Associate Professor
The Applied Physics Division
+30 2610 996793
Hours Availability:
Δευτέρα 2-3, Τετάρτη 11-12, Πέμπτη 1-2
Short Bio


Dr George Leftheriotis is associate professor in Renewable Energy Sources, at the Department of Physics, University of Patras.

He studied Physics at the University of Patras and was awarded the BSc degree in 1987. Having received an EU grant, he carried out postgraduate studies in the field of Wind Energy at Warwick University, UK. He received the MSc degree in Engineering (by research, with distinction) in 1989 with a thesis focused on the use of leading edge vortices produced by slender delta wings as wind power augmenters. In 1992 he received the PhD degree in Engineering  with a thesis concerning the design of wind turbines to operate within the delta wing vortices.

During the period 1995-2009 he has worked as a research fellow at the Energy and Environment Laboratory of Physics Department, University of Patras, taking part in five European research projects (Joule, Energie 4, TMR-LSF) and in more than ten national projects. In 2009 he obtained his present position.

During the last decade his research interests have switched to the development of materials and devices for renewable energy applications, such as low-e coatings, photovoltaics and electrochromics. He has worked on the production of novel materials and devices with vacuum and chemical techniques and on their optical, electrical and electrochemical characterization.

His research activity has led to the publication of 49 papers in refereed international journals, 37 contributions to international conferences and 40 to national conferences. He has contributed to the writing of chapters in three review books on renewable energy and chromogenic materials. He has about 1300 citations (H-index 21).



BSc in Physics. University of Patras, Greece, Sept. 1983- Sept. 1987.


MSc (by research, with distinction) in Engineering. University of Warwick, UK, Jan. 1988- May. 1989.

Research field: Wind Energy

PhD in Engineering.  University of Warwick, UK, Jan. 1990- Aug. 1992.

Research field: Wind Energy


As of 3-3-2016: Associate Professor, Physics Department, University of Patras, Greece.
18-9-2009 to 3-3-2016: Assistant Professor, Physics Department, University of Patras, Greece.
5-6-2001 to 18-9-2009: Region of Western Greece, licencing or Renewable Energy projects.
1-2-1996 to 5-6-2001: Post-doctoral researcher, Physics Department, University of Patras, Greece.


Publications in peer reviewed journals: 49
Monographs: 2 (MSc, PhD Theses)
Book chapters: 3
International Conference papers: 37
Reviewer of 25 International Journals
Citations: ~1300.
Η-index: 21 

