Simulation Based Design of Deep Ultraviolet LED Array Module Used in Virus Disinfection

Cao, Yixing; Chen, Wei; Li, Min; Xu, Bin; Fan, Jiajie; Zhang, Guoqi

doi:10.1109/icept50128.2020.9202924

Cited by 6 publications

(5 citation statements)

References 7 publications

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“…1) so, at this moment, the two adjacent bases are linked through stronger covalent bonds provoking genetic mutation by chain disruptions [22,40,41]. Because of this RNA (DNA) sequence's fractures, the capabilities of viruses and bacteria are depleted, preventing their lodging, reproduction, and the infection that causes to the host [42]. Therefore, the use of germicidal UVC radiation devices to disinfect potentially infectious surfaces is taken as an important object of study to compare efficiency, risks, and benefits between technologies [27,43,44].…”

Section: Uv Radiation For Disinfectionmentioning

confidence: 99%

Physical and technological analysis of the AlGaN-based UVC-LED: an extended discussion focused on cubic phase as an alternative for surface disinfection.

et al. 2022

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Crisis in coronavirus times requires understanding the effects on society and establishing efficient mechanisms to prevent infections. The disinfection of personal protection equipment by UVC light remains a key opportunity area. Therefore, this letter presents the main drawbacks and challenges on the fabrication of deep ultraviolet LEDs based on III-nitrides, such as the substrate selection, dislocation reduction, the increase of external quantum efficiency, enhancement of the radiative recombination in the active region, the complications to reach high Al content in AlGaN-based UVC LED avoiding the reduction of the p-doping, replacing the p-GaN contact layer by p-AlGaN without hindering the deposition of ohmic contacts. Furthermore, the cubic phase is suggested as a promising candidate for AlGaN UVC-LEDs applications as is discussed in this work.

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Section: Uv Radiation For Disinfectionmentioning

confidence: 99%

Physical and technological analysis of the AlGaN-based UVC-LED: an extended discussion focused on cubic phase as an alternative for surface disinfection.

et al. 2022

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“…Limited approaches to surface disinfection simulation were presented in [18] and most recently in [19] with applications to coronavirus but without considering the physics of UV atmospheric propagation. In the work of [20], a 3×3 UV-C LED array was designed to disinfect small packaging, and its effectiveness was assessed with a simple ray-tracing simulator.…”

Section: A Related Workmentioning

confidence: 99%

“…The probability, π i , for the particle with diameter d i is estimated according to (20), setting n 0 = 1 [43]. Furthermore, the concentration of every particle, ρ i , is derived through the following linear system…”

Section: Spherical Particles With Different Diametersmentioning

confidence: 99%

LaUV: A Physics-Based UV Light Simulator for Disinfection and Communication Applications

et al. 2021

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The sterilization properties of the C-band of the ultraviolet (UV) light have been wellknown for many years; however, their application has become more vital and widespread today due to the Covid-19 pandemic. Nevertheless, minimal work has been devoted to simulating UV-C propagation for surface disinfection in indoor environments. UV light has also been proposed for non-line-of-sight (NLOS) outdoor communication applications, where a number of simulators have been developed, but with several simplifications. The current work presents a fully-featured simulator for UV light propagation, called LaUV, designed mainly for indoor settings, capable of calculating measurable parameters that can be used for indoor surface disinfection and communication applications. LaUV considers atmospheric absorption and scattering according to Rayleigh and Mie theory, and reflections from rough surfaces. The scattering crosssection and probability density function of the scattering angles (phase function) are calculated accurately for any wavelength, concentration, and diameter distribution of spherical scattering particles (aerosols and droplets). Examples are presented for indoor environments, including empty rooms and rooms with furniture, for different environmental conditions and surface albedos. Interesting initial conclusions can be drawn, considering the spatial distribution of UV exposure for surface disinfection applications and channel modeling for line-of-sight (LOS) and NLOS communication, demonstrating the versatility and the potential applications of the proposed simulator.

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“…The electromagnetic radiation from the UV-C spectrum offers efficient disinfection properties at the level of bacteria, germs, and viruses in sterilization processes (water, air, volume, surface, materials, components, food, etc.) Since the middle of the nineteenth century, it has been used with solar UV exposure, and starting in the middle of the twentieth century, it has been used widely with artificial UV generators [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Device for Identifying the UV Emission Spectrum

Kovács

Szolga

2022

Sensors

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Nowadays, the disinfection of classrooms, shopping malls, and offices has become an important part of our lives. One of the most effective disinfection methods is ultraviolet (UV) radiation. To ensure the disinfection device has the required wavelength spectrum, we need to measure it with dedicated equipment. Thus, in this work, we present the development of a UV spectrum detector capable of identifying UV wavelength spectrums, with a wide range of probes and the ability to transmit data to a PC for later evaluation of the results. The device was developed with four UV sensors: one for UV-A, one for UV-B, one for UV-C, and one with a wide range of detection of UVA, with a built-in transimpedance amplifier. An Arduino Nano development board processes all the acquired data. We developed a custom light source containing seven UV LEDs with different central wavelengths to calibrate the device. For easy visualization of the results, custom PC software was developed in the Processing programming medium. For the two pieces of electronics—the UV detector and calibration device—3D-printed housings were created to be ergonomic for the end-user. From the price point of view, this device is affordable compared to what we can find on the market.

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Simulation Based Design of Deep Ultraviolet LED Array Module Used in Virus Disinfection

Cited by 6 publications

References 7 publications

Physical and technological analysis of the AlGaN-based UVC-LED: an extended discussion focused on cubic phase as an alternative for surface disinfection.

Physical and technological analysis of the AlGaN-based UVC-LED: an extended discussion focused on cubic phase as an alternative for surface disinfection.

LaUV: A Physics-Based UV Light Simulator for Disinfection and Communication Applications

Device for Identifying the UV Emission Spectrum

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