Research fields

Electronic structure of semiconductors, water-semiconductor interface, III-V semiconductors on Si for solar water-splitting, charge-density waves.


Personal Website:


Publications (HZB-related)


May, M.M.: Effiziente Erzeugung regenerativer Brennstoffe über die solare Wasserspaltung. Naturwissenschaftliche Rundschau : NR 72 (2019), p. 10-15

May, M.M.; Rehfeld, K.: ESD Ideas: Photoelectrochemical carbon removal as negative emission technology. Earth System Dynamics 10 (2019), p. 1-7

May, M.M.; Stange, H.; Weinrich, J.; Hannappel, T.; Supplie, O.: The impact of non-ideal surfaces on the solid–water interaction: a time-resolved adsorption study. SciPost Physics 6 (2019), p. 58/1-13

Mohamed, M.; May, M.M.; Kanis, M.; Brützam, M.; Uecker, R.; Van De Krol, R.; Janowitz, C.; Mulazzi, M.: The electronic structure and the formation of polarons in Mo-doped BiVO4 measured by angle-resolved photoemission spectroscopy. RSC Advances 9 (2019), p. 15606-15614


Cheng, W.-H.; Richter, M.H.; May, M.M.; Ohlmann, J.; Lackner, D.; Dimroth, F.; Hannappel, T.; Atwater, H.A; Lewerenz, H.-J.: Monolithic Photoelectrochemical Device for Direct Water Splitting with 19% Efficiency. ACS Energy Letters 3 (2018), p. 1795-1800


May, M.M.; Lackner, D.; Ohlmann, J.; Dimroth, F.; van de Krol, R.; Hannappel, T.; Schwarzburg, K.: On the benchmarking of multi-junction photoelectrochemical fuel generating devices. Sustainable Energy & Fuels 1 (2017), p. 492-503


May, M.M.; Lewerenz, H.-J.; Lackner, D.; Dimroth, F.; Hannappel, T.: Efficient direct solar-to-hydrogen conversion by in situ interface transformation of a tandem structure. Nature Communications 6 (2015), p. 8286

May, Matthias M.: GaP- and InP-based Surfaces for Solar Water Splitting. , 2015
Humboldt-Universität zu Berlin

Supplie, O.; May, M.M.; Höhn, C.; Stange, H.; Müller, A.; Kleinschmidt, P.; Brückner, S.; Hannappel, T.: Formation of GaP/Si(100) heterointerfaces in the presence of inherent reactor residuals. ACS Applied Materials & Interfaces 7 (2015), p. 9323–9327

Supplie, O.; May, M.M.; Kleinschmidt, P.; Naegelein, A.; Paszuk, A.; Brückner, S.; Hannappel, T.: In situ controlled heteroepitaxy of single-domain GaP on As-modified Si(100). APL Materials 3 (2015), p. 126110/1-6

Supplie, O.; May, M.M.; Steinbach, G.; Romanyuk, O.; Grosse, F.; Nägelein, A.; Kleinschmidt, P.; Brückner, S.; Hannappel, T.: Time-resolved in situ spectroscopy during formation of the GaP/Si(100) heterointerface. Journal of Physical Chemistry Letters 6 (2015), p. 464-469


May, M.M.; Lewerenz, H.-J.; Hannappel, Th.: Optical in Situ Study of InP(100) Surface Chemistry: Dissociative Adsorption of Water and Oxygen. The Journal of Physical Chemistry C 118 (2014), p. 19032–19041

Ramirez, A.; Hillebrand, P.; Stellmach, D.; May, M.M.; Bogdanoff, P.; Fiechter, S.: Evaluation of MnOx, Mn2O3, and Mn3O4 Electrodeposited Films for the Oxygen Evolution Reaction of Water. The Journal of Physical Chemistry C 118 (2014), p. 14073-14081

Sippel, P.; Supplie, O.; May, M.M.; Eichberger, R.; Hannappel, T.: Electronic structures of GaP(100) surface reconstructions probed with two-photon photoemission spectroscopy. Physical Review B 89 (2014), p. 165312/1-8

Supplie, O.; Brückner, S.; Romanyuk, O.; Döscher, H.; Höhn, C.; May, M.M.; Kleinschmidt, P.; Grosse, F.; Hannappel, T.: Atomic scale analysis of the GaP/Si(100) heterointerface by in situ reflection anisotropy spectroscopy and ab initio density functional theory. Physical Review B 90 (2014), p. 235301/1-7

Supplie, O.; May, M.M.; Stange, H.; Höhn, C.; Lewerenz, H.-J.; Hannappel, T.: Materials for light-induced water splitting: In situ controlled surface preparation of GaPN epilayers grown lattice-matched on Si(100). Journal of Applied Physics 115 (2014), p. 113509/1-7


Abdi, F.F.; Savenije, T.J.; May, M.M.; Dam, B.; van de Krol, R.: The Origin of Slow Carrier Transport in BiVO4 Thin Film Photoanodes: A Time-Resolved Microwave Conductivity Study. Journal of Physical Chemistry Letters 4 (2013), p. 2752-2757

Hannappel, Th.; May, M.M.; Lewerenz, H.-J.: Epitaxial III-V Thin Film Absorbers: Preparation, Efficient InP Photocathodes and Routes to High Efficiency Tandem Structures. In: Lewerenz, H.-J.; Laurence, P. [Eds.] : Photoelectrochemical Water Splitting : Materials, Processes and Architectures. London: RSC Publ., 2013. - ISBN 978-1-84973-647-3, p. 223-265

May, M.M.; Supplie, O.; Höhn, C.; Zabka, W.-D.; Lewerenz, H.-J.; van de Krol, R.; Hannappel, T.: Water-induced modifications of GaP(100) and InP(100) surfaces studied by photoelectron spectroscopy and reflection anisotropy spectroscopy. In: Kanai, Y. [u.a.] [Eds.] : Solar Hydrogen and Nanotechnology VIII. San Diego, California, United States, August 25, 2013 . Bellingham, Wash.: SPIE, 2013 (Proceedings of SPIE ; 8822), p. 88220M/1-7

May, M.M.; Supplie, O.; Höhn, Ch.; van de Krol, R.; Lewerenz, H.-J.; Hannappel, T.: The interface of GaP(100) and H2O studied by photoemission and reflection anisotropy spectroscopy. New Journal of Physics 15 (2013), p. 103003/1-17


Döscher, H.; Supplie, O.; May, M.M.; Sippel, P.; Heine, C.; Munoz, A.G.; Eichberger, R.; Lewerenz, H.-J.; Hannappel, T.: Epitaxial III-V Films and Surfaces for Photoelectrocatalysis. ChemPhysChem 13 (2012), p. 2899-2909


May, M.M.; Brabetz, C.; Janowitz, C.; Manzke, R.: The influence of different growth conditions on the charge density wave transition of 1T-TiSe2. Journal of Electron Spectroscopy and Related Phenomena 184 (2011), p. 180-183

May, M.M.; Brabetz, C.; Janowitz, C.; Manzke, R.: Charge-Density-Wave Phase of 1T-TiSe2: The Influence of Conduction Band Population. Physical Review Letters 107 (2011), p. 176405/1-4