Research Activities
  1. G. Leftheriotis and C. G. Carpenter, Development of a procedure for the design of a wind turbine to operate in the vortex field generated by a slender delta wingWind Engineering, 14 , 153, 1990
  2. G. Leftheriotis and C. G. Carpenter, Investigation of the vortex field generated by a slender delta wingWind Engineering, 14, 141, 1990
  3. G. Leftheriotis and C. G. Carpenter, Investigation of Reynolds number effects on the design of a delta wing vortex wind turbineWind Engineering, 15 , 8, 1991
  4. G. Leftheriotis and C. G. Carpenter, Investigation of the delta wing- turbine system suitability for large scale applicationsWind Engineering, 15 , 16, 1991
  5. G. Leftheriotis and C. G. Carpenter, Development of a wind turbine to operate in the vortex filed generated by a slender delta wingJournal of Wind Engineering and Industrial Aerodynamics, 39 , 417, 1992
  6. G. Leftheriotis, P. Yianoulis, D. Patrikios, Deposition and optical properties of optimised ZnS/Ag/ZnS thin films for energy saving applicationsThin Solid Films, 306 , 92, 1997
  7. S. Papaefthimiou, G. Leftheriotis, P. Yianoulis, Electrochromic phenomena in transition metal oxide thin films prepared by thermal evaporationIonics, 4 , 321, 1998
  8. P. W. Griffiths, M. Di Leo, P. Cartwright, P. C. Eames, P. Yianoulis, G. Leftheriotis and B. Norton, Fabrication of evacuated glazing at low temperaturesSolar Energy, 63 , 243, 1998
  9. G. Leftheriotis, P. Yianoulis, Characterisation and stability of low emittance multiple coatings for glazings applicationsSolar Energy Materials and Solar Cells, 58 , 185, 1999
  10. S. Papaefthimiou, G. Leftheriotis and P. Yianoulis, Study of electrochromic incorporating WO3, MoO3, WO3-MoO3 and V2O5 coatingsThin Solid Films, 343-344 , 180, 1999
  11. G. Leftheriotis, S. Papaefthimiou, P. Yianoulis, Development of multilayer transparent conductive coatingsSolid State Ionics, 136-137 , 655, 2000
  12. G. Leftheriotis, S. Papaefthimiou, P. Yianoulis, Integrated low emittance-electrochromic devices incorporating ZnS/Ag/ZnS coatings as transparent conductorsSolar Energy Materials and Solar Cells, 61 , 107, 2000
  13. G. Leftheriotis, P. Yianoulis, Thermal properties of building materials evaluated by a dynamic simulation of a test cellSolar Energy, 69 , 295, 2000
  14. S. Papaefthimiou, G. Leftheriotis, P. Yianoulis, Advanced electrochromic devices based on WO3 thin filmsElectrochimica Acta, 46 , 2145, 2001
  15. A. Siokou , G. Leftheriotis, S. Papaefthimiou, P. Yianoulis, Effect of the tungsten and molybdenum oxidation states on the thermal coloration of amorphous WO3 and MoO3 filmsSurface Science, 482-5 , 294, 2001
  16. G. Leftheriotis, S. Papaefthimiou, P. Yianoulis, A. Siokou, Effect of the tungsten oxidation states in the thermal coloration and bleaching of amorphous WO3 filmsThin Solid Films, 384 , 298, 2001
  17. S. Papaefthimiou, G. Leftheriotis and P. Yianoulis, Study of WO3 films with textured surfaces for improved electrochromic performanceSolid State Ionics, 139 , 135, 2001
  18. G. Leftheriotis, S. Papaefthimiou, P. Yianoulis, A. Siokou, D. Kefalas, Structural and electrochemical properties of opaque sol–gel deposited WO3 layersApplied Surface Science, 218 , 275, 2003
  19. A. Siokou, S. Ntais, S. Papaefthimiou, G. Leftheriotis and P. Yianoulis, Influence of the substrate on the electrochromic characteristics of lithiated α-WO3 layersSurface Science, 566–568 , 1168, 2004
  20. G. Leftheriotis, S. Papaefthimiou and P. Yianoulis, The effect of water on the electrochromic properties of WO3 films prepared by vacuum and chemical methodsSolar Energy Materials and Solar Cells, 83 , 115, 2004
