SPM-Lab
The Scanning Probe Microscopy Laboratory was founded in 2017 by Alex Redinger in a framework of an FNR consolidator grant.
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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
Two good news this week. Firstly, we warmly welcome our new PhD student Anjala Jayaraj. She will be working on the fabrication of Sn-based perovskites and their characterizations. Secondly, we can finally go back to our labs and continue our measurements where we left them off !
Starting today and because of the COVID-19 outbreak, we will be working from home to preserve our group members' safety. We have a lot of data to analyse, papers to read and papers to write. All measurements are on hold and we hope to come back soon in our labs.
If EMRS and MRS conferences do no get canceled, Thibaut will give a talk on how stoichiometry alters the stability of MAPI at MRS. Evandro will give a turorial on Scanning Probe Microscopy, Christian will present a poster on CIGS and Alex will give a talk on KPFM of perovskite/CIGS at EMRS.
We welcome our new PhD student, Himanshu Phirke, who will work on the optical and electrical characterization of perovskite, CIGSe and photoferroelectric materials. This includes the development of a hyperspectral TRPL imaging setup and SPM measurements.
Recent Publications
April 2020
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
February 2020
Effects of Annealing and Light on Co-evaporated Methylammonium Lead Iodide Perovskites using Kelvin Probe Force Microscopy in Ultra-High Vacuum
Thibaut Gallet, Evandro M. Lanzoni and Alex Redinger
2019 IEEE 46th Photovoltaic Specialists Conference (PVSC), Chicago, IL, USA, 2019, pp. 1477-1482.
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Surface characterization of epitaxial Cu-rich CuInSe2 absorbers
Evandro M. Lanzoni, Conrad Spindler, Omar Ramirez, Michele Melchiorre, Susanne Siebentritt and Alex Redinger
2019 IEEE 46th Photovoltaic Specialists Conference (PVSC), Chicago, IL, USA, 2019, pp. 2346-2350
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September 2019
Fermi-level pinning in methylammonium lead iodide perovskites
Thibaut Gallet, David Grabowski, Thomas Kirchartz and Alex Redinger
Nanoscale, 2019, 11, 16828-16836
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Upcoming Events
1st Virtual Chalcogenide PV Conference
HZB, AIST, CNRS, IPVF, EPFL, EMPA, Colorado State University, University of Luxembourg
25.05.2020 - 28.05.2020
Levitons: on-demand electrons for Electron Quantum Optics
Dr. Christian Glattli, CEA Saclay, Université Paris-Saclay, France
27.05.2020