Exciton-phonon interaction in CuAlS2 powders

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

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

Abstract

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
Pages175-178
Number of pages4
Volume11-12
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
Volume11-12
ISSN (Print)10226680

Other

OtherAICAM 2005 - Asian International Conference on Advanced Materials
CountryChina
CityBeijing
Period05/11/305/11/5

Keywords

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

ASJC Scopus subject areas

  • Engineering(all)

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    Kuroki, Y., Osada, M., Kato, A., Okamoto, T., & Takata, M. (2006). Exciton-phonon interaction in CuAlS2 powders. In Advanced Materials Research (Vol. 11-12, pp. 175-178). (Advanced Materials Research; Vol. 11-12).