Undestanding commercial UVC LEDs reliability to boost disinfection efficacy

Nicola Trivellin; Francesco Piva; Carlo De Santi; Alessandro Caria; Matteo Buffolo; Gaudenzio Meneghesso; Enrico Zanoni; Matteo Meneghini

doi:10.1117/12.3002252

13 March 2024 Undestanding commercial UVC LEDs reliability to boost disinfection efficacy

Nicola Trivellin, Francesco Piva, Carlo De Santi, Alessandro Caria, Matteo Buffolo, Gaudenzio Meneghesso, Enrico Zanoni, Matteo Meneghini

Author Affiliations +

Proceedings Volume 12906, Light-Emitting Devices, Materials, and Applications XXVIII; 129060E (2024) https://doi.org/10.1117/12.3002252
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

We present the results of accelerated lifetime tests conducted on UV-C LEDs with nominal wavelengths between 265 and 275 nm. We aged the devices at their absolute maximum current, performing electrical, optical, and spectral characterizations. Reliability tests showed L90 above 300 h and L80 above 1000 h, and we identified common behaviors, such as an optical recovery during their operation, and an instantaneous OP decrease at the turn-on. To conclude, we correlated the total optical power emitted with the number of disinfection cycles that the device could provide to reach log3 inactivation of the Sars-CoV-2 virus.

Citation Download Citation

Nicola Trivellin, Francesco Piva, Carlo De Santi, Alessandro Caria, Matteo Buffolo, Gaudenzio Meneghesso, Enrico Zanoni, and Matteo Meneghini "Undestanding commercial UVC LEDs reliability to boost disinfection efficacy", Proc. SPIE 12906, Light-Emitting Devices, Materials, and Applications XXVIII, 129060E (13 March 2024); https://doi.org/10.1117/12.3002252

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