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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.


Papers
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Journal ArticleDOI
TL;DR: The spatial dependence of the luminescence intensities at the band edge (364 nm) and at the defect-band (centered at 560 nm) regions for epitaxial GaN films have been studied using cathodoluminescence microscopy at room temperature.
Abstract: The spatial dependence of the luminescence intensities at the band edge (364 nm) and at the ‘‘yellow’’ defect‐band (centered at 560 nm) regions for epitaxial GaN films have been studied using cathodoluminescence microscopy at room temperature. The films were grown by metalorganic chemical vapor deposition on (0001) sapphire substrates and were not intentionally doped. Significant nonuniformities in the band‐to‐band and in the yellow band emissions were observed. Yellow luminescence in small crystallites appears to originate from extended defects inside the grains and at low‐angle grain boundaries. The size of band‐to‐band emission sites correlates with low‐angle grain sizes observed by transmission electron microscopy.

362 citations

Journal ArticleDOI
TL;DR: In this article, a spatially resolved cathodoluminescence (CL) spectrum mapping revealed a strong exciton localization in InGaN single-quantum-wells (SQWs).
Abstract: Spatially resolved cathodoluminescence (CL) spectrum mapping revealed a strong exciton localization in InGaN single-quantum-wells (SQWs). Transmission electron micrographs exhibited a well-organized SQW structure having abrupt InGaN/GaN heterointerfaces. However, comparison between atomic force microscopy images for GaN-capped and uncapped SQWs indicated areas of InN-rich material, which are about 20 nm in lateral size. The CL images taken at the higher and lower energy side of the spatially integrated CL peak consisted of emissions from complementary real spaces, and the area was smaller than 60 nm in lateral size.

360 citations

Journal ArticleDOI
TL;DR: In this paper, a series of novel Eu3+-activated NaBiF4 nanoparticles were synthesized by an ultra-fast chemical precipitate method at room temperature.

344 citations

Patent
03 Nov 1988
TL;DR: In this paper, a micropoint emissive cathodes and display means by cathodoluminescence excited by field emission and using said source were described. But the display means consisted of a cathode (16) facing the source.
Abstract: Electron source with micropoint emissive cathodes and display means by cathodoluminescence excited by field emission and using said source. Each cathode (5) comprises an electrically conductive layer (22) and micropoints (12) and, according to the invention, a continuous resistive layer (24) is provided between the conductive layer and the micropoints. The display means comprises a cathodoluminescent anode (16) facing the source.

340 citations

Journal ArticleDOI
TL;DR: This work identifies a new extremely bright UV single photon emitter in hexagonal boron nitride by employing an original experimental setup coupling cathodoluminescence within a scanning transmission electron microscope to a Hanbury-Brown-Twiss intensity interferometer.
Abstract: To date, quantum sources in the ultraviolet (UV) spectral region have been obtained only in semiconductor quantum dots. Color centers in wide bandgap materials may represent a more effective alternative. However, the quest for UV quantum emitters in bulk crystals faces the difficulty of combining an efficient UV excitation/detection optical setup with the capability of addressing individual color centers in potentially highly defective materials. In this work we overcome this limit by employing an original experimental setup coupling cathodoluminescence within a scanning transmission electron microscope to a Hanbury–Brown–Twiss intensity interferometer. We identify a new extremely bright UV single photon emitter (4.1 eV) in hexagonal boron nitride. Hyperspectral cathodoluminescence maps show a high spatial localization of the emission (∼80 nm) and a typical zero-phonon line plus phonon replica spectroscopic signature, indicating a point defect origin, most likely carbon substitutional at nitrogen sites. A...

333 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023140
2022300
2021209
2020254
2019265
2018205