apl.-Prof. Dr. Manuela Schiek

Team OEO

Optoelektronische Organik (OEO)

OEO - Optoelectronic Organics

Molecular Excitonics meets Bioelectronics

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

  • their structure correlated excitonic properties, especially chirality routed excitonic circular dichroism
  • and interface phenomena, especially at solid-liquid interfaces
  • as well implementaion into opto-bio-electronic sensing devices.

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.

Imaging Mueller Matrix Ellispometry, which adds microscopic spatial resolution, allows to study micro-textured thin films in a quantitative fashion to obtain for instance the local chiroptical response or the complex dielectric tensor.

Organic photodetectors based on homochiral materials are intriniscally sensitive to the circular polarization state of light without the need for polarization manipulating elements. They allow for polarization based information encoding in optical communication technologies.

Transient photovoltaic neuro-stimulating platforms are, via photoexcitation and capacitive coupling, able to electrically stimulate neuronal cells. They are envisioned as minimal invasive, wireless retinal implants for Vision Restoration (see also PRO-RETINA-Stiftung).

The interface of the organic photosenosor to the physiological environment is decisive for the stimulation process. Therefore, it is especially examined by in operando spectroscopic ellipsometry combined with electrochemical analysis.


Organic Semiconductor - Electrolyte Interfaces for Neuronal Stimulation

... join in via an IASTE paid internship - position filled.

Funding was granted by the Linz Institute of Technology at the Johannes Kepler University.

Understanding and subsequent optimization of Bio-Opto-Electronic Interfaces to a Physiological Electrolyte by in operando Ellipsometric Spectro-Electrochemistry is the scope of the project.

Solar Cell in your Eyes (news article)

... in German only: Die Solarzelle im Auge

Colorful ... (news article)

 in German only: Von Blutrot bis Azurblau

PhD thesis Dr. Oliya Abdullaeva

Congratulations to your successful defense of PhD thesis!

Manuela Schiek "Physikerin der Woche 2019"

Recent Publications

see also: Google Scholar and ORCiD

some poster reprints are available on ResearchGate

  • Sebastian Funke, Matthias Duwe, Frank Balzer, Peter H. Thiesen, Kurt Hingerl, Manuela SCHIEK. Determining the Dielectric Tensor of Micro-Textured Organic Thin Films by Imaging Ellipsometry. J. Phys. Chem. Lett. (2021) DOI: 10.1021/acs.jpclett.1c00317
  • Optical Index Matching, Flexible Electrospun Substrates for Seamless Organic Photocapacitive Sensors. by T. Grothe, T. Böhm, K. Habashy, O. S. Abdullaeva, J. Zablocki, A. Lützen, K. Dedek, Manuela SCHIEK, A. Ehrmann. phys. status solidi B (2021) DOI: 10.1002/pssb.202000543.
  • Structure and Dielectric Properties of Anisotropic n-alkyl Anilino Squaraine Thin Films. by Jennifer Zablocki, Matthias Schulz, Gregor Schnakenburg, Luca Beverina, Philip Warzanowski, Alessandro Revelli, Markus Grüninger, Frank Balzer, Klaus Meerholz, Arne Lützen, Manuela SCHIEK. Journal of Physical Chemistry C (2020) DOI: 10.1021/acs.jpcc.0c07498
  • Polymorphic Chiral Squaraine Crystallites in Textured Thin Films. by Jennifer Zablocki, Oriol Arteaga, Frank Balzer, Dirk Hertel, Julian J. Holstein, Guido Clever, Jana Anhäuser, Rakesh Puttreddy, Kari Rissanen, Klaus Meerholz, Arne Lützen, Manuela Schiek. Chirality (2020) DOI: 10.1002/chir.23213
  • Nanoscale Polarization-Resolved Surface Photovoltage of a Pleochroic Squaraine Thin Film. by Frank Balzer, Oliya S. Abdullaeva, Angelika Maderitsch, Matthias Schulz, Arne Lützen, Manuela Schiek. to be published in Physica Status Solidi (b) (2020) DOI: 10.1002/pssb.201900570
  • Effect of Imbalanced Charge Transport on the Interplay of Surface and Bulk Recombination in Organic Solar Cells
    by Dorothea Scheunemann, Sebastian Wilken, Oskar J. Sandberg, Ronald Österbacka, Manuela Schiek
    published in Phys. Rev. Applied 11 (2019) 054090 DOI: 10.1103/PhysRevApplied.11.054090
  • Chiral Excitonic Organic Photodiodes for Direct Detection of Circular Polarized Light
    by Matthias Schulz, Frank Balzer, Dorothea Scheunemann, Oriol Arteaga, Arne Lützen, Stefan C. J. Meskers, Manuela Schiek
    published in Adv. Funct. Mater. 29 (2019) 1900684 DOI: 10.1002/adfm.201900684
  • Organic Photovoltaic Sensors for Photocapacitive Stimulation of Voltage-Gated Ion Channels in Neuroblastoma Cells
    by Oliya S. Abdullaeva, Frank Balzer, Matthias Schulz, Jürgen Parisi, Arne Lützen, Karin Dedek, Manuela Schiek
    published in Adv. Funct. Mater. 29 (2019) 1805177 DOI: 10.1002/adfm.201805177
  • 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. 9 (2018) 2413 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 17 (2017) 6455-6466 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
  • 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
  • Ultrafast Electron Emission from a Sharp Metal Nanotaper Driven by Adiabatic Nanofocusing of Surface Plasmons
    by J. Vogelsang, J. Robin, B. J. Nagy, P. Dombi, D. Rosenkranz, M. Schiek, P. Groß, C. Lienau
    published in Nano Lett. 15 (2015) 4685–4691. DOI: 10.1021/acs.nanolett.5b01513
(Stand: 10.04.2021)