Ansis Mezulis is a scientific researcher at Institute of Solid State physics, Latvia. He received Master Degree in physics at University of Latvia in 1996 and has defended Ph.D. degree at University Paris VII Denis Diderot (France) in 1999. He has worked for more than 20 years as a scientific officer in fields of heat and mass transfer, fluid and gas dynamics. Ansis Mezulis has camped in several foreign universities and participated in numerous projects co-financed by the European Regional Development Fund (ERDF). Ainars Knoks, MSc. phys., e-mail: ainars.knoks@cfi.lu.lv PhD student and researcher at the Laboratory of Materials for Energy Harvesting and Storage, the Institute of Solid State Physics, University of Latvia (ISSP UL). The main research areas include materials and technologies for renewable energy sources with focus on photocatalysis and synthesis of nanostructured TiO2. Ainārs Knoks has participated in various local and international projects related to material science and energy, specialization fields are semiconductor physics, material science, optical and electrical properties of materials, electrochemical synthesis and investigation. Pteris Lesnicenoks, MSc., e-mail: Peteris.Lesnicenoks@cfi.lu.lv PhD student of materials science at Riga Technical University, acquired his master’s degree in materials science in 2015. His field of studies encompasses materials for hydrogen energetics, energy storage and gas sensors.