Electrical contact properties of semiconducting chalcogenide glasses

A. M. Wallace, A. E. Owen, J. M. Robertson

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Measurements of the d.c. conductivity of radio-frequency sputtered thin films of a Ge-As-Te chalcogenide glass, sandwiched between a variety of metallic electrodes, indicate the absence of any blocking barrier associated with the metal-amorphous semiconductor contact, except when an oxidizing electrode such as Al is used. These results are confirmed by measurements of the capacitance and a.c. conductance as a function of frequency and are analysed in terms of a model of the metal-amorphous semiconductor contact in which transport occurs by a parallel combination of thermionic field emission, band-to-band recombination/generation via localized gap states, and tunnelling at the Fermi level followed by thermal excitation into the conduction band. Calculations show that recombination/generation is the dominant mechanism of transport across the contact.

Original languageEnglish (US)
Pages (from-to)57-70
Number of pages14
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Volume38
Issue number1
DOIs
StatePublished - 1978
Externally publishedYes

Fingerprint

Semiconducting glass
Amorphous semiconductors
amorphous semiconductors
electric contacts
Metals
Thermionic emission
Electrodes
electrodes
glass
thermionic emission
Fermi level
Conduction bands
Field emission
metals
field emission
radio frequencies
conduction bands
Capacitance
capacitance
Glass

ASJC Scopus subject areas

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

Cite this

Electrical contact properties of semiconducting chalcogenide glasses. / Wallace, A. M.; Owen, A. E.; Robertson, J. M.

In: Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties, Vol. 38, No. 1, 1978, p. 57-70.

Research output: Contribution to journalArticle

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