Doctor Le Mercier is a PhD (University of Paris) with a specialty in solid state chemistry and optical properties of inorganic materials. He has been working for Solvay (previously Rhodia), a world-leading company in rare earths, for 16 years. He is currently the head of research and development department focused on new inorganic materials and breakthrough developments for energy applications and sustainable resources. He has been developing new rare earths phosphor materials for lighting and display systems. He is author of more than 30 patents is this field.