Exciton confinement on a spherical shell: Visible photoluminescence from oxidized Si and Ge nanoballs

Yoshihiko Kanemitsu, Tetsuo Ogawa, Kenji Shiraishi, Kyozaburo Takeda

Research output: Contribution to journalArticle

7 Citations (Scopus)


We report strong visible photoluminescence (PL) at room temperature from oxidized Si and Ge nanoballs, which are composed of a spherical crystalline core and a surface oxide layer. To explain the experimental results, a model is proposed in which excitons are confined to a spherical shell, an interfacial layer between the crystalline core and the surface oxide layer, and in which the exciton confinement enhances the PL intensity.

Original languageEnglish
Pages (from-to)337-339
Number of pages3
JournalJournal of Luminescence
Issue numberC
Publication statusPublished - 1994 Apr


ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this