Over the last years, UVC LEDs have enabled cost-effective and efficient disinfection systems and tools [1], [2]. In this work we investigate the optical degradation kinetics of 265 nm SQW LEDs [3], focusing in particular on the non-monotonic and current-dependent optical power variation, with the aim of identifying the root causes of the optical instability of solid-state UVC emitters.
Positive and negative ageing of AlGaN-based UVC LEDs: experimental analysis, interpretation and modeling
Matteo Buffolo;Francesco Piva;Nicola Roccato;Carlo De Santi;Nicola Trivellin;Gaudenzio Meneghesso;Enrico Zanoni;Matteo Meneghini
2025
Abstract
Over the last years, UVC LEDs have enabled cost-effective and efficient disinfection systems and tools [1], [2]. In this work we investigate the optical degradation kinetics of 265 nm SQW LEDs [3], focusing in particular on the non-monotonic and current-dependent optical power variation, with the aim of identifying the root causes of the optical instability of solid-state UVC emitters.
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