Karlsruhe Institute of Technology (LTI)

The Printed Electronics Group of the Light Technology Institute (LTI) of the Karlsruhe Institute of Technology (KIT) at InnovationLab is led by Prof. Uli Lemmer and Dr. Gerardo Hernandez-Sosa.

The Printed Electronics group of LTI investigates materials and advanced device architectures for the fabrication of optoelectronic systems by using industrially relevant techniques. A central part of the research activities is the development of ink formulations and printing processes to control the performance of printed devices. Moreover, we investigate the integration of printed organic electronic devices in complex systems. Hernandez-Sosa BMBF funded junior research group works on the use of biodegradable/biocompatible materials for the fabrication of optoelectronic devices. The rationale is the combination of state-of-the-art high-throughput printing techniques with the topic of more sustainable and “greener” technologies. 

Color-selective Printed Organic Photodiodes for Filterless Multichannel Visible Light Communication
N. Strobel, N. Droseros, W. Köntges, M. Seiberlich, M. Pietsch, S. Schlisske, F. Lindheimer, R. R. Schröder, U. Lemmer, M. Pfannmöller, N. Banerji, G. Hernandez-Sosa
Advanced Materials, 1908258 (2020)

Inkjet Printed Electrochromic and Electrofluorochromic Polymer-based Dual-mode Displays
M. Pietsch, T. Rödlmeier, S. Schlisske, J. Zimmermann, C. Romero-Nieto, G. Hernandez-Sosa
Journal of Materials Chemistry C, 7, 7121 (2019)

Printed Organic Photodiodes: Benchmarks, Processing and Applications
(Invited Review)

N. Strobel, M. Seiberlich, R. Eckstein, U. Lemmer, G. Hernandez-Sosa
Flexible and Printed Electronics. 4, 043001 (2019)

Non-Fullerene Based Printed Organic Photodiodes with High Responsivity and Megahertz Detection Speed
N. Strobel, M. Seiberlich, T. Rödlmeier, U. Lemmer, G. Hernandez-Sosa
ACS Applied Materials and Interfaces, 10, 42733 (2018)

Ultrathin Fully Printed Light‐Emitting Electrochemical Cells with Arbitrary Designs on Biocompatible Substrates
J. Zimmermann, S.Schlisske, M. Held, J.-N. Tisserant, L. Porcarelli, A. Sanchez-Sanchez, D. Mecerreyes, G. Hernandez-Sosa
Advanced Materials Technologies, 1800641 (2019)

Fully Digitally Printed Image Sensor Based on Organic Photodiodes
Ralph Eckstein, Noah Strobel, Tobias Rödlmeier, Konstantin Glaser, Uli Lemmer, Gerardo Hernandez‐Sosa
Advanced Optical Materials 1701108, (2018)

Design and Color Flexibility for Inkjet-printed Perovskite Photovoltaics
S. Schlisske, F. Mathies, D. Busko, N. Strobel, T. Rödlmeier, U. Lemmer, R. B. Richards, U. W. Paetzold, G. Hernandez-Sosa, E. Klampaftis
ACS Applied Energy Materials, 2, 764 (2018)

Fully Printed Light‐Emitting Electrochemical Cells Utilizing Biocompatible Materials
Johannes Zimmermann, Luca Porcarelli, Tobias Rödlmeier, Ana Sanchez‐Sanchez, David Mecerreyes, Gerardo Hernandez‐Sosa
Advanced Functional Materials, 170595 (2017)

Sulfone-Based Deep Blue Thermally Activated Delayed Fluorescence Emitters: Solution-Processed Organic Light-Emitting Diodes with High Efficiency and Brightness
Nils Jürgensen, Andreas Kretzschmar, Stefan Höfle, Jan Freudenberg, Uwe HF Bunz, Gerardo Hernandez-Sosa
Chemistry of Materials, 29, 9154 (2017)

Semiconductor: Insulator Blends for Speed Enhancement in Organic Photodiodes
Noah Strobel, Ralph Eckstein, Jonathan Lehr, Uli Lemmer, Gerardo Hernandez‐Sosa
Advanced Electronic Materials, 1700345 (2017)

Controlled Molecular Orientation of Inkjet Printed Semiconducting Polymer Fibers by Crystallization Templating
Tobias Rödlmeier, Tomasz Marszalek, Martin Held, Sebastian Beck, Christian Müller, Ralph Eckstein, Anthony J Morfa, Robert Lovrincic, Annemarie Pucci, Uli Lemmer, Jana Zaumseil, Wojciech Pisula, Gerardo Hernandez-Sosa
Chemistry of Materials, 29, 10150 (2017)

Solution-Processed Bio-OLEDs with a Vitamin-Derived Riboflavin Tetrabutyrate Emission Layer
Nils Jürgensen, Maximilian Ackermann, Tomasz Marszalek, Johannes Zimmermann, Anthony J Morfa, Wojciech Pisula, Uwe HF Bunz, Felix Hinkel, Gerardo Hernandez-Sosa
ACS Sustainable Chem. Eng. 5, 5368 (2017)

Digitally Printed Dewetting Patterns for Self‐Organized Microelectronics
Ralph Eckstein, Milan Alt, Tobias Rödlmeier, Philip Scharfer, Uli Lemmer, Gerardo Hernandez‐Sosa
Advanced Materials, 28, 7708 (2016)

Group Leader

Prof. Dr. Gerardo Hernandez-Sosa

Head of the Printed Electronics Group and BMBF Junior Group BioLICHT (iL)
Contact via Email
Room: E 4.02

Phone: +49 (0) 6221 54 19 134 (iL)

Postdoctoral Researchers

Ali Tunc, Dr.

Postdoctoral Researcher
Contact via Email
Room: E 4.02

Phone: +49 (0) 6221 54 19 122 (iL)

PhD Students

Luis Ruiz Preciado, M. Sc.

PhD student
Contact via Email

Phone: +49 (0) 6221 54 19 128 (iL)

Christian Rainer, M. Sc.

PhD student
Contact via Email

Phone: +49 (0) 6221 54 19 140 (iL)

Kai Xia, M. Sc.

PhD student
Contact via Email
Room: E 4.13

Phone: +49 (0) 6221 54 19 140 (iL)

Peter Krebsbach, B. Sc.

PhD Student
Contact via Email
Room: E 4.10

Phone: +49 (0) 6221 54 19 130 (iL)

Srikanth Doddapaneni, M. Sc.

PhD Student
contact via email
Room: E 4.02

Phone: +49 (0) 6221 54 19 140 (iL)

Ozan Karakaya, M. Sc.

PhD Student
contact via email
Room: E 4.10

Phone: +49 (0) 6221 54 19 122 (iL)

Master & Bachelor

Former Members

Doctoral Researchers:

  • Manuel Pietsch, Dr.-Ing.            
  • Stefan Schlisske, Dr.-Ing.             [Nano Dimension]
  • Noah Strobel, Dr.-Ing.                   [BASF SE]
  • Johannes Zimmermann, Dr-ing.   [InnovationLab GmbH]
  • Nils Jürgensen, Dr.-Ing.                [LQ Mechatronik-Systeme GmbH]
  • Serpil Tekoglu, Dr.-Ing.                 [Johannes Kepler University]
  • Sebastian Stolz, Dr. -Ing.              [Merck KGaA]
  • Ralph Eckstein, Dr.-Ing.                [Dentsply Sirona]
  • Florian Mathies, Dr.-Ing.               [Helmholtz-Zentrum Berlin]
  • Tobias Rödlmeier, Dr.-Ing.            [BASF 3D Printing Solutions]

Posdoctoral Researchers:

  • Sanghoon Baek Dr.        
  • Aleksandr Perevedentsev Dr. [ICMAB-CSIC]
  • Frida Lindberg, Dr.
  • Martin Held, Dr.                       [Helmholtz-Zentrum Geesthacht]
  • Anthony Morfa, Dr.                  [The University of Sydney]

For a complete List of publications of Gerardo Hernandez-Sosa and Uli Lemmer please refer to their Google Scholar profiles.