Luis Santos received the degree of Doctor of Engineering Science in Materials Science from Instituto Superior Técnico in 1996. He is Assistant Professor in the Department of Chemical Engineering at Instituto Superior Técnico, University of Lisbon and a researcher in the Centre for Structural Chemistry (CQE) In academia, he has developed and taught both graduate and undergraduate courses in materials science specializing in characterization of materials, glasses and ceramics. He has supervised 2 post-docs, 4 PhD students and 10 Master students.He has published over 70 papers and 1 book chapter. He has been involved in more than 10 R&D projects, three of them as Principal Investigator. Currently he is involved in the project “Photonic crystal-assisted frequency conversion phosphor layers for energy applications?, where photonic crystals thin films are prepared and used to assist the up-conversion and down-conversion processes. This is expected to improve the conversion efficiency of solar cells.