Deep Ultraviolet Leds
Deep Ultraviolet Leds - Related Videos
09:21
Ultraviolet-Visible (UV-Vis) Spectroscopy
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Ultraviolet-visible (UV-Vis) spectroscopy is one of the most popular analytical techniques because it is very versatile and able to detect nearly every molecule. With UV-Vis spectroscopy, the UV-Vis light is passed through a sample and the transmittance of light by a sample is measured. From the transmittance (T), the absorbance can be calculated as A=-log (T). An absorbance spectrum is obtained that shows the absorbance of a...
07:40
Using Affordable LED Arrays for Photo-Stimulation of Neurons
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Cited by 7 •
2011
Adult-born neurons expressing ChR2 can be manipulated in slice electrophysiological preparations in order to examine their contribution towards the function of olfactory neural circuits.
09:31
High-Speed Ultraviolet Photoacoustic Microscopy for Histological Imaging with Virtual-Staining assisted by Deep Learning
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Cited by 1 •
2022
A high-speed and open-top ultraviolet photoacoustic microscope that can provide histological images intraoperatively for surgical margin analysis is demonstrated, including the system configuration, optical alignment, sample preparation, and experimental procedures.
01:02
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
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2024
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material, molecules absorb light depending on the energy required for electronic transitions. As a result...
03:22
Deep-Tissue Imaging of a Zebrafish Brain Using a Three-Photon Fluorescence Microscope
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2025
Source: Hontani, Y., et al. Deep-Tissue Three-Photon Fluorescence Microscopy in Intact Mouse and Zebrafish Brain. J. Vis. Exp. (2022)This video demonstrates the setup and execution of three-photon imaging in an anesthetized zebrafish brain. The protocol enables deep-tissue visualization of fluorescently labeled neurons, revealing real-time neuronal activity and structures for neuroscience research applications.
FAQs
Changing the alloy composition changes the semiconductor band gap, which sets the energy released when injected electrons and holes recombine in the active region. This band-gap relationship determines photon wavelength. Engineers can therefore adjust the AlGaN composition to target different ultraviolet emission ranges while coordinating the material choice with device structure and performance requirements.
Electrical contacts deliver current so electrons and holes enter the active region, where their recombination produces photons. The surrounding device layers help determine how effectively that process occurs and how the device behaves during operation. Engineering these elements together affects emission wavelength, efficiency, and operating stability rather than treating the light-emitting region in isolation.
Heat management is important because engineering choices influence operating stability as well as efficiency and emission behavior. Thermal design is therefore considered alongside the semiconductor composition, layers, and contacts. This coordinated approach supports development goals such as higher output power, longer lifetime, and improved energy efficiency, all of which remain important challenges for DUV LED systems.
Deep Ultraviolet Leds provide compact, mercury-free ultraviolet illumination for surface and water disinfection applications. Their emission characteristics can be engineered through the semiconductor material and device design, while output power, stability, and energy efficiency influence practical system development. These features make them relevant where disinfection equipment requires an alternative to conventional mercury-based illumination sources.
Wavelength-controlled DUV LED output supports fluorescence sensing and spectroscopy, where the illumination source must provide ultraviolet radiation suited to the measurement task. The semiconductor band gap and alloy composition determine photon energy, while device engineering affects efficiency and stability. Their compact format also supports integration into analytical instruments that require mercury-free ultraviolet illumination.
DUV LEDs can serve as ultraviolet illumination sources in photolithography and industrial processing. For these uses, engineers must balance the required emission wavelength with output power, efficiency, operating stability, and lifetime. Device improvements in AlGaN composition, layer design, contacts, and heat management help determine whether the source meets the performance demands of a particular process.