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Band-Gap Nonlinearity in Lead Chalcogenide ( PbQ, Q = Te, Se, S) Alloys

Journal Article


Abstract


  • Narrow band-gap lead chalcogenides have been developed

    for several optical and electronic applications. However, band-gap energies

    of the ternary and quaternary alloys have received little attention compared

    with the parent binary phases. Here, we have fabricated single-phase

    ternary (PbTe)1−x(PbSe)x and quaternary (PbTe)0.9−y(PbSe)0.1(PbS)y and

    (PbTe)0.65−z(PbSe)0.35(PbS)z alloys and shown that although lattice

    parameters follow Vegard’s law as a function of composition, the bandgap

    energies exhibit a substantial bowing effect. The ternary

    (PbTe)1−x(PbSe)x system features a smaller bowing parameter predominantly

    due to the difference in electronegativity between Se and Te,

    whereas the larger bowing parameters in quaternary alloys are generated

    from a larger crystal lattice mismatch and larger miscibility gap. These

    findings can lead to further advances in tuning the band-gap and lattice

    parameters for optical and electronic applications of lead chalcogenides.

UOW Authors


  •   Sima Aminorroaya-Yamini (external author)
  •   Patterson, Vaughan (external author)
  •   Santos, Joao Rafael (external author)

Publication Date


  • 2017

Citation


  • Aminorroaya-Yamini, S., Patterson, V. & Santos, R. (2017). Band-Gap Nonlinearity in Lead Chalcogenide ( PbQ, Q = Te, Se, S) Alloys. ACS Omega, 2 (7), 3417-3423.

Scopus Eid


  • 2-s2.0-85028935836

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2740

Number Of Pages


  • 6

Start Page


  • 3417

End Page


  • 3423

Volume


  • 2

Issue


  • 7

Place Of Publication


  • United States

Abstract


  • Narrow band-gap lead chalcogenides have been developed

    for several optical and electronic applications. However, band-gap energies

    of the ternary and quaternary alloys have received little attention compared

    with the parent binary phases. Here, we have fabricated single-phase

    ternary (PbTe)1−x(PbSe)x and quaternary (PbTe)0.9−y(PbSe)0.1(PbS)y and

    (PbTe)0.65−z(PbSe)0.35(PbS)z alloys and shown that although lattice

    parameters follow Vegard’s law as a function of composition, the bandgap

    energies exhibit a substantial bowing effect. The ternary

    (PbTe)1−x(PbSe)x system features a smaller bowing parameter predominantly

    due to the difference in electronegativity between Se and Te,

    whereas the larger bowing parameters in quaternary alloys are generated

    from a larger crystal lattice mismatch and larger miscibility gap. These

    findings can lead to further advances in tuning the band-gap and lattice

    parameters for optical and electronic applications of lead chalcogenides.

UOW Authors


  •   Sima Aminorroaya-Yamini (external author)
  •   Patterson, Vaughan (external author)
  •   Santos, Joao Rafael (external author)

Publication Date


  • 2017

Citation


  • Aminorroaya-Yamini, S., Patterson, V. & Santos, R. (2017). Band-Gap Nonlinearity in Lead Chalcogenide ( PbQ, Q = Te, Se, S) Alloys. ACS Omega, 2 (7), 3417-3423.

Scopus Eid


  • 2-s2.0-85028935836

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2740

Number Of Pages


  • 6

Start Page


  • 3417

End Page


  • 3423

Volume


  • 2

Issue


  • 7

Place Of Publication


  • United States