  21. S. Papaefthimiou, G. Leftheriotis, P. Yianoulis, T.J. Hyde, P.C. Eames, Y. Fang, P.-Y. Pennarun, P. Jannasch, Development of electrochromic evacuated advanced glazingEnergy and Buildings, 38 , 1455, 2006
  22. A. Siokou, S. Ntais, V. Dracopoulos, S. Papaefthimiou, G. Leftheriotis, P. Yianoulis, Substrate related structural, electronic and electrochemical properties of evaporated CeOx ion storage layersThin Solid Films, 514 , 87, 2006
  23. G. Leftheriotis, S. Papaefthimiou , P. Yianoulis, Dependence of the estimated diffusion coefficient of LixWO3 films on the scan rate of cyclic voltammetry experimentsSolid State Ionics, 178 , 259, 2007
  24. G. Leftheriotis and P. Yianoulis , Development of electrodeposited WO3 films with modified surface morphology and improved electrochromic propertiesSolid State Ionics 179 , 2192, 2008
  25. G. Leftheritotis, G. Syrrokostas, P. Yianoulis, Development of photoelectrochromic devices for dynamic solar control in buildingsSolar Energy Materials and Solar Cells 94 , 2304, 2010
  26. M. Giannouli, G. Leftheriotis, The effect of precursor aging on the morphology and electrochromic performance of electrodeposited tungsten oxide filmsSolar Energy Materials and Solar Cells 95, 1932, 2011
  27. G. Syrrokostas, A. Siokou, G. Leftheriotis and P. Yianoulis, Degradation mechanisms of Pt counter electrodes for dye sensitized solar cellsSolar Energy Materials and Solar Cells 103, 119, 2012
  28. G. Leftheritotis, G. Syrrokostas, P. Yianoulis, Partly covered photoelectrochromic devices with enhanced coloration speed and efficiencySolar Energy Materials and Solar Cells 96, 86, 2012
  29. G. Leftheriotis, E. Koubli, P. Yianoulis, Combined electrochromic-transparent conducting coatings consisting of noble metal, dielectric and WO3 multilayersSolar Energy Materials & Solar Cells 116 , 110, 2013
  30. G. Leftheriotis, G. Syrrokostas and P. Yianoulis, Photocoloration efficiency and stability of photoelectrochromic devicesSolid State Ionics 231 , 30, 2013
  31. G. Leftheriotis, M. Liveri, M. Galanopoulou, I. D. Manariotis, P. Yianoulis, A simple method for the fabrication of WO3 films with electrochromic and photo catalytic propertiesThin Solid Films 573 , 6-13, 2014
  32. G. Syrrokostas, G. Leftheriotis, P. Yianoulis , Effect of acidic additives on the structure and performance of TiO2 films prepared by a commercial nanopowder for dye-sensitized solar cellsRenewable Energy 72 , 164-173, 2014
  33. Y. Tripanagnostopoulos, G. Leftheriotis, A. Vradis, D. Anastasopoulos, N. Spiliopoulos, P. Priftis, I. Manariotis, P. Lianos, E. Stathatos, Solar energy materials and systems for and aesthetic and sustainable futureContemporary Materials V-2 , 172 -185, 2014
  34. E. Koubli, S. Tsakanikas, G. Leftheriotis, G. Syrrokostas, P. Yianoulis, Optical properties and stability of near-optimum WO3/Ag/WO3 multilayers for electrochromic applicationsSolid State Ionics 272 , 30-38, 2015
  35. G. Syrrokostas, G. Leftheriotis, P. Yianoulis, Performance and stability of“partly covered”photoelectrochromic devices for energy saving and power productionSolid State Ionics 277, 11-22, 2015
  36. F. Bella, G. Leftheriotis, G. Griffini, G. Syrrokostas, S. Turri, M. Grätzel, C. Gerbaldi, A new design paradigm for smart windows: Photocurable polymers for quasi-solid photoelectrochromic devices with excellent long-term stability under real outdoor operating conditionsAdvanced Functional Materials 26, 1127–1137, 2016
  37. A.I. Dounis, G. Leftheriotis, S. Stavrinidis G. Syrrokostas, Electrochromic Device Modeling Using an Adaptive Neuro-Fuzzy Inference System: A Model-free ApproachEnergy and Buildings 110 , 182–194, 2016
