. Nam, K. S. Baek, C. W. Park, H. L. Ju, S. K. Chang

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We investigated the growth and properties of CuAlO2 single crystals grown by a flux self-removal method. In this method, the flux crept up the wall of an alumina crucible completely during the slow cooling process, leaving flux-free CuAlO2 crystals on the bottom of the crucible. The resulting CuAlO2 crystals had typical dimensions of 0.5-5 mm in the ab-plane and 10-300 mm along the c-axis. The crystals had a hexagonal structure with a=b=2.857(1) Å and c=16.939(2) Å. Their resistivity was anisotropic with a c-axis resistivity (ρc) about ∼17 times higher than the ab-plane resistivity (ρab). However, both ρab and ρc showed thermally activated behavior with the same activation energy of ∼0.6 eV. The CuAlO2 crystals had direct and indirect bandgaps of 3.40 eV and 2.22 eV, respectively.

Original languageEnglish
Pages (from-to)31-34
Number of pages4
JournalJournal of Crystal Growth
Volume366
DOIs
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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