A5025126911- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Advanced Sensor and Energy Harvesting Materials
- Perovskite Materials and Applications
- Organic Light-Emitting Diodes Research
- Supercapacitor Materials and Fabrication
- Crystallization and Solubility Studies
- Advanced Thermoelectric Materials and Devices
- X-ray Diffraction in Crystallography
- Chalcogenide Semiconductor Thin Films
- Advanced Memory and Neural Computing
- Graphene research and applications
- Molecular Junctions and Nanostructures
- 2D Materials and Applications
- Electron Spin Resonance Studies
- Quantum Dots Synthesis And Properties
- Fuel Cells and Related Materials
- Polymer Nanocomposite Synthesis and Irradiation
- Synthesis and properties of polymers
- Industrial Vision Systems and Defect Detection
- Advanced NMR Techniques and Applications
- Thin-Film Transistor Technologies
- Advanced battery technologies research
- Additive Manufacturing and 3D Printing Technologies
- MXene and MAX Phase Materials
Imperial College London
2015-2023
University of Chemistry and Technology, Prague
2020-2023
Conventional semiconducting polymer synthesis typically involves transition metal-mediated coupling reactions that link aromatic units with single bonds along the backbone. Rotation around these contributes to conformational and energetic disorder therefore potentially limits charge delocalisation, whereas use of metals presents difficulties for sustainability application in biological environments. Here we show a simple aldol condensation reaction can prepare polymers where double lock-in...
Transient absorption spectroscopy is used to study the charge transfer processes in methyl ammonium lead triiodide based photoactive layers under ambient and inert conditions.
Three n-type fused lactam semiconducting polymers were synthesized for thermoelectric and transistor applications via a cheap, highly atom-efficient, nontoxic transition-metal free aldol polycondensation. Energy level analysis of the three demonstrated that reducing central acene core size from two anthracenes (A-A), to mixed naphthalene–anthracene (A-N), naphthalene cores (N-N) resulted in progressively larger electron affinities, thereby suggesting an increasingly more favorable efficient...
Abstract Conducting polymers are of interest for a broad range applications from bioelectronics to thermoelectrics. The factors that govern their complex charge transport physics include the structural disorder present in these highly doped polymer films and Coulombic interactions between electronic carriers dopant counterions. Previous studies have shown at low doping levels strongly trapped vicinity counterions, while high is not limited by trapping, which manifests itself conductivity...
Abstract The exploration of a wide range molecular structures has led to the development high‐performance conjugated polymer semiconductors for flexible electronic applications including displays, sensors, and logic circuits. Nevertheless, many field‐effect transistors (OFETs) exhibit nonideal device characteristics instabilities rendering them unfit industrial applications. These often do not originate in material's intrinsic structure, but rather external trap states caused by chemical...
Abstract Precise control of the microstructure in organic semiconductors (OSCs) is essential for developing high‐performance electronic devices. Here, a comprehensive charge transport characterization two recently reported rigid‐rod conjugated polymers that do not contain single bonds main chain reported. It demonstrated molecular design polymer makes it possible to achieve an extended linear backbone structure, which can be directly visualized by high‐resolution scanning tunneling...
Abstract The rise of 3D printing technology, with fused deposition modeling as one the simplest and most widely used techniques, has empowered an increasing interest for composite filaments, providing additional functionality to 3D‐printed components. For future applications, like electrochemical energy storage, conversion, sensing, tuning properties filament its characterization is eminent importance improve performance devices. In this work, customized conductive graphite/poly(lactic acid)...
The charge transport–limiting factors in conjugated polymers without single-bond linkages the backbone have been identified.
Abstract The measurement of the mechanical properties conjugated polymers can reveal highly relevant information linking optoelectronic to underlying microstructures and knowledge glass transition temperature ( T g ) is paramount for informing choice processing conditions interpreting thermal stability devices. In this work, we use dynamical analysis determine a range state‐of‐the‐art with different degrees crystallinity that are widely studied applications in organic field‐effect...
Three thiophene ring-terminated benzothieno[3,2-b]benzothiophene (BTBT) derivatives, C-C6-DBTTT, C-C12-DBTTT, and L-C12-DBTTT, were designed synthesized, differing in the isomerization of alkyl chain position as well aromatic core construction. A study crystal structure electronic properties combined with a theoretical investigation was performed to understand structure–property relationships for application these molecules organic field-effect transistors (OFETs). Different packing...
The crystallization and aggregation behaviors of semiconducting polymers play a critical role in determining the ultimate performance optoelectronic devices based on these materials. Due to soft nature polymers, crystallite imperfection exists ubiquitously. To this aspect, crystallinity is often used represent degree reciprocal relation. Despite importance, discussion still phenomenological level ambiguous many cases. As two major contributors imperfection, size paracrystallinity are highly...
For industrial-scale electrochemical applications of renewable energy routes such as water splitting or supercapacitors, there is a huge need for flexible, durable, and large-area electrodes. In this study, flexible conductive poly(lactic acid)/graphite composite films, with high mass percentage (∼64%) graphitic material, are prepared without specialized equipment can be used stable electrodes in aqueous solutions. These films substrate the hydrogen evolution reaction, which demonstrated...
Despite the intense amount of attention and huge potential 2D-layered pnictogens for applications in chemistry, physics, materials science, there has yet to be a robust strategy developed systematically functionalize them tailor their properties. This is due number factors, including practical instability toward ambient conditions, difficulty characterizing modified materials, also more inherent reactivity issues. Here, avenues functionalization are discussed using examples molecular models...
ABSTRACT Two donor–acceptor conjugated polymers with azaisoindigo as acceptor units and bithiophene terthiophene donor have been synthesized by Stille polymerization. These two successfully applied in field‐effect transistors polymer solar cells. By changing the component of backbone from to terthiophene, density thiophene is increased, manifesting a decrease both ionization potential electron affinity. Therefore, charge transport switches ambipolar predominantly hole behavior. PAIIDTT...
The influence of heteroatom domains on the volatile organic compound (VOC) detection properties B/N co-doped graphene oxide nanostructures is investigated by using different boron (B) and nitrogen (N) sources.
Abstract Heavy heteroatom substitution of the backbone is an effective strategy to improve molecular packing and charge delocalization in polymer semiconductors. Such a modification also facilitates oxidative doping as result reduced ionization potential (IP). Here, effect single‐atom selenium on transport properties class polythiophene copolymers explored. The room temperature (RT) conductivities doped polymers are significantly enhanced by for both ion exchange doping. conduction...