M
Markus Kohlstädt
Researcher at University of Freiburg
Publications - 34
Citations - 504
Markus Kohlstädt is an academic researcher from University of Freiburg. The author has contributed to research in topics: Perovskite (structure) & Silicon. The author has an hindex of 11, co-authored 30 publications receiving 358 citations. Previous affiliations of Markus Kohlstädt include Centre national de la recherche scientifique & Fraunhofer Society.
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Journal ArticleDOI
Characterization of perovskite solar cells: Towards a reliable measurement protocol
Eugen Zimmermann,Ka Kan Wong,Michael Müller,Hao Hu,Philipp Ehrenreich,Markus Kohlstädt,Markus Kohlstädt,Uli Würfel,Uli Würfel,Simone Mastroianni,Gayathri Mathiazhagan,Andreas Hinsch,Tanaji P. Gujar,Mukundan Thelakkat,Thomas Pfadler,Lukas Schmidt-Mende +15 more
TL;DR: In this article, the authors compare device characteristics derived from standard current density-voltage measurements with stabilized values obtained from an adaptive tracking of the maximum power point and the open circuit voltage as well as characteristics extracted from time resolved current density voltage measurements, and propose a measurement protocol for a reliable characterisation which is easy to implement and has been tested on varying perovskite ÃÂÃÂsolar cells fabricated in different laboratories.
Journal ArticleDOI
Assembly of the Escherichia coli NADH:ubiquinone oxidoreductase (complex I).
Daniel Schneider,Thomas Pohl,Julia Walter,Katerina Dörner,Markus Kohlstädt,Annette Berger,Volker Spehr,Thorsten Friedrich +7 more
TL;DR: It was shown that the mitochondrial complex is assembled from distinct intermediates, and the subunits and the cofactors of the soluble NADH dehydrogenase fragment of the complex were detected in the cytoplasm of some of the nuo-mutants.
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How Molecules with Dipole Moments Enhance the Selectivity of Electrodes in Organic Solar Cells - A Combined Experimental and Theoretical Approach
Uli Würfel,Uli Würfel,Martin Seßler,Moritz Unmüssig,Nils Hofmann,Mathias List,Eric Mankel,Thomas Mayer,Günter Reiter,Jean-Luc Bubendorff,L. Simon,Markus Kohlstädt +11 more
TL;DR: In this paper, a combination of currentvoltage curves, scanning Kelvin-probe atomic force microscopy, ultraviolet photoelectron spectroscopy, and electroluminescence measurements as well as numerical simulations are carried out to clarify in detail the underlying mechanisms.
Journal ArticleDOI
Electron-selective contacts via ultra-thin organic interface dipoles for silicon organic heterojunction solar cells
Christian Reichel,Uli Würfel,Uli Würfel,Kristina Winkler,Hans-Frieder Schleiermacher,Hans-Frieder Schleiermacher,Markus Kohlstädt,Markus Kohlstädt,Moritz Unmüssig,Christoph Messmer,Martin Hermle,Stefan W. Glunz,Stefan W. Glunz +12 more
TL;DR: In this paper, the dipole effect plays an essential role in the modification of the interface and effective work function of the contact and the effect of an added fluorosurfactant on the resulting contact properties was examined.
Journal ArticleDOI
Ordering of PCDTBT revealed by time-resolved electron paramagnetic resonance spectroscopy of its triplet excitons.
Till Biskup,Michael Sommer,Stephan Rein,Deborah L. Meyer,Markus Kohlstädt,Uli Würfel,Stefan Weber +6 more
TL;DR: Time-resolved electron paramagnetic resonance (TREPR) spectroscopy is shown to be a powerful tool to characterize triplet excitons of conjugated polymers, and the results are highly sensitive to the orientation of the molecule.