SPM-Lab
The Scanning Probe Microscopy Laboratory was founded in 2017 by Alex Redinger in a framework of an FNR consolidator grant.
The group focuses on the study of the surface of two types of thin film solar cells, namely Cu(In,Ga)Se2 (CIGSe) and hybrid organic inorganic perovskites, as well as 2D materials. We combine scanning probe microscopy techniques in ultra-high vacuum such as Scanning Tunneling Spectroscopy (STS) and Kelvin Probe Force Microscopy (KPFM) and photoluminescence imaging (PL/TRPL) to access the electrostatic and optoelectronic properties at the surface of semiconductors.
Latest News
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15/07/2021
In July, we wecolmed our second PostDoc, Dr. Ajay Singh. He recently submitted his PhD at the Technical University of Munich, Germany. He will work on applying novel growth and characterization techniques to produce highly efficicent halide perovskite solar cells via multi-stage co-evaporation. Good luck to him !
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24/06/2021
Our paper on the impact of KPFM operation modes and environment on grain boundaries band bending in perovskite and CIGS is now out and published in Nano Energy. You can read it following this link: https://www.sciencedirect.com/science/article/pii/S2211285521005255Congratulations to everyone involved !
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22/06/2021
We are extremely happy that our group and research are featured in the #letzSCIENCE campaing of the Fonds Nationals de la Recherche ! A KPFM overlay of a perovskite absorber is displayed on larger 2m posters at all tram stations in Luxembourg and in selected buses !! Go read the story behind the image and have a augmented reality experience of solar energy : https://letzscience.fnr.lu/solar-energy-a-science-with-many-layers
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08/06/2021
We warmly welcome our first PostDoc, Dr. Jeremy Hieulle. He was previously a PostDoc in the groups of José Ignacio Pascual at CIC nanoGUNE, Spain and Yabing Qi at OIST, Japan. Within our group, he will work on upgrading the UHV SPM/XPS system with UPS and study halide perovskites by combining these different techniques. We are happy to have you with us Jeremy !
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15/04/2021
We warmly welcome Robert Himelrick in our group, who will be our new R&D-mechanical engineer and technician. Looking forward to setting up new experiments and tools !
Recent Publications
Evandro M. Lanzoni, Thibaut Gallet, Conrad Spindler, Omar Ramirez, Chrisitan Kameni Boumenou, Susanne Siebentritt and Alex Redinger
Thibaut Gallet, Ricardo G. Poeira, Evandro M. Lanzoni, Tobias Abzieher, Ulrich W. Paetzold and Alex Redinger
ACS Appl. Mater. Interfaces 2021, 13, 2, 2642–2653
Electronic and compositional properties of the rear‐side of stoichiometric CuInSe2 absorbers
Christian Kameni Boumenou, Amala Elizabeth, Finn Babbe, Alice Debot, Harry Mönig and Alex Redinger
Prog Photovolt Res Appl. 2020; 1– 11
Passivation of the CuInSe2 surface via cadmium pre-electrolyte treatment
Christian Kameni Boumenou, Finn Babbe, Amala Elizabeth, Michele Melchiorre, Conrad Spindler, Jérome Guillot, Harry Mönig, Susanne Siebentritt and Alex Redinger
Phys. Rev. Materials 4 (4), 045405