Photoluminescence of glassy and single-crystalline GeSe2 measured at 77K

V. A. Vassilyev, M. Koós, I. Kósa Samogyi

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Abstract

Photoluminescence (PL) and excitation (E) spectra of glassy and crystalline GeSe2 at 77 K have a broad-band peaked at energy ER<1 2Eg. PL spectra have a Gaussian form: the Stokes shift (WS=ℏω-ER) for crystalline GeSe2 is greater than that for the glass. The absorption coefficient α at the maxima of E spectra is ∼ 102cm-1 for the glassy form, and ∼ 104cm-1 for the crystalline form. The results are interpreted in terms of the Mott-Davis-Street model supposing a strong electron-phonon coupling in these types of amorphous semiconductors which explains the large Stokes shift and the broad emission band.

Original languageEnglish
Pages (from-to)633-636
Number of pages4
JournalSolid State Communications
Volume22
Issue number10
DOIs
Publication statusPublished - 1977

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Photoluminescence
Crystalline materials
photoluminescence
Amorphous semiconductors
amorphous semiconductors
streets
shift
absorptivity
broadband
Glass
Electrons
glass
excitation
electrons
energy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Photoluminescence of glassy and single-crystalline GeSe2 measured at 77K. / Vassilyev, V. A.; Koós, M.; Kósa Samogyi, I.

In: Solid State Communications, Vol. 22, No. 10, 1977, p. 633-636.

Research output: Contribution to journalArticle

Vassilyev, V. A. ; Koós, M. ; Kósa Samogyi, I. / Photoluminescence of glassy and single-crystalline GeSe2 measured at 77K. In: Solid State Communications. 1977 ; Vol. 22, No. 10. pp. 633-636.
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