Conceptual Ultraviolet-C Light Source Based on Up-Conversion Luminescence

Ultraviolet-C illumination may provide a promising solution for the disinfection technology, and thus the development of novel type of ultraviolet-C light sources is continuously expected. Herein, a conceptual design of ultraviolet-C light source based on up-conversion luminescence of phosphor material is introduced. Accordingly, a composite film is prepared using YBO3:Pr3+ phosphor and a transmissive remote phosphor-converted light source is built by combing the phosphor film with a 447 nm laser. Spectral measurements show that the phosphor-converted design emits ultraviolet-C light peaking at 263 and 274 nm with tunable emission intensities. Moreover, ultraviolet imaging demonstration implies that the present design has a potential to serve as an ultraviolet-C germicidal light source for surface decontamination.

Automated summary

A conceptual design of an ultraviolet-C light source based on up-conversion luminescence of phosphor material is introduced, which emits ultraviolet-C light peaking at 263 and 274 nm with tunable emission intensities. The design has the potential to serve as an ultraviolet-C germicidal light source for surface decontamination.