Exciton-phonon interaction in CuAlS2 powders

Y. Kuroki*, M. Osada, A. Kato, T. Okamoto, M. Takata

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


High-resolution photoluminescence (PL) measurement was carried out for copper aluminum disulfide (CuAlS2) powder at 12 K. Several sharp PL lines were observed in the range from 3.580 to 3.320 eV. The emission peaks at photon energies from 3.566 to 3.459 eV were attributed to free-exciton (FE) and bound-cxcitons (BE). The several weak emissions at below 3.476 eV were clarified to be phonon replicas (PR) by Raman scattering and in the viewpoint of exciton-phonon interaction. We observed the one, two and three-phonon replicas related to E(LO, TO) and B2(L.O, TO vibrational modes in chalcopyrite structure. It was suggested that the strong interaction between excitons and optical phonons took place in obtained CuAlS2 powder.

Original languageEnglish
Title of host publicationAdvanced Materials Research
Number of pages4
Publication statusPublished - 2006
Externally publishedYes
EventAICAM 2005 - Asian International Conference on Advanced Materials - Beijing, China
Duration: 2005 Nov 32005 Nov 5

Publication series

NameAdvanced Materials Research
ISSN (Print)10226680


OtherAICAM 2005 - Asian International Conference on Advanced Materials


  • Chalcopyrite
  • CuAlS
  • Exciton-phonon interaction
  • Photoluminescence
  • Raman spectroscopy

ASJC Scopus subject areas

  • Engineering(all)


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