Journal
ELECTRONICS
Volume 11, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/electronics11050728
Keywords
UVC; LED; degradation; reliability; disinfection
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Funding
- Italian Ministry of Education, Universities and Research (MIUR), under the aegis of the Fondo per il finanziamento dei dipartimenti universitari di eccellenza initiative [232/2016]
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This study reports on the reliability of recent commercial UVC LED devices and their efficacy in antiviral technologies for COVID-19. An in-depth analysis of four different state-of-the-art commercial LEDs suitable for disinfection applications indicates limited reliability possibly related to an increase in Shockley-Read-Hall (SRH) recombination. Suggestions for product design improvements will be proposed based on the results of this work.
With this study, we report on the reliability of the most recent commercial UVC LED devices. The current COVID-19 pandemic urged the development of antiviral technologies, and one of the most effective is based on UVC irradiation, which can be effectively achieved by means of Deep UV LEDs. The development of antiviral systems based on UVC LEDs strongly depends on their efficacy and reliability. We propose an in-depth analysis of four different state-of-the-art commercial LEDs suitable for disinfection applications. LEDs have been subjected to a controlled stress test near their application limits, and their reliability and characteristics have been analyzed and studied. Results indicate a still limited reliability, with a degradation possibly related to an increase in Shockley-Read-Hall (SRH) recombination. Finally, some relevant product design suggestions will be proposed based on the results of this work.
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