Greatly Enhanced Wall-Plug Efficiency of N-polar AlGaN-Based Deep Ultraviolet Light-Emitting Diodes
IEEE Photonics Journal, 2021 In this work, we numerically investigate the N-polar AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs) over the Ga-polar DUV LEDs. The light output power has increased from 7.1 mW of Ga-polar DUV LED to 18.8 mW of N-polar DUV LED at 60 mA ...
Hongchang Tao +4 more
doaj +2 more sources
Deep Ultraviolet Light-Emitting Diode Light Therapy for Fusobacterium nucleatum
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 ...
Soichiro Fukuda +12 more
doaj +2 more sources
Nanophotonic crystals on unpolished sapphire substrates for deep-UV light-emitting diodes
Scientific Reports, 2021 A new method has been established and employed to create a random nanophotonic crystal (NPhC) structure without photolithography on the unpolished side of a single-side-polished sapphire substrate.
Tinh Binh Tran +2 more
doaj +2 more sources
Improvement of Light Extraction in Deep Ultraviolet GaN Light Emitting Diodes with Mesh P-Contacts
Applied Sciences, 2020 One of the main reasons that the emission efficiency of GaN-based light-emitting diodes (LEDs) decreases significantly as the emission wavelength shorter than 300 nm is the low light extraction efficiency (LEE). Especially in deep ultra-violet (DUV) LEDs,
Shiou-Yi Kuo +3 more
doaj +2 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.
Ruiqiang Xu +4 more
doaj +2 more sources
Nanoscale Research Letters, 2018 This work reports a nearly efficiency-droop-free AlGaN-based deep ultraviolet light-emitting diode (DUV LED) emitting in the peak wavelength of 270 nm. The DUV LED utilizes a specifically designed superlattice p-type electron blocking layer (p-EBL).
Zi-Hui Zhang +7 more
doaj +2 more sources
III-Nitride Deep UV LED Without Electron Blocking Layer
IEEE Photonics Journal, 2019 AlGaN-based deep UV (DUV) LEDs generally employ a p-type electron blocking layer (EBL) to suppress electron overflow. However, Al-rich III-nitride EBL can result in challenging p-doping and large valence band barrier for hole injection as well as ...
Zhongjie Ren +11 more
doaj +2 more sources
Usefulness of a new DUV-LED device for the control of infection by Escherichia coli, Staphylococcus aureus, mycobacteria and spore-forming bacteria. [PDF]
Front Public Health, 2022 Reliable disinfection and sterilization technologies are needed to deal with the various infectious diseases spreading around the world. Furthermore, bacteria that are difficult to eliminate by ordinary disinfection are also a problem in the medical ...
Inagaki H +6 more
europepmc +2 more sources
Tuning Metamaterials for Applications at DUV Wavelengths [PDF]
International Journal of Optics, 2012 The unique properties of metamaterials, namely, their negative refractive index, permittivity, or permeability, have gained much recent attention. Research into these materials has led to the realization of a host of applications that may be useful to ...
Andrew Estroff, Bruce W. Smith
doaj +2 more sources
Carrier Transport in a Deep Ultraviolet Mixed Quantum Well Light Emitting Diode
IEEE Photonics JournalAluminium Gallium Nitride (AlGaN) based light emitting diodes (LED) are the enabling technology for compact emitters of deep ultraviolet (DUV) radiation and are in high demand for environmental and medical applications.
Friedhard Romer +7 more
doaj +2 more sources