Low-Temperature Cathodoluminescence in Disordered ${\rm SiO}_{2}$

Evans, Amberly; Dennison, John; Wilson, Gregory; Dekany, Justin

doi:10.1109/tps.2013.2291873

IEEE Trans. Plasma Sci.

2014

DOI: 10.1109/tps.2013.2291873

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Low-Temperature Cathodoluminescence in Disordered ${\rm SiO}_{2}$

Amberly Evans

John Dennison

Gregory Wilson

et al.

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Cited by 2 publications

References 9 publications

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Cathodoluminescence studies of defects in coated boron nitride

Guerch¹,

Dekany²,

Dennison³

et al. 2017

J. Phys. D: Appl. Phys.

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Optical emission properties of boron nitride (BN) substrates, BN with alumina (A!iO3) coating, and thermally-annealed alumina-coated boron nitride (an-BN/A!iO3) were investigated under electron irradiation using cathodoluminescence (CL) measurements. Tests were performed, temperatures ranging from-lO0K to-300 K, with monoenergetic beams from 5 keV to 30keV, and electron flux densities f r om I nA • cm-2 to 500 nA • cm-2. These experiments were conducted to identify the effects of coating and thermal annealing on the nature and occupation of defect states in different samples with BN substrates. Previous studies have shown that these treatments can limit the charging of BN substrates. Consequently, thorough investigations of electron trapping and recombination processes as a fonction of low temperature, dose and charging/discharge were performed in order to explain the differences of electrical behaviour and compare the CL spectra of the three different samples studied. Broad features associated with the BN and sharper features resulting f r om the annealed alumina coating were observed. Changes in the intensity, energy, and width of the features with sample l r eatments were observed. Dif f erent incident beam parameters were used to associate these features with specific types of defect states. The effects of charging, temperature-and dose-dependent conductivity, and thermal annealing and aging of the samples on the CL spectra were investigated. These were used to study defect creation and occupation and to understand the predominant physical mechanisms and main structural and chemical differences between these ceramic configurations.

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Cathodoluminescence studies of defects in coated boron nitride

Guerch¹,

Dekany²,

Dennison³

et al. 2017

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

Analysis of Cathodoluminescence Behavior of Fluoropolymers

Demol

Paulmier

Payan

2023

IEEE Trans. Plasma Sci.

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Low-Temperature Cathodoluminescence in Disordered ${\rm SiO}_{2}$

Cited by 2 publications

References 9 publications

Cathodoluminescence studies of defects in coated boron nitride

Cathodoluminescence studies of defects in coated boron nitride

Analysis of Cathodoluminescence Behavior of Fluoropolymers

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