Deep level defects in heteroepitaxial zinc selenide

Paul Besomi*, Bruce W Wessels

*Corresponding author for this work

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Deep level defects in epitaxially grown high-conductivity zinc selenide were investigated using transient capacitance spectroscopy. A total of seven electron traps was observed in Au/ZnSe Schottky diodes and ZnSe/GaAs n-p heterojunctions, having activation energies of 0.24, 0.33, 0.35, 0.42, 0.54, 0.71, and 0.86 eV, respectively. The emission rate, capture cross-section prefactor, and concentration of each trap are reported in this paper. Trap concentrations ranged from 1011 to 1014 cm-3 depending upon the epitaxial growth conditions. A defect model involving selenium vacancies and divacancies as well as deep donor impurities satisfactorily describes the variation of electron trap concentration with zinc/selenium ratio in the vapor phase.

Original languageEnglish (US)
Pages (from-to)3076-3084
Number of pages9
JournalJournal of Applied Physics
Volume53
Issue number4
DOIs
StatePublished - Dec 1 1982

Fingerprint

zinc selenides
traps
defects
selenium
Schottky diodes
absorption cross sections
heterojunctions
electrons
zinc
capacitance
vapor phases
activation energy
impurities
conductivity
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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abstract = "Deep level defects in epitaxially grown high-conductivity zinc selenide were investigated using transient capacitance spectroscopy. A total of seven electron traps was observed in Au/ZnSe Schottky diodes and ZnSe/GaAs n-p heterojunctions, having activation energies of 0.24, 0.33, 0.35, 0.42, 0.54, 0.71, and 0.86 eV, respectively. The emission rate, capture cross-section prefactor, and concentration of each trap are reported in this paper. Trap concentrations ranged from 1011 to 1014 cm-3 depending upon the epitaxial growth conditions. A defect model involving selenium vacancies and divacancies as well as deep donor impurities satisfactorily describes the variation of electron trap concentration with zinc/selenium ratio in the vapor phase.",
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Deep level defects in heteroepitaxial zinc selenide. / Besomi, Paul; Wessels, Bruce W.

In: Journal of Applied Physics, Vol. 53, No. 4, 01.12.1982, p. 3076-3084.

Research output: Contribution to journalArticle

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AU - Wessels, Bruce W

PY - 1982/12/1

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