World's Best Scientists 2026 revealed!

D-Index & Metrics

Engineering and Technology

D-Index
42
Citations
7129
World Ranking
6559
National Ranking
215

Overview

Christian A. Kaufmann is affiliated with the Helmholtz-Zentrum Berlin für Materialien und Energie in Germany. Their research primarily spans several intersecting fields, including engineering and materials science, with a focus on electrical and electronic engineering, materials chemistry, and atomic and molecular physics.

The scientist's work emphasizes semiconductor materials and interfaces, chalcogenide semiconductor thin films, and perovskite materials and applications. Other notable topics covered in their research include quantum dots synthesis and properties, copper-based nanomaterials and applications, flood risk assessment and management, and silicon and solar cell technologies.

Christian A. Kaufmann has contributed extensively to academic literature. Selected recent papers include:

  • Perovskite/CIGS Tandem Solar Cells: From Certified 24.2% toward 30% and Beyond, 2022, ACS Energy Letters
  • Proton Radiation Hardness of Perovskite Tandem Photovoltaics, 2020, Joule
  • Advanced Characterization and Optimization of NiOx:Cu-SAM Hole-Transporting Bi-Layer for 23.4% Efficient Monolithic Cu(In,Ga)Se2-Perovskite Tandem Solar Cells, 2023, Advanced Functional Materials
  • Integration of rough RTP absorbers into CIGS-perovskite monolithic tandems by NiOx(:Cu)+SAM Hole-transporting Bi-layers, 2023, Solar Energy Materials and Solar Cells
  • Electronic Structure of the CdS/Cu(In,Ga)Se2 Interface of KF- and RbF-Treated Samples by Kelvin Probe and Photoelectron Yield Spectroscopy, 2021, ACS Applied Materials & Interfaces

Their frequent coauthors include:

  • Tim Kodalle
  • Tobias Bertram
  • Rutger Schlatmann
  • Iver Lauermann
  • R. Klenk

Christian A. Kaufmann's publications appear regularly in venues such as Solar Energy Materials and Solar Cells, ACS Applied Materials & Interfaces, Progress in Photovoltaics Research and Applications, Bautechnik, and the IEEE Journal of Photovoltaics.

Best Publications

  • Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells

    Amran Al-Ashouri;Artiom Magomedov;Marcel Roß;Marko Jošt

  • Perovskite/CIGS Tandem Solar Cells: From Certified 24.2% toward 30% and Beyond

    Unknown

  • Interpretation of admittance, capacitance-voltage, and current-voltage signatures in Cu(In,Ga)Se2 thin film solar cells

    Tobias Eisenbarth;Thomas Unold;Raquel Caballero;Christian A. Kaufmann

  • 21.6%-Efficient Monolithic Perovskite/Cu(In,Ga)Se2 Tandem Solar Cells with Thin Conformal Hole Transport Layers for Integration on Rough Bottom Cell Surfaces

    Marko Jošt;Tobias Bertram;Dibyashree Koushik;Jose A. Marquez

  • Proton Radiation Hardness of Perovskite Tandem Photovoltaics

    Felix Lang;Marko Jošt;Kyle Frohna;Eike Köhnen

  • The influence of Na on low temperature growth of CIGS thin film solar cells on polyimide substrates

    R. Caballero;C.A. Kaufmann;T. Eisenbarth;M. Cancela

  • Identifying the Real Minority Carrier Lifetime in Nonideal Semiconductors: A Case Study of Kesterite Materials

    Charles J. Hages;Alex Redinger;Sergiu Levcenko;Hannes Hempel

  • Experimental indication for band gap widening of chalcopyrite solar cell absorbers after potassium fluoride treatment

    P. Pistor;D. Greiner;C. A. Kaufmann;S. Brunken

  • Investigation of Cu(In,Ga)Se2 thin‐film formation during the multi‐stage co‐evaporation process

    R. Caballero;R. Caballero;C. A. Kaufmann;V. Efimova;T. Rissom

  • Transfer of Cu(In,Ga)Se2 thin film solar cells to flexible substrates using an in situ process control

    C.A. Kaufmann;A. Neisser;R. Klenk;R. Scheer

  • Junction formation by Zn(O,S) sputtering yields CIGSe‐based cells with efficiencies exceeding 18%

    Reiner Klenk;Alexander Steigert;Thorsten Rissom;Dieter Greiner

  • Comprehensive comparison of various techniques for the analysis of elemental distributions in thin films.

    D. Abou-Ras;R. Caballero;C.-H. Fischer;C.A. Kaufmann

  • Elucidating the Mechanism of an RbF Post Deposition Treatment in CIGS Thin Film Solar Cells

    Tim Kodalle;Marc D. Heinemann;Dieter Greiner;Hasan A. Yetkin

  • Depth profiling of Cu(In,Ga)Se2 thin films grown at low temperatures

    C.A. Kaufmann;R. Caballero;T. Unold;R. Hesse

  • Optical properties and mechanical stress in SiO2/Nb2O5 multilayers

    F Richter;H Kupfer;P Schlott;T Gessner

  • Influence of Na on Cu(In,Ga)Se2 solar cells grown on polyimide substrates at low temperature: Impact on the Cu(In,Ga)Se2/Mo interface

    R. Caballero;C. A. Kaufmann;T. Eisenbarth;A. Grimm

  • CuIn1−xGaxSe2-based thin-film solar cells by the selenization of sequentially evaporated metallic layers

    R. Caballero;C. Guillén;M. T. Gutiérrez;C. A. Kaufmann

  • Impact of the Ga concentration on the microstructure of CuIn1–xGaxSe2

    D. Abou-Ras;R. Caballero;C. A. Kaufmann;M. Nichterwitz

  • Surface Cu depletion of Cu(In,Ga)Se2 films: An investigation by hard X-ray photoelectron spectroscopy

    H. Mönig;H. Mönig;Ch.-H. Fischer;Ch.-H. Fischer;R. Caballero;C.A. Kaufmann

  • Characterization of metastabilities in Cu(In,Ga)Se2 thin-film solar cells by capacitance and current-voltage spectroscopy

    Tobias Eisenbarth;Raquel Caballero;Melanie Nichterwitz;Christian A. Kaufmann

  • Direct evidence for a reduced density of deep level defects at grain boundaries of Cu(In,Ga)Se2 thin films.

    H. Mönig;H. Mönig;Y. Smith;Y. Smith;R. Caballero;C. A. Kaufmann

  • Properties of CuInS2 thin films grown by a two-step process without H2S

    R. Klenk;U. Blieske;V. Dieterle;K. Ellmer

Frequent Co-Authors

Thomas Unold
Thomas Unold Helmholtz-Zentrum Berlin für Materialien und Energie
Reiner Klenk
Reiner Klenk Helmholtz-Zentrum Berlin für Materialien und Energie
Roland Scheer
Roland Scheer Martin Luther University Halle-Wittenberg
Daniel Abou-Ras
Daniel Abou-Ras Helmholtz-Zentrum Berlin für Materialien und Energie
Susan Schorr
Susan Schorr Helmholtz-Zentrum Berlin für Materialien und Energie
Sascha Sadewasser
Sascha Sadewasser International Iberian Nanotechnology Laboratory
Bernd Rech
Bernd Rech Helmholtz-Zentrum Berlin für Materialien und Energie
Steve Albrecht
Steve Albrecht Technical University of Berlin
Alejandro Pérez-Rodríguez
Alejandro Pérez-Rodríguez University of Barcelona
M.Ch. Lux-Steiner
M.Ch. Lux-Steiner Johannes Kepler University of Linz

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