Photoluminescence in powdered and bulk glassy GeSe2

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

Research output: Contribution to journalArticle

Abstract

Fatigue of photoluminescence (PL) at 77 K in GeSe2 powder obtained by grinding glassy samples has been observed. The intensity decreases by - 80% during 5 x 103 s. The peak positions of the PL spectra and their halfwidths for the powdered and bulk glassy GeSe2 coincide and have the values Ep=l 07eV and ∆ = 0 37eV respectively. The temperature dependence of Ep and ∆ as well as the PL-decay rate in the range 77-250 K is also reported. The results are interpreted as recombination of tightly bound charge pairs in Coulomb centres whose fields are modified by shallow traps.

Original languageEnglish
Pages (from-to)363-372
Number of pages10
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Volume41
Issue number4
DOIs
Publication statusPublished - 1980

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Photoluminescence
photoluminescence
grinding
Powders
decay rates
traps
Fatigue of materials
temperature dependence
Temperature

ASJC Scopus subject areas

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

Cite this

Photoluminescence in powdered and bulk glassy GeSe2 . / Koós, M.; Vassilyev, V. A.; Kósa Somogy, I.

In: Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties, Vol. 41, No. 4, 1980, p. 363-372.

Research output: Contribution to journalArticle

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