Clas Persson

Professor - Structure Physics
Image of Clas Persson
Norwegian version of this page
Phone +47 22852424
Room 109
Visiting address Forskningsparken Gaustadalleen 21 0349 Oslo
Postal address Postboks 1048 Blindern 0316 OSLO

Academic Interests


To understand the basic physics of materials from the point of the atomic scale. We do that by theoretically model and calculate complex material structures. The intention is to desig materials for the use in primarily renewable energy technologies, such as solar cells, LEDs, and thermoelectric devices. The physics at the interface between two materials is very important to analyze the electron, ion, and heat transport in these devices. By understanding the fundamental physics of materials, we can propose new, inexpensive, environmental-friendly, and efficient materials. Thus, we are involved in the development of future energy technologies.

We use world-leading and very powerful computer program to calculate the fundamental properties of materials (Wien2k, VASP, Exciting). We are also involved in developing the software in order to studying new material properties. These computer programs are theoretical tools in our studies. The research is focused on analyzing different types of material structures to obtain both broad and deep theoretical understanding of materials at the atomic level to micrometer scale.




Higher education and employment history

2011 - present   Professor at Department of Physics, UiO. Area: Theoretical Material Physics;

2011- present   Docent/Associate Professor [Univ Lektor] (20%) at Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm.

2013 - 2017  Deputy Head Research, at Dept of Physics, University of Oslo (UiO), Norway.

2007 -  2011  Docent/Associate Professor at Royal Institute of Technology, Stockholm; Area: Theoretical Material Physics for Energy Engineering.

2004 - 2007   Assistant Professor at Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm.

2002 - 2004   Postdoctor at Solid State Theory Group, National Renewable Energy Laboratory, Golden CO, USA.

2000 -  2002  Postdoctor at Condensed Matter Therory, Uppsala University.

1999    PhD at Material Science Division, Linköping University. Area: Theoretical Studies on Si and SiC.



Collaborative projects and joint papers with over 100 research groups in 30 countries; see Personal Home Page.


Personal Home Page

Clas Persson, home page


Tags: materials science, Theoretical physics, Renewable energy, atomistic modeling, DFT, Green's functions, Programming, SMN


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Top five most cited articles:

  • Electronic and optical properties of Cu2ZnSnS4 and Cu2ZnSnSe4, C. Persson, J. Appl. Phys. 107, 053710 (2010). 
  • n-type doping of CuInSe2and CuGaSe2,C. Persson, Y.-J. Zhao, S. Lany, and A. Zunger,  Phys. Rev. B. 72, 035211 (2005). 
  • Relativistic band structure calculation of cubic and hexagonal SiC polytypes, C. Persson and U. Lindefelt, J. Appl. Phys, 82, 5496 (1997). 
  • Anomalous grain boundary physics in polycrystalline CuInSe2, C. Persson and A. Zunger, Phys. Rev. Lett. 91, 266401 (2003). 
  • Strong valence-band offset bowing of ZnO1-xSx enhances p-type nitrogen doping of ZnO-like alloys, C. Persson, C. Platzer-Björkman, J. Malmström, T.Törndahl, and M. Edoff,  Phys. Rev. Lett. 97, 146403 (2006).

Five recent articles:

  • IRVSP: to obtain irreducible representations of electronic states in the VASP, J. Gao, Q. Wu, C. Persson, and Z. Wang, Comput. Phys. Commun. 261, 107760 (2021) .
  • Chemical stability of Ca3Co(4-x)O(9-d)/CaMnO(3-d) p-n junction for oxide based thermoelectric generators, A. E. Gunnaes, R. Tofan, K. Berland, S. Gorantla, T. A. Storaas, T. D. Dessisa, M. Schrade, C. Persson, M.-A. Einarsrud, K. Wiik, T. Norby, N. Kanas, RCS Adv. 10, 5026 (2020).
  • Carrier-mediated ferromagnetism in two-dimensional PtS2, K. Iordanidou, M. Houssa, and C. Persson, RCS Adv. 10, 952 (2020).
  • Wide-gap (Ag,Cu)(In,Ga)Se2 solar cells with different buffer materials - A path to a better heterojunction, J. Keller, K. V. Sopiha, O. Stolt, L. Stolt, C. Persson, J. J. S. Scragg, T. Torndahl and M. Edoff, Prog. Photovoltaics 28, 237 (2020).
  • Full-spectrum high resolution modeling of the dielectric function of water, J. Fiedler, M. Boström, C. Persson, I. Brevik, R. Corkery,S. Y. Buhmann, and D. Parsons,J. Phys. Chem. B, 124, 3103 (2020).



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  • Mendonça, Bianca; Chubaci, J. f. d.; Matsuoka, M.; Ferreira da Silva, Antonio; Zambom, Luis & Mansano, Ronaldo [Show all 8 contributors for this article] (2021). Dependence of the electronic and optical properties of thin film TiO2 film with oxygen partial pressure.
  • Sopiha, Kostiantyn; Larsen, Jes; Keller, Jan; Edoff, Marika; Platzer-Björkman, Charlotte & Persson, Clas [Show all 7 contributors for this article] (2020). First-principles analysis of band offsets, phase stability, and alkali incorporation in (Ag,Cu)(In,Ga)Se2 solar cells.
  • Sopiha, Kostiantyn; Grini, Sigbjørn; Platzer-Björkman, Charlotte; Vines, Lasse & Persson, Clas (2020). Strong interplay between Na-and O-related defects in Cu-based chalcogenides.
  • Løvvik, Ole Martin; Berland, Kristian; Remonato, Filippo; Sagvolden, Espen; Flage-Larsen, Espen & Schrade, Matthias [Show all 13 contributors for this article] (2019). Screening thermoelectric materials with ab initio atomistic modelling and machine learning techniques.
  • Zhang, Yanyan; Tang, Yuxin; Deng, Jiyang; Leow, Wan Ru; Xia, Huarong & Zhu, Zhiqiang [Show all 13 contributors for this article] (2019). Cover page: ACS Materials Letters, Volume 1, Issue 5, November 4, 2019.
  • Sopiha, Kostiantyn; Keller, Jan; Larsen, Jes K.; Edoff, Marika; Persson, Clas & Scragg, Jonathan (2019). Band offsets, phase decomposition, and grading in (Ag,Cu)(In,Ga)Se2 solar cells.
  • Fiedler, Johannes; Persson, Clas & Buhmann, Stefan Yoshi (2019). Spectroscopy of nanoparticles without light.
  • Fiedler, Johannes; Persson, Clas; Boström, Mathias & Buhmann, Stefan Yoshi (2019). The dispersion trap.
  • Fiedler, Johannes; Persson, Clas & Buhmann, Stefan Yoshi (2019). Dispersion forces in inhomogeneous planarly layered media.
  • Fiedler, Johannes; Persson, Clas & Buhmann, Stefan Yoshi (2019). Impact of dispersion forces on the release dynamics of dissolved gasses.
  • Fiedler, Johannes; Persson, Clas & Buhmann, Stefan Yoshi (2019). Dispersion forces in inhomogeneous stratified media.
  • Boström, Anders Mathias; Corkery, Robert; Lima, Eduardo R. A.; Malyi, Oleksandr I.; Buhmann, Stefan Yoshi & Persson, Clas [Show all 9 contributors for this article] (2019). Ice Coatings Stabilised by Lifshitz Forces Can Induce a Size Dependent Float to Sink Transition for CO2 Gas Hydrate Clusters in Remote Water Worlds.
  • Grini, Sigbjørn; Ross, Nils; Liu, Xin; Platzer-Björkman, Charlotte; Persson, Clas & Vines, Lasse (2018). How is oxygen introduced in Cu2ZnSnS4 solar cell processing?
  • Sopiha, Kostiantyn; Malyi, Oleksandr; Persson, Clas & Wu, Ping (2018). Defect Compensation in n-type SnO2 by Oxygen Adsorption.
  • Sopiha, Kostiantyn; Malyi, Oleksandr; Persson, Clas & Wu, Ping (2018). Defect Compensation in SnO2: Role of Surface Oxygen Defects.
  • Malyi, Oleksandr; Sopiha, Kostiantyn & Persson, Clas (2018). Tailoring electronic properties of low-dimensional P-based systems by utilizing phosphorene reactivity.
  • Grini, Sigbjørn; Ross, Nils; Platzer-Björkman, Charlotte; Persson, Clas & Vines, Lasse (2018). Low temperature incorporation of selenium in Cu2ZnSnS4: Diffusion and nucleation.
  • Boström, Mathias; Thiyam, Priydarshini; Fiedler, Johannes; Persson, Clas; Berland, Kristian & Buhmann, Stefan Yoshi [Show all 9 contributors for this article] (2018). A habitat for life.
  • Berland, Kristian; Eliassen, Simen Nut Hansen; Løvvik, Ole Martin; Persson, Clas & Schrade, Matthias (2018). Computational Engineering of Thermoelectric Materials.
  • Fiedler, Johannes; Persson, Clas; Boström, Mathias & Buhmann, Stefan Yoshi (2018). Medium-assisted dispersion forces.
  • Thiyam, Priyadarshini; Parashar, Prachi; Shajesh, Kuloth Vayalombron; Malyi, Oleksandr; Boström, Mathias & Kimball, Milton A. [Show all 9 contributors for this article] (2018). Control of the sign and magnitude of Casimir-Lifshitz torque by material manipulation and intervening liquid medium.
  • Persson, Clas (2018). Copper-based chalcogenides for ultrathin inorganic solar cells.
  • Persson, Clas (2018). Cu‐X-chalcogenides for ultrathin solar cells.
  • Grini, Sigbjørn; Ross, Nils; Sopiha, Kostiantyn; Liu, Xin; Persson, Clas & Platzer-Björkman, Charlotte [Show all 7 contributors for this article] (2018). Introduction of oxygen into kesterite processing.
  • Berland, Kristian; Zamulko, Sergii & Persson, Clas (2017). Resolving fine features of the dielectric function: Computational issues and opportunities.
  • Sopiha, Kostiantyn; Malyi, Oleksandr; Persson, Clas & Wu, Ping (2017). Non-ionizing CO2 sensing with perovskite surfaces.
  • Berland, Kristian & Persson, Clas (2017). The need for dense Brillouin zone sampling in transport and optical calculations... and how to deal with it.
  • Berland, Kristian; Løvvik, Ole Martin & Persson, Clas (2017). How hybrid exchange affects thermoelectric transport properties of GaAs, PbTe, Cu2Se, and half Heuslers: Accurate grid sampling enabled with a corrected k.p scheme.
  • Persson, Clas (2017). Overview of ongoing projects in the UiO+KTH group.
  • Malyi, Oleksandr; Chen, Rongzhen & Persson, Clas (2017). Tailoring electronic and optical properties of semiconductors by amorphization.
  • Sopiha, Kostiantyn; Malyi, Oleksandr; Persson, Clas & Wu, Ping (2017). Effect of CO2 Adsorption on the Work Functions of SrTiO3(001) Surfaces.
  • Thiyam, Priyadarshini; Fiedler, Johannes; Buhmann, Stefan Yoshi; Persson, Clas; Brevik, Iver & Parsons, Drew F. [Show all 7 contributors for this article] (2017). Formation of ice below water surface via repulsive van der Waals and double-layer forces.
  • Berland, Kristian; Eliassen, Simen Nut Hansen; Schrade, Matthias; Tofan, Raluca; Guzik, Matylda Natalia & Gunnæs, Anette Eleonora [Show all 11 contributors for this article] (2017). Using theory to understand thermoelectric materials.
  • Nyberg, Fredrik; Løvvik, Ole Martin & Persson, Clas (2020). Ab initio calculation of the coefficient of thermal expansion and the secondary pyroelectric vector. Kjemisk Institutt, Universitetet i Oslo.
  • Mjærum, Dagfinn Olaf Øvrevik; Persson, Clas; Berland, Kristian & Løvvik, Ole Martin (2019). Layer Stacking and Electronic Properties of Hexagonal Covalent Organic Frameworks - A Computational Investigation with van der Waals Density Functional Theory. Fysisk institutt, Universitetet i Oslo.

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Published Feb. 1, 2011 3:05 PM - Last modified Jan. 27, 2021 5:23 PM