Room-temperature photoreflectance of CuAlxGa1-xSe2 alloys

Sho Shirakata, Shigefusa Chichibu, Shigehiro Isomura

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Photoreflectance (PR) spectra have been measured at room temperature for single crystals of CuAlxGa1-xSe2 alloys grown by the chemical vapor transport method. Exciton transition energies related to valence-to-conduction bands at room temperature (EA, EB and EC in eV) have been determined as a function of composition as EA = 2.654x + 1.674(1 - x) - 0.22x(1 - x), EB = 2.767x + 1.749(1 - x) - 0.17x(1 - x) and EC = 2.923x + 1.972(1 - x) - 0.32x(1 - x). The PR results are discussed in terms of PL spectra.

Original languageEnglish
Pages (from-to)7160-7161
Number of pages2
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number12 A
Publication statusPublished - 1997 Dec
Externally publishedYes


  • Alloy semiconductor
  • Chalcopyrite semiconductor
  • Modulation spectroscopy
  • Photoreflectance
  • Single crystal of CuAlGaSe

ASJC Scopus subject areas

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


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