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EHF - OEO

The research of the OEO group is devoted to small molecular organic semiconductors

in nature-inspired and nature-mimicking light sensor,

as well as fundamental investigation of their EXCITONIC thin film properties and interface phenomena.

Organic Photodetectors (OPD) from homochiral materials are sensitive to the circular polarization state of light. They allow for polarization based information encoding in optical communication technologies.

Excitonic Circular Dichroism (ECD) is an optical property  in organic matter arising from the strucutral phenomenon of mirror-symmetry breaking in homochiral supramolecular aggregates. In thin films, it can by probed best by Mueller Matrix Ellipsometry. ECD is not necessarily a tiny quantity in organic matter, in some cases it can be giant.

Artificial Organic Photoreceptors (AOPR) are, via photoexcitation and capacitive coupling, able to electrically stimulate neuronal cells. They are envisioned as retinal implants for Vision Restoration (see also PRO-RETINA-Stiftung.

 

If you are interested in curiosity driven research and want to dedicate your experimental Bachelor or Master Thesis in Physics, Engineering Physics or (Physical) Chemistry to organic semiconductors, their circular dichroic properties and/or their application in opto-electronic devices, don't hesitate to contact me to hear about current project options:

Kontakt

Jun.-Prof. Dr. Manuela Schiek

Raum: W1-0-004

Tel.: +49 441 798 3988

manuela.schiek(at)uni-oldenburg.de

AKTUELLE PUBLIKATIONEN

Giant Intrinsic Circular Dichroism of Prolinol-Derived Squaraine Thin Films

by Matthias Schulz, Jennifer Zablocki, Oliya S. Abdullaeva, Frank Balzer, Arne Lützen, Oriol Arteaga, and Manuela Schiek

published in Nat. Commun. (2018) DOI: 10.1038/s41467-018-04811-7

 

Adsorption of Squaraine Molecules to Au(111) and Ag(001)  

by Mareike Luft, Boris Gross, Matthias Schulz, Arne Lützen, Manuela Schiek, and Niklas Nilius

published in J. Chem. Phys. 148 (2018) 074702 DOI: 10.1063/1.5017826

 

Spotlight on Excitonic Coupling in Polymorphic and Textured Anilino Squaraine Thin Films.

by Frank Balzer, Heiko Kollmann, Matthias Schulz, Gregor Schnakenburg, Arne Lützen, Marc Schmidtmann, Christoph Lienau, Martin Silies, and Manuela Schiek.

published in Cryst. Growth & Design (2017) DOI: 10.1021/acs.cgd.7b01131

 

Revealing the Recombination Dynamics in Squaraine-based Bulk Heterojunction Solar Cells

by Dorothea Scheunemann, Oliver Kolloge, Sebastian Wilken, Majvor Mack, Jürgen Parisi, Matthias Schulz, Arne Lützen, Manuela Schiek

published in Appl. Phys Lett. 111 (2017) 183502 DOI: 10.1063/1.4996080 

 

Quasi-One-Dimensional Cyano-Phenylene Aggregates: Uniform Molecule Alignement contrasts varying electrostatic Surface Potential

by Frank Balzer, Roland Resel, Arne Lützen, Manuela Schiek

published in J. Chem. Phys. 146 (2017) 134704 DOI: 10.1063/1.4979484

 

Organic Photodiodes from Homochiral L-Proline Derived Squaraine Compounds with Strong Circular Dichroism

by Matthias Schulz, Majvor Mack, Oliver Kolloge, Arne Lützen, Manuela Schiek

published in Phys. Chem. Chem. Phys. 19 (2017) 6996-7008 DOI: 10.1039/C7CP00306D

 

Assembly of Diverse Molecular Aggregates with a Single, Substrate-Directed Molecule Orientation

by Frank Balzer, Matthias Schulz, Arne Lützen, Manuela Schiek

published in Soft Matter 12 (2016) 9297-9302 DOI: 10.1039/C6SM01804A

OPEN ACCESS

 

Photoelectrical Stimulation of Neuronal Cells by an Organic Semiconductor-Electrolyte Interface

by Oliya S. Abdullaeva, Matthias Schulz, Frank Balzer, Jürgen Parisi, Arne Lützen, Karin Dedek, Manuela Schiek

published in Langmuir 32 (2016) 8533–8542 DOI: 10.1021/acs.langmuir.6b02085

 

Thin Film Phase and Local Chirality of Surface-Bound MOP4 Nanofibers

by Frank Balzer, Christian Röthel, Horst-Günter Rubahn, Arne Lützen, Jürgen Parisi, Roland Resel, Manuela Schiek

published in J. Phys. Chem. C 120 (2016) 7653-7661 DOI: 10.1021/acs.jpcc.6b01273

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