Jānis Kleperis, Dr. phys., is a Lead Researcher, Head of Laboratory of Hydrogen Energy Materials of the Institute of Solid State Physics (ISSP), University of Latvia. He has participated in various local and international projects related to materials science, energy and environment. He is an author of more than 150 scientific publications. The theme of his doctoral thesis was “Research of Colour Centres in Tungsten Trioxide”. His fields of specialization are semiconductor physics, materials science, optical and electrical properties of materials, solid state ionics, electrochromic phenomena, chemical gas sensors, instruments with artificial intellect (electronic nose), hydrogen gas sensors, materials for hydrogen storage, Li and metal hydride batteries; electrolysis, membranes and MEA for fuel cells; DOAS for air pollution monitoring; air pollution measurement, emission calculations, forecasts. Jānis Kleperis is a member of International Society of Electrochemistry.