Crystal growth and optical properties of CuAl(SxSe1-x)2 alloys

Sho Shirakata, Shigefusa Chichibu, Shigehiro Isomura

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5 Citations (Scopus)

Abstract

Single crystals of CuAl(SxSe1-x)2 alloys have been successfully grown by the chemical vapor transport method. Photoreflectance (PR) and photoluminescence (PL) measurements have been carried out at 77 K. From PR measurements, exciton energies (in eV) at 77 K have been obtained as a function of alloy composition x: EA = 3.546x + 2.736(1 - x) - 0.35x(1 - x), EB = 3.709x + 2.849(1 - x) - 0.39x(1 - x), EC = 3.692x + 3.012(1 - x) - 0.33x(1 - x). PL spectra are dominated by a broad emission band centered at 2.0eV, although weak exciton and edge emission (2.9eV) peaks have been observed for 0.84 ≤ x ≤ 0.96 and 0.68 ≤ x ≤ 0.96. respectively.

Original languageEnglish
Pages (from-to)6645-6649
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume36
Issue number11
Publication statusPublished - 1997 Nov 1
Externally publishedYes

Keywords

  • Chalcopyrite semiconductor
  • Chemical vapor transport
  • Photoluminescence
  • Photoreflectance
  • Single crystal of CuAl(SSe) alloy

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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