  38. L. Sygellou, S. Kakogianni, A. K. Andreopoulou, K. Theodosiou, G. Leftheriotis, J. K.Kallitsis, A.Siokou, Evaluation of the electronic properties of perfluorophenyl functionalized quinolines and their hybrids with carbon nanostructuresPhysical Chemistry Chemical Physics 18, 4154 – 4165, 2016
  39. A. Antonelou, G.Syrrokostas, L. Sygellou, G. Leftheriotis, V. Dracopoulos, S. N. Yannopoulos, Facile, substrate-scale growth of mono- and few-layer homogeneous MoS2 films on Mo foils with enhanced catalytic activity as counter electrodes in DSSNanotechnology 27 , 045404 (11pp), 2016
  40. M. Giannouli, G.Tziogkidou, G. Leftheriotis, Co-sensitization of ZnO Solar Cells by Organic DyesJournal of Renewable and Sustainable Energy 9, 013503, 2017
  41. D. Papathanasopoulos, G. Leftheriotis, E. Mitronikas , Design, fabrication and testing of an electronic device for the automatic control of electrochromic windowsJournal of Building Engineering 12 , 248–258, 2017
  42. A. Dokouzis, K. Theodosiou, G. Leftheriotis , Assessment of the long-term performance of partly covered photoelectrochromic devices under insolation and in storageSolar Energy Materials & Solar Cells 182 , 281-293 , 2018
  43. G. Syrrokostas, A. Antonelou, G. Leftheriotis, S. N. Yannopoulos, Electrochemical properties and long-term stability of molybdenum disulfide and platinum counter electrodes for solar cells: A comparative studyElectrochimica Acta 267, 110-121, 2018
  44. M. Giannouli, K. Govatsi, G. Syrrokostas, S. N. Yannopoulos, G. Leftheriotis, Factors Affecting the Power Conversion Efficiency in ZnO DSSCs: Nanowire vs. NanoparticlesMaterials 11, 411-428, 2018 Invited contribution
  45. P. Giannopoulos, D. Raptis, K. Theodosiou, A. K. Andreopoulou, C. Anastasopoulos, A. Dokouzis, G. Leftheriotis, P. Lianos, J. K. Kallitsis, Organic dyes end-capped with perfluorophenyl anchors: Synthesis, electrochemical properties and assessment of sensitization capacity of titania photoanodesDyes and Pigments 148, 167-179, 2018
  46. G. Syrrokostas, K. Govatsi, G. Leftheriotis, S. N. Yannopoulos , 3D structured counter electrodes for Dye Sensitized Solar Cells based on Pt-decorated ZnO nanowiresJournal of Electroanalytical Chemistry 835 , 86–95 , 2019
  47. G. Syrrokostas, G. Leftheriotis, S. N. Yannopoulos , Double-layered zirconia films for carbon-based mesoscopic perovskite solar cells and photodetectorsJournal of Nanomaterials , Article ID 8348237 , 2019
  48. Κ. Theodosiou, A. Dokouzis, I. Antoniou, G. Leftheriotis , Gel electrolytes for partly covered photoelectrochromic devicesSolar Energy Materials & Solar Cells 202, 110124, 2019
  49. A. Dokouzis, F. Bella, K. Theodosiou, C. Gerbaldi, G. Leftheriotis , Photoelectrochromic devices with cobalt redox electrolytesMaterials Today Energy 15 , 100365, 2020
  50. J. Zhang, J. Yang, G. Leftheriotis, H. Huang, Y. Xia, C. Liang, Y. Gan, W. Zhang, Integrated photo-chargeable electrochromic energy-storage devices” Electrochimica Acta 345 (2020) 136235
  51. A. Dokouzis, D. Zoi, G. Leftheriotis, Photoelectrochromic devices with enhanced power conversion efficiency” Materials 13 (2020) 2565 Invited contribution
  52. G. Syrrokostas, A. Dokouzis, S. N. Yannopoulos, G. Leftheriotis, Novel photoelectrochromic devices incorporating carbon-based perovskite solar cells” Nano Energy 77 (2020) 105243 
  53. L. Lavagna, G. Syrrokostas, L. Fagiolari, J. Amici, C. Francia, S. Bodoardo, G. Leftheriotis, F. Bella, Platinum-free photoelectrochromic devices working with copper-based electrolytes for ultrastable smart windows” Journal of Materials Chemistry A 9 (2021) 19687–19691
  54. Z. Liu, J. Yang, G. Leftheriotis, H. Huang, Y. Xia, Y. Gan, W. Zhang, J. Zhang A solar-powered multifunctional and multimode electrochromic smart window based on WO3/Prussian blue complementary structure” Sustainable Materials and Technologies, 31 (2022) e00372