Results 1 to 10 of about 4,707 (158)
Deep Ultraviolet Light-Emitting Diode Light Therapy for Fusobacterium nucleatum [PDF]
Microorganisms, 2021 Background: Fusobacterium nucleatum, which is associated with periodontitis and gingivitis, has been detected in colorectal cancer (CRC). Methods: We evaluated the bactericidal effect of deep ultraviolet (DUV) light-emitting diode (LED) light therapy on F. nucleatum both qualitatively and quantitatively.
Soichiro Fukuda +12 more
exaly +7 more sources
Deep Ultraviolet CMOS-Controlled Micro Light-Emitting Diode Array [PDF]
IEEE Photonics Journal, 2023 We report a Deep Ultraviolet (DUV) AlGaN micro-light emitting diode (micro-LED) array driven by a matching array of electronic drivers implemented in Complementary Metal-Oxide-Semiconductor (CMOS) technology. This 40 × 10 pixel integrated device required improvements in micro-LED fabrication combined with control over the LED ground level in the
Jonathan J. D. McKendry +7 more
exaly +7 more sources
Research Progress of AlGaN-Based Deep Ultraviolet Light-Emitting Diodes
Micromachines, 2023 AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs) have great application prospects in sterilization, UV phototherapy, biological monitoring and other aspects. Due to their advantages of energy conservation, environmental protection and easy miniaturization realization, they have garnered much interest and been widely researched.
Ruiqiang Xu +4 more
openaire +3 more sources
Study on the performance of high-voltage deep ultraviolet light-emitting diodes
Optics Express, 2022 This study fabricated high-voltage, low-current DUV-LEDs by connecting two devices. Due to better current spreading and the enhanced reflective mirror effect, high-voltage devices present a higher dynamic resistance, emission output power, wall-plug efficiency, external quantum efficiency, and view angle than single traditional devices. The study found
Yu-Hsuan Hsu +8 more
openaire +2 more sources
Biomedical and Biotechnology Applications of Deep Ultraviolet Light Emitting Diodes [PDF]
2021 IEEE Research and Applications of Photonics in Defense Conference (RAPID), 2021 The COVID-19 pandemic rekindled attention to biomedical application of the Deep Ultraviolet Light Emitting Diodes that include killing bacteria and viruses, purifying air, disinfecting water supplies, prolonging food storage, increasing plant yield, improving produce quality post-harvest, adjusting lighting spectral power distribution, and regulating ...
openaire +1 more source
Extraction efficiency simulation in deep ultraviolet AlGaN light emitting diodes [PDF]
Optical and Quantum Electronics, 2021 Abstract A ray tracing model is developed to study the light extraction efficiency (LEE) of the nitride wide band gap semiconductor deep ultraviolet light emitting diodes (DUV-LEDs). The basic device structure is flip-chip LED device with dome shape encapsulation.
Qian Fan, Xianfeng Ni, Bing Hua, Xing Gu
openaire +1 more source
Nitride deep-ultraviolet light-emitting diodes with microlens array [PDF]
Applied Physics Letters, 2005 We report on the fabrication of 280-nm AlGaN-based deep-ultraviolet light-emitting diodes (UV LEDs) on sapphire substrates with an integrated microlens array. Microlenses with a diameter of 12μm were fabricated on the sapphire substrate by resist thermal reflow and plasma dry etching.
M. Khizar +4 more
openaire +1 more source
Transparent electrode design for AlGaN deep-ultraviolet light-emitting diodes
Optics Express, 2017 Zinc gallate (ZnGa2O4; ZGO) thin films were employed as the p-type transparent contact layer in deep-ultraviolet AlGaN-based light-emitting diodes (LEDs) to increase light output power. The transmittance of 200-nm-thick ZGO in deep-ultraviolet wavelength (280 nm) was as high as 92.3%.
Ray- Hua Hrong +5 more
openaire +2 more sources
On the Hole Injection for III-Nitride Based Deep Ultraviolet Light-Emitting Diodes [PDF]
Materials, 2017 The hole injection is one of the bottlenecks that strongly hinder the quantum efficiency and the optical power for deep ultraviolet light-emitting diodes (DUV LEDs) with the emission wavelength smaller than 360 nm. The hole injection efficiency for DUV LEDs is co-affected by the p-type ohmic contact, the p-type hole injection layer, the p-type electron
Luping Li +5 more
openaire +2 more sources
DEEP ULTRAVIOLET LIGHT EMITTING DIODES (DUV LEDS)
Journal of Engineering Science (Chişinău), 2018 There are a variety of applications for devices that extend into the deep-UV, including biological agent detection and optical storage. The nitride material system is a set of semiconducting compounds that have wavelengths that span a broad range, from yellow to deep-UV. AlGaN has a direct bandgap that extends into the deep-UV range; the device-quality
openaire +2 more sources