E!531, SafeUVC, A safe ultraviolet source that is compact.
| Reference number | |
| Coordinator | PureFize Technologies AB |
| Funding from Vinnova | SEK 1 793 946 |
| Project duration | May 2022 - May 2025 |
| Status | Completed |
| Venture | Eurostars |
Important results from the project
The project goal was to create a compact light sources that emits in the FarUVC light (200-230 nm). The project acheived this by combining PureFize field emission technology with newly developed aluminum nitride layers. Approx. 25 produced light sources emitted FarUVC light. The light sources delivered at best 0.03% efficiency, 120 µW output power and a lifetime > 1000h. Bacterial reduction was demonstrated after 7h of illumination (E.coli), and a concept for a keyboard cleaner was developed.
Expected long term effects
The project results show that compact FarUVC sources can be produced. Although not all performance targets were met, creating functional prototypes emitting FarUVC light and demonstrating bacterial reduction is a significant achievement. With further development of AlN layers and system optimization, these FarUVC light sources could become marketable. They have the potential to be a cost-effective solution compared to KrCl lamps, with a longer lifespan than current LEDs in the FarUVC range.
Approach and implementation
The project started with a specification phase for performance goals and material requirements, followed by tests on AlN layer growth, decisions on growth technology, and production of AlN anodes. With new anodes, light sources were produced. The final phase included characterization of the light sources and verification of the bacterial effect. The project adhered to the timeline in general, but a 6-month extension allowed for further optimization of the AlN layer and light source production.