physica status solidi (a) · 1986 · 74 citations · 14 references
Natural SciencesChemistryMaterials ScienceMaterials ChemistryMaterials PhysicsSpectroscopyAmorphous MaterialsAmorphous SolidsDefects In CeramicsDefects In Electronic MaterialsOptical GlassesSilicon MaterialsAmorphous OxidesAmorphous SiliconDefect-related LuminescenceDefects In Amorphous MaterialsIntrinsic DefectsQuartzSilicate GlassesSilicon Defects
The three dominant cathodoluminescence bands in amorphous SiO2 with maxima at 1.9, 2.7, and 4.3 cV are identical to bands seen in photoluminescence (PL) spectra of irradiated or oxygen-deficient amorphous SiO2. On the basis of the previous PL work these cathodoluminescence (CL) bands can be attributed to non-bridging oxygen (O01) and twofold coordinated silicon (Si01) centers. The CL excitation mechanism involves also ionic processes. The origin of the ubiquitous blue radioluminescence in undamaged α-quartz is different from that of the 2.7 eV band CL in amor-phous SiO2 or electron-damaged α-quartz. A strict correlation between the intensities of CL bands and concentrations of the pertinent defects does not exist.
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