A5103223484- Organic Electronics and Photovoltaics
- Quantum Dots Synthesis And Properties
- Molecular Junctions and Nanostructures
- Microplastics and Plastic Pollution
- Photochromic and Fluorescence Chemistry
- Perovskite Materials and Applications
- Conducting polymers and applications
- Nanocluster Synthesis and Applications
- Semiconductor materials and devices
- Recycling and Waste Management Techniques
- Surfactants and Colloidal Systems
- Organic Light-Emitting Diodes Research
- Photoreceptor and optogenetics research
- Synthesis and Properties of Aromatic Compounds
- Gold and Silver Nanoparticles Synthesis and Applications
- Extraction and Separation Processes
- Nanoparticles: synthesis and applications
- Advanced Memory and Neural Computing
- Innovative Microfluidic and Catalytic Techniques Innovation
- Microfluidic and Capillary Electrophoresis Applications
Federal Institute For Materials Research and Testing
2022-2024
University of Potsdam
2023
Fraunhofer Institute for Microengineering and Microsystems
2022
Humboldt-Universität zu Berlin
2014-2020
Zinc oxide (ZnO) is regarded as a promising alternative material for transparent conductive electrodes in optoelectronic devices. However, ZnO suffers from poor chemical stability. also has moderate work function (WF), which results substantial charge injection barriers into common (organic) semiconductors that constitute the active layer device. Controlling and tuning WF therefore necessary but challenging. Here, variety of phosphonic acid based self‐assembled monolayers (SAMs) deposited on...
Microplastics and nanoplastics pollute the natural environment all over world, but full extent of hazards posed by this waste is unclear. While research on microplastics well advanced, little work has been done nanoplastics. This discrepancy mainly due to lacking ability detect in biologically environmentally relevant matrices. Nanoplastics reference materials can help development suitable methods for identifying quantifying nature. The aim synthesize made from one most commonly used...
An approach is presented to modify the WF of solution-processed sol-gel derived ZnOover an exceptionally wide range more than 2.3 eV. This relies on formation dense and homogeneous self-assembled monolayers based phosphonic acids with different dipole moments. allows us apply ZnO as charge selective bottom electrodes in either regular or inverted solar cell structures, using P3HT:PCBM active layer. These devices compete even exceed performance reference ITO/PEDOT:PSS. Our finding challenges...
Abstract The functionality of interfaces in hybrid inorganic/organic (opto)electronic devices is determined by the alignment respective frontier energy levels at both sides heterojunctions. Controlling interface electronic landscape a key element for achieving favourable level and charge transfer processes. Here, it shown that properties polar ZnO surfaces can be reversibly modified using organic photochromic switches. By employing range surface characterization techniques combined with...
This study provides science-based evidence on endocrine disrupting effects of polyethylene, polystyrene and polypropylene nanoparticles their mixtures indicating the importance hazard assessment aggregate exposure to nanoplastics.
A versatile synthesis of nonsymmetrical, terminally substituted p-sexiphenyl (6P) derivatives has been developed. The makes use a nonsymmetrical starting material as well modular functionalization using Suzuki cross-coupling to yield soluble precursor, which finally is converted the insoluble target 6P derivatives. These display similar electronic and optical properties parent 6P, yet permanent dipole along their molecular axis allows for tuning self-assembly on various substrate surfaces.
The combined effect of ultraviolet (UV) light soaking and self‐assembled monolayer deposition on the work function (WF) thin ZnO layers efficiency hole injection into prototypical conjugated polymer poly(3‐hexylthiophen‐2,5‐diyl) (P3HT) is systematically investigated. It shown that WF depend strongly history UV exposure. Proper treatment layer enables ohmic P3HT, demonstrating as a potential anode material for organic optoelectronic devices. results also suggest valid conclusions...
Abstract We report on gold clusters with around 62 atoms and a diameter of 1.15±0.10 nm. Dispersions the are long‐term stable for two years at ambient conditions. The synthesis was performed by mixing tetrachloroauric acid (HAuCl 4 ⋅ 3 H 2 O) ionic liquid 1‐ethyl‐3‐methylimidazolium dicyanamide ([Emim][DCA]) temperatures 20 to 80 °C. Characterization small‐angle X‐ray scattering (SAXS), UV‐Vis spectroscopy, MALDI‐TOF mass spectrometry. A three‐stage model is proposed formation clusters, in...
The separation of colloidal nanocrystals from their original synthesis medium is an essential process step towards application, however, the costs on a preparative scale are still constraint. A new combination approaches for purification hydrophobic Quantum Dots presented, resulting in efficient scalable regard to time and solvent consumption, using common laboratory equipment low-cost materials. procedure based solvent-induced adhesion solid phase extraction. platform allows transition...
Artificial intelligence takes inspiration from the functionalities and structure of brain to solve complex tasks allow learning. Yet, hardware realization that simulates synaptic activities realized with electrical devices still lags behind computer software implementation, which has improved significantly during past decade. Herein, capability emulate by exploiting surface plasmon polaritons (SPPs) is shown. By depositing photochromic switching molecules (diarylethene) on a thin film gold,...
The energy level alignment at organic/inorganic (o/i) semiconductor interfaces is crucial for any light-emitting or -harvesting functionality. Essential the access to both occupied and unoccupied electronic states directly interface, which often deeply buried underneath thick organic films challenging characterize. We use several complementary experimental techniques determine structure of p -quinquephenyl pyridine (5P-Py) adsorbed on ZnO(1 0 -1 0). parent anchoring group, pyridine,...
Abstract The self‐assembly of electroactive organic molecules on transparent conductive oxides is a versatile strategy to engineer the interfacial energy‐level alignment and enhance charge carrier injection in optoelectronic devices. Via chemical grafting an aromatic oligothiophene molecule by changing position phosphonic acid anchoring group with respect moiety (terminal internal), direction main molecular dipole changed, i.e., from parallel perpendicular substrate, study arrangement...