Lucas Erasmas (University of Free State): Phosphor Materials: Current technologies and emerging applications

Abstract

Phosphor materials emit light following excitation by ultraviolet radiation, X-rays, or electron beams. This luminescence arises from electronic transitions involving activator ions, typically rare-earth or transition metal ions, incorporated into a host material. The emission spectrum is determined primarily by the activator ion and its local environment within the host lattice.

These materials have played a central role in technologies such as fluorescent lighting and cathode-ray tube (CRT) displays. Their applications have since expanded to include energy-efficient white light-emitting diodes (LEDs) and modern display systems, driving the development of materials with improved luminous efficiency, colour rendering, and stability. Beyond lighting and displays, phosphors are used in temperature sensing and scintillation-based radiation detection. They are also being investigated for applications in solar-energy conversion and latent fingerprint detection.

This talk will review the current state of phosphor materials research, examining established and emerging applications and the material properties required to meet the specific demands of each technology.

Zoom information

https://us02web.zoom.us/j/2022111100

(Meeting code: 2022111100 Password: skcm2)