InnovationLab GmbH | Speyerer Street 4 | 69115 Heidelberg
Karlsruhe Institute of Technology
Light TechnologyInstitute (LTI)
The research group of the Light Technology Institute (LTI) at the Karlsruhe Institute of Technology (KIT) located at InnovationLab is led by Prof. Dr. Uli Lemmer, Prof. Dr. Gerardo Hernández-Sosa, and Prof. Dr. Ulrich Wilhelm Paetzold.
Their focus is on investigating materials and advanced component architectures for the fabrication of printed optoelectronic systems using industry-relevant technologies.
Component Architecture...
... using "Printed Electronics"
The LTI research group "Printed Electronics" investigates novel materials and complex component architectures for the fabrication of optoelectronic systems using industry-relevant printing technologies. Current research topics include light-emitting diodes (LEDs), solar cells, and photodiodes. A central part of the research activities involves the development of corresponding ink formulations and printing processes to enhance the performance of printed components.
Furthermore, the integration of printed organic-electronic components into complex systems is investigated. Additionally, the group of Prof. Dr. Hernández-Sosa focuses on the use of biodegradable and biocompatible materials for the fabrication of optoelectronic devices. The fundamental principle consistently involves combining state-of-the-art printing techniques with the theme of more sustainable and environmentally friendly materials to produce cost-effective and "green" electrical components. This spans from fundamental research to the development of new system solutions.
Research Highlights

A complete list of publications can be found on the Google Scholar profiles of the group leaders:
Prof. Dr. Gerardo Hernández-Sosa, Prof. Dr. rer. nat. Ulrich W. Peatzold and Prof. Dr. rer. nat. Uli Lemmer.
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. Hernández‒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. Hernández-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. Hernández-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. Hernández-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. Hernández-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 Hernández‐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. Hernández-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 Hernández‐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 Hernández-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 Hernández‐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 Hernández-Sosa
Chemistry of Materials, 29, 10150 (2017)

Vitamin B OLED
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 Hernández-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)

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. Hernández‒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. Hernández-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. Hernández-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. Hernández-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. Hernández-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 Hernández‐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. Hernández-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 Hernández‐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 Hernández-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 Hernández‐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 Hernández-Sosa
Chemistry of Materials, 29, 10150 (2017)

Vitamin B OLED
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 Hernández-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 Leaders

Staff

Ali Tunc, Dr.
Postdoctoral Researcher
Christian Rainer, M. Sc.
PhD Student
Kai Xia, M. Sc.
PhD Student
Peter Krebsbach, B. Sc.
PhD Student
Srikanth Doddapaneni, M. Sc.
PhD Student
Ozan Karakaya, M. Sc.
PhD Student
Theresa Küchle, M. Sc.
PhD Student
Uma Dangudubiyyam, M. Sc.
PhD Student
Former Staff

Upon successful completion, former doctoral candidates and postdocs have pursued diverse career paths in academia and industry:
Former Doctoral Candidates
13+
Former Postdocs
5+








Gallery

Funding

This research is funded by:
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