A5067483324- Organic Electronics and Photovoltaics
- Organic and Molecular Conductors Research
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Molecular Junctions and Nanostructures
- Magnetism in coordination complexes
- Conducting polymers and applications
- Perovskite Materials and Applications
- Crystallography and molecular interactions
- Analytical Chemistry and Sensors
- Advanced Memory and Neural Computing
- Thin-Film Transistor Technologies
- Semiconductor materials and devices
- Organic Light-Emitting Diodes Research
- Electrochemical Analysis and Applications
- Luminescence and Fluorescent Materials
- Porphyrin and Phthalocyanine Chemistry
- Quantum and electron transport phenomena
- Force Microscopy Techniques and Applications
- Graphene research and applications
- Solid-state spectroscopy and crystallography
- Advanced Sensor and Energy Harvesting Materials
- Electrochemical sensors and biosensors
- Fullerene Chemistry and Applications
- Advanced biosensing and bioanalysis techniques
Institut de Ciència de Materials de Barcelona
2016-2025
Instituto de Ciencia de Materiales de Sevilla
2021-2025
Universitat Autònoma de Barcelona
2007-2024
Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine
2015-2024
Centre for Research on Ecology and Forestry Applications
2020-2021
Delft University of Technology
2004-2018
Bioengineering Center
2014-2018
FC Barcelona
2016-2018
University of Bern
2014
Consejo Superior de Investigaciones Científicas
1995-2011
Single-crystal field effect transistors of the organic semiconductor dithiophene-tetrathiafulvalene (DT-TTF) were prepared by drop casting. Long, thin crystals connected two microfabricated gold electrodes, and a silicon substrate was used as back gate. The highest hole mobility observed 1.4 cm2/Vs, which is reported for an not based on pentacene. A high ON/OFF ratio at least 7 × 105 obtained this device.
Recently, it was reported that crystals of the organic material dithiophene-tetrathiafulvalene (DT-TTF) have a high field-effect charge carrier mobility 1.4 cm2/(V·s). These were formed by simple drop-casting method, making this interesting to investigate for possible applications in low-cost electronics. Here, single-crystal transistors based on materials related DT-TTF are presented and clear correlation between crystal structure electrical characteristics is observed. The observed...
The novel and exciting field of molecular spintronics has recently attracted a great deal interest promising results have already been reported. utilisation organic radicals that could favour spin polarisation conservation during transport offers new possibilities; however, first fundamental investigation these materials, especially those deposited on surfaces, is required. Here we highlight our recent regarding the functionalisation surfaces with polychlorotriphenylmethyl (PTM) following...
Organic radicals are neutral, purely organic molecules exhibiting an intrinsic magnetic moment due to the presence of unpaired electron in molecule its ground state. This property, added low spin–orbit coupling and weak hyperfine interactions, make neutral good candidates for molecular spintronics insofar as radical character is stable solid state electronic devices. Here we show that paramagnetism polychlorotriphenylