Design and discovery of a novel half-Heusler transparent hole conductor made of all-metallic heavy elements

Feng Yan, Xiuwen Zhang, Yonggang G. Yu, Liping Yu, Arpun Nagaraja, Thomas O. Mason, Alex Zunger

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

Transparent conductors combine two generally contradictory physical properties, but there are numerous applications where both functionalities are crucial. Previous searches focused on doping wide-gap metal oxides. Focusing instead on the family of 18 valence electron ternary ABX compounds that consist of elements A, B and X in 1:1:1 stoichiometry, we search theoretically for electronic structures that simultaneously lead to optical transparency while accommodating intrinsic defect structures that produce uncompensated free holes. This leads to the prediction of a stable, never before synthesized TaIrGe compound made of all-metal heavy atom compound. Laboratory synthesis then found it to be stable in the predicted crystal structure and p-type transparent conductor with a strong optical absorption peak at 3.36 eV and remarkably high hole mobility of 2,730 cm2V-1s-1 at room temperature. This methodology opens the way to future searches of transparent conductors in unexpected chemical groups.

Original languageEnglish
Article number7308
JournalNature communications
Volume6
DOIs
Publication statusPublished - Jun 24 2015

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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