A5056485744- Synthesis and properties of polymers
- Liquid Crystal Research Advancements
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Polymer crystallization and properties
- Supramolecular Self-Assembly in Materials
- biodegradable polymer synthesis and properties
- Dielectric materials and actuators
- Electrospun Nanofibers in Biomedical Applications
- Polymer Nanocomposites and Properties
- Advanced Materials and Mechanics
- Photorefractive and Nonlinear Optics
- Luminescence and Fluorescent Materials
- Advanced Polymer Synthesis and Characterization
- X-ray Diffraction in Crystallography
- Nanofabrication and Lithography Techniques
- Crystallization and Solubility Studies
- Synthesis of heterocyclic compounds
- High voltage insulation and dielectric phenomena
- Silicone and Siloxane Chemistry
- Molecular Junctions and Nanostructures
- Synthesis and Reactions of Organic Compounds
- Photochromic and Fluorescence Chemistry
University of Bayreuth
2016-2025
Bavarian Polymer Institute
2016-2025
Expro (United States)
2024
Institute of Macromolecular Chemistry
2020
Outotec (Canada)
2014
Universidade de São Paulo
2012
Technische Universität Braunschweig
2009-2012
Institute of Inorganic Chemistry of the Slovak Academy of Sciences
2012
Philipps University of Marburg
1988-2009
ETH Zurich
2001-2009
Solution processed V2O5 films prepared via a sol-gel technique are used to replace PEDOT:PSS as hole extraction interlayers in polymer:fullerene solar cells. A high work function of 5.6 eV is found for the layers without any post-processing (annealing or plasma treatment). power conversion efficiency (PCE) 3%, comparable reference devices using verified. Concomitantly, substantial improvement device stability demonstrated.
Perovskite films feature unique optoelectronic properties, rendering them promising for electronic devices. The properties depend on the morphology a broad range of length scales from nanometers to millimeters, influenced by variety factors. However, controlling is challenging. A tailored supramolecular additive, N, N'-bis(2-aminoethyl) terephthalamide developed control intermediate and perovskite crystallization methyl ammonium lead iodide (MAPbI3) enhance thermal moisture stability in...
Amorphous molecular materials that form stable glasses with high transition temperatures have many applications, including hole-transport in light-emitting devices. The synthesis of some novel derivatives 1,3,5-tris(diarylamino)benzenes, TDABs, different aryl substituents is reported. absorption, fluorescence, electrochemical behavior, and thermal properties these compounds are described their suitability as emitting devices demonstrated.
The phase behavior of the binary system consisting commercial nucleating and clarifying agent 1,3:2,4-bis(3,4-dimethyldibenzylidene)sorbitol (DMDBS, Millad 3988) isotactic polypropylene (i-PP) was investigated over entire concentration range by means differential scanning calorimetry (DSC), rheology, optical microscopy. Experimental diagrams were constructed from data obtained in melting crystallization studies, a simple monotectic is advanced. Distinct regimes diagram, which apparently...
Only about 200 μg of catalyst are required to identify the catalytically active materials on a combinatorial library heterogeneous catalysts by IR thermography. The procedure is highly sensitive, and temperature differences arising from catalytic activity hydrogenations oxidations have been reliably detected down 0.1 K.
Only about 200 μg of catalyst are required to identify the catalytically active materials on a combinatorial library heterogeneous catalysts by IR thermography. The procedure is highly sensitive, and temperature differences arising from catalytic activity hydrogenations oxidations have been reliably detected down 0.1 K.
We report the discovery of a family organic compounds, substituted 1,3,5-benzenetrisamides, thatdepending on subtle details their chemical structureare capable selectively and extremely efficiently nucleating growth common α-crystal modification major industrial polymer isotactic polypropylene (i-PP), rendering this normally turbid material highly transparent ("clarified") at exceedingly low concentrations (as as weight fraction 0.0002), inducing mechanically distinct, tough i-PP...
We reported on highly efficient semitransparent polymer solar cells comprising a transparent sputtered indium tin oxide (ITO) top electrode. used an inverted cell structure with titanium dioxide prepared by atomic layer deposition as electron selective and molybdenum (MoO3) hole extraction layer. Moreover, the MoO3 prevents damage to organic active materials due ITO sputtering process. For device, power conversion efficiencies of 1.9% were achieved high transmittance 80% in red region...
Abstract The synthesis and phase behaviour of azo dye containing liquid crystalline side group copolymers are described. These Copolymers show the same electro‐optical effects as low molar mass guest‐host systems. Their macroscopic oriented nematic structure can be frozen in below glass transition temperature resulting a polymer film with dichroic properties. (phase behaviour, surface electric field orientation) improved via mixtures crystals.
To increase efficiency of bulk heterojunctions for photovoltaic devices, the functional morphology active layers has to be understood, requiring visualization and discrimination materials with very similar characteristics. Here we combine high-resolution spectroscopic imaging using an analytical transmission electron microscope nonlinear multivariate statistical analysis classification multispectral image data. We obtain a visual representation showing homogeneous phases donor acceptor,...
Functional supramolecular systems like carbonyl-bridged triarylamine (CBT) trisamides are known for their long-range energy transport at room temperature. Understanding the complex self-assembly processes of this system allows control over generated structures using controlled polymerization. Here, we present two novel CBT with (S)- or (R)-chiral side chains which show a two-pathway behavior in solution. Depending on thermal profile during process, different stable states obtained under...
Titanium dioxide solar cells on top of a wide range substrates, even flexible plastics, are accessible by chemical vapor deposition (CVD) TiO2 resistive heating Ti3O5 under partial oxygen pressure. Cells using in combination with Cu phthalocyanine ITO substrates (see Figure) most effective if the layer is thin (15 nm), and further perylene dye used to tune wavelength light absorption.
In a 8-μL multichambered microreactor (the photo shows the components) material libraries can be produced in simple manner through combinatorial hydrothermal synthesis. model experiment synthesis of zeolite TS-1 has been varied combinatorially. The resulting library is characterized directly by automated microdiffraction.
Abstract
1,3:2,4-Di-O-benzylidene-D-sorbitol (DBS) and its derivatives are efficient gelators to solidify organic solvents over a wide range of polarity. In this paper we demonstrate the usefulness certain DBS as form thermoreversible gels in electrolyte solutions which particular interest for solar cell applications. The adjustable, high sol–gel phase transition temperature 1,3:2,4-di-O-dimethylbenzylidene-D-sorbitol (DMDBS) with 3-methoxypropionitrile-based made gelator very attractive dye...
A storage material that is suitable for rewritable volume holographic media with a thickness in the millimeter range presented (see figure). Writing, reading, and deleting are possible by purely optical means, inscribed multiplexed gratings exhibit good long-term stability. two-step method of allows more than 1000 erase–rewrite cycles without measurable change material.
Lipid-mediated delivery of DNA into cells holds great promise both for gene therapy and basic research applications. This paper describes the efficient facile synthesis characterization a new multivalent cationic lipid with double-branched headgroup structure The synthetic scheme can be extended to give lipids different charge, spacer, or chain length. chemical physical properties self-assembled complexes liposomes (CLs) indications why possess superior transfection properties. bears five...