AnweshSahu-UVC-General.pdf (1.01 MB)
Download file

An Ultraviolet C-Band LED device for disinfection of air, articles, and indoor environment

Download (1.01 MB)
posted on 2021-11-02, 14:02 authored by Anwesh SahuAnwesh Sahu

Background: Commonly used items like wallets, keys, and phones are both tricky and impractical to disinfect from the dangers of harmful microbes. This study demonstrates the efficacy of UVC-LED technology in creating an efficient, useful, and practical solution.

Methods: As a demonstration of the efficacy of the UVC-LED light (275 nm), a panel of UVC LEDs was fabricated and was driven with a constant current electronic driver. Staphylococcus aureus and Escherichia coli were placed on Petri dishes, and placed 38 cm away from the UVC-LED panel. UVC flux measured at the petri dishes was 0.093 mW/cm2 . The method involved exposing both the bacteria to UVC treatment for 4 and 8 minutes. For each petri dish, the number of colony forming units were compared before and after the treatment and compared to the control.

Results: A significant reduction in colony forming unit (cfu) counts was found in all samples for both sets of bacteria: 97.9% in the 4 minutes treat- ment(22.3 mJ/cm2), and 99.9% in the 8 minutes treatment(44.6 mJ/cm2).

Conclusion: UVC-LED technology offers an effective, simple and inexpensive approach for disinfection.


Not Applicable


Email Address of Submitting Author

ORCID of Submitting Author


Submitting Author's Institution

Foothill College

Submitting Author's Country

United States of America

Usage metrics