Topic
Cathodoluminescence
About: Cathodoluminescence is a research topic. Over the lifetime, 8798 publications have been published within this topic receiving 153486 citations. The topic is also known as: cathode luminescence.
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TL;DR: In this article, the relationship between microstructure and luminescence efficiency for heteroepitaxial films of GaN grown on c-axis sapphire substrates by metalorganic chemical-vapor deposition was discussed.
Abstract: We discuss the relationship between microstructure and luminescence efficiency for heteroepitaxial films of GaN grown on c-axis sapphire substrates by metalorganic chemical-vapor deposition. We directly characterize the correlation between threading dislocations as observed by transmission electron microscopy, surface morphology as observed by atomic force microscopy, and wavelength-resolved cathodoluminescence imaging. We show that the inhomogeneity in the luminescence intensity of these films near band edge can be accounted for by a simple model where nonradiative recombination at threading dislocations causes a deficiency of minority carriers and results in dark regions of the epilayer. An upper bound for average diffusion length is estimated to be 250 nm.
512 citations
TL;DR: In this paper, high-purity cubic boron nitride (cBN) and hexagonal Boron Nitride (hBN) single crystals were synthesized at 4.5 GPa and 1500 C using barium BORON nitride as a solvent, and their band edge optical properties were measured by cathodoluminescence spectroscopy.
512 citations
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01 Jan 1994
TL;DR: In this paper, the basic physical properties phase diagrams electrical properties band structure optical functions infra-red absorption and impurity energy levels photoluminescence and cathodoluminecence Raman and reflection spectra interfaces including heterojunctions.
Abstract: Basic physical properties phase diagrams electrical properties band structure optical functions infra-red absorption and impurity energy levels photoluminescence and cathodoluminescence Raman and reflection spectra interfaces including heterojunctions.
482 citations
TL;DR: The structural and optical properties of three different kinds of GaAs nanowires with 100% zinc-blende structure and with an average of 30% and 70% wurtzite are presented in this paper.
Abstract: The structural and optical properties of three different kinds of GaAs nanowires with 100% zinc-blende structure and with an average of 30% and 70% wurtzite are presented. A variety of shorter and longer segments of zinc-blende or wurtzite crystal phases are observed by transmission electron microscopy in the nanowires. Sharp photoluminescence lines are observed with emission energies tuned from 1.515 eV down to 1.43 eV when the percentage of wurtzite is increased. The downward shift of the emission peaks can be understood by carrier confinement at the interfaces, in quantum wells and in random short period superlattices existent in these nanowires, assuming a staggered band offset between wurtzite and zinc-blende GaAs. The latter is confirmed also by time-resolved measurements. The extremely local nature of these optical transitions is evidenced also by cathodoluminescence measurements. Raman spectroscopy on single wires shows different strain conditions, depending on the wurtzite content which affects also the band alignments. Finally, the occurrence of the two crystallographic phases is discussed in thermodynamic terms.
457 citations
01 Jan 2000
TL;DR: In this article, the authors describe the use of the CLC-Method for the interpretation of U-Pb Zircon ages, with an example of an application to a study of Zircons from the Saxonian Granulite Complex, Germany.
Abstract: 1 Cathodoluminescence in Geosciences: An Introduction.- 2 Physical Parameters for the Identification of Luminescence Centres in Minerals.- 3 Information Encoded in Cathodoluminescence Emission Spectra.- 4 Importance of Instrumental and Experimental Factors on the Interpretation of Cathodoluminescence Data from Wide Band Gap Materials.- 5 Systematic Cathodoluminescence Spectral Analysis of Synthetic Doped Minerals: Anhydrite, Apatite, Calcite, Fluorite, Scheelite and Zircon.- 6 The Status of the Standards Program of the Society for Luminescence Microscopy and Spectroscopy.- 7 Geologic Application of Cathodoluminescence of Silicates.- 8 Cathodoluminescence Microcharacterisation of Silicon Dioxide Polymorphs.- 9 Brittle Deformation in Sandstone Diagenesis as Revealed by Scanned Cathodoluminescence Imaging with Application to Characterization of Fractured Reservoirs.- 10 High-Resolution Cathodoluminescence Studies of Feldspar Minerals.- 11 Application of Cathodoluminescence to Carbonate Diagenesis.- 12 Cathodoluminescence of Carbonate Shells: Biochemical vs Diagenetic Process.- 13 Quantitative High Resolution Spectral Analysis of Mn2+ in Sedimentary Calcite.- 14 Systems of Interacting Luminescence Centers in Natural Diamonds: Laser-Induced Time-Resolved and Cathodoluminescence Spectroscopy.- 15 Use of Cathodoluminescence for U-Pb Zircon Dating by Ion Microprobe: Some Examples from the Western Alps.- 16 A Combination of Single Zircon Dating by TIMS and Cathodoluminescence Investigations on the Same Grain: The CLC-Method - U-Pb Geochronology For Metamorphic Rocks.- 17 Relevance of Cathodoluminescence for the Interpretation of U-Pb Zircon Ages, with an Example of an Application to a Study of Zircons from the Saxonian Granulite Complex, Germany.- 18 Cathodoluminescence in Applied Geosciences.- 19 Cathodoluminescence as a Tool in Gemstone Identification.
452 citations