8. Conclusion

After more than a century of research and development in the field of luminophore materials, we can see that they are still of vital importance in our everyday lives. It's a field of research in which there's always intense activity, whether in the race for luminous efficacy, in the quest to reduce energy costs or to improve lighting quality.

Luminophores are used in a wide range of applications other than lighting and visualization (lasers, optical fibers for telecommunications, security markings, photovoltaics). The development of nanotechnologies is also opening up innovative avenues of research, particularly in the fields of imaging and diagnostic aids in the medical sector.

Today, lighting accounts for around 20% of the world's energy consumption. Clearly, improving light sources is a major challenge and a major social issue. In this...