Cathodoluminescence spectrum-imaging of a gallium arsenide (GaAs) nanowire

Cathodoluminescence spectrum-imaging of a gallium arsenide (GaAs) nanowire
Data courtesy of Dr. U. Jahn, Paul-Drude-Institut für Festkörperelektronik.

(a) Secondary electron image of a 200 nm diameter GaAs nanowire; (b) Cathodoluminescence spectrum-image displaying energy plane 1.46 ± 0.02 eV; (c) Individual cathodoluminescence spectrum extracted from spectrum-image with single peak at 1.45 eV; (d) Map of central energy of luminescence; change in wavelength is associated with a transition from zincblende (1.425 eV) to wurtzite crystal structure; wurtzite phase is calculated to have 55 meV larger band gap than zincblende phase; (e) Map of FWHM along nanowire.

Cathodoluminescence spectrum imaging of polycrystalline diamond

Cathodoluminescence spectrum imaging of polycrystalline diamond
Data courtesy of Dr. E. Vicenzi, Smithsonian Institute

(a) Composite cathodoluminescence image of polycrystalline diamond created using red, green, and blue spectrally filtered cathodoluminescence images. Radioactive fluid ingress along grain boundaries leads to radiation halo effects being observed (yellow).

Defect imaging in semiconductors

Defect imaging in semiconductors

Cathodoluminescence image of a SiC wafer. Electrically active defects including stacking faults and dislocation networks are revealed due to enhanced non-radiative recombination occurring at these defects.

Revealing zonation in zircons

Revealing zonation in zircons

Cathodoluminescence image of a collection of zircon grains in a polished epoxy mount. Some zircons have igneous cores, some metamorphic zones, both of which are overprinted. Complimentary analysis by SHRIMP U-Pb suggests a long, complicated history of grain growth, dissolution, and re-growth over a period of about 2.5 billion years.

Cathodoluminescence image of reservoir quartz

Cathodoluminescence image of reservoir quartz

Cathodoluminescence image of a reservoir quartz polished thin section composed largely of detrital quartz and some k-feldspar with lowly luminescent, low temperature quartz cement (blue arrows). Several grains exhibit healed fractures (red arrows) and overgrowth generations (green arrows).

EBSD inverse pole figure map of copper sample

EBSD inverse pole figure map of copper sample
Data courtesy of Evans Analytical Group, Sunnyvale, CA

Through silicon via

Through silicon via
Data courtesy of the Fraunhofer Institute, Dresden, Germany (© 2013 Fraunhofer IZM, Dept. HDI&WLP/ASSID).

Backscattered electron image of 2.5 interposer structure prepared with Ilion II system.

Cathodoluminescence image of paint pigment

Cathodoluminescence image of paint pigment
Data courtesy of Prof. Nicholas Leventis, Chemistry Department, Missouri University of Science and Technology

Cathodoluminescence image of paint pigment sample prepared with Ilion II and imaged with MonoCL4™ system.

Polymer aerogel

Polymer aerogel

Electrical activity of grain boundaries in polycrystalline silicon solar cells

Electrical activity of grain boundaries in polycrystalline silicon solar cells
R. Johnson

A quantified EBIC map of a polycrystalline silicon solar cell. Several grain boundary segments are revealed to be electrically active (high recombination rate) and appear dark in the EBIC map (indicated by red arrows) while some appear to be electrically inactive (indicated by green arrow). Electrically active defects reduce the overall efficiency of the solar cell.

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