Prof. Thomas Dittrich
Helmholtz-Center Berlin for Materials and Energy, Germany
Prof. Thomas Dittrich, Helmholtz-Center Berlin for Materials and Energy, Germany
Charge separation in photo-active materials plays a decisive role for applications in photovoltaics and photo-catalysis. Surface photovoltage (SPV) techniques can provide information, for example, about fundamental properties and stability of related materials and their interfaces. In the presentation, principles of SPV measurements in the Kelvin-probe and fixed capacitor arrangements will be introduced and illustrated with some examples including chalcopyrite [1], kesterite [2] and perovskite [3] absorbers as well as charge transfer across nano-porous electrodes [4] and organic [5] or quantum dot monolayers [6].
[1] Th. Dittrich et al., Thin Solid Films 535 (2013) 357; Y. P. Fu et al., Prog. Photovolt.: Research and Applications 22 (2014) 44; M. Pomaska et al., Solar Energy Materials & Solar Cells 132 (2015) 303.
[2] X. Z. Lin et al., Appl. Phys. Lett. 102 (2013) 143903; X. Lin et al., Appl. Phys. Lett. 106 (2015) 013903
[3] A. Naikeaw et al., Appl. Phys. Lett. 106 (2015) 232104; T. Supasai et al., Appl. Phys. Lett. 103 (2013) 183906.
[4] V. Duzhko et al., Phys. Rev. B 64 (2001) 0752041-07520417; V. Duzhko et al., J. Appl. Phys. 91 (2002) 9432.
[5] S. Fengler et al., J. Appl. Phys. (2015) submitted; L. Macor et al., RSC Advances 2 (2012) 4869
[6] D. Gross et al., J. Am. Chem. Soc. 132 (2010) 5981; E. Zillner et al., J. Phys. Chem. C 116 (2012) 16747; M. Otero et al., Electrochimica Acta (2015) 316.
Biography
After finishing diploma and PhD at the Moscow State University, Th. Dittrich worked at the former Academy of Sciences of the former GDR, at the former Hahn-Meitner-Institute, at the Technical University of Munich and became a group leader at the Helmholtz-Center Berlin for Materials and Energy. Th. Dittrich is a co-author of more than 190 publications in fields of materials science and photovoltaics and the author of a textbook (Materials Concepts for Solar Cells, ICP 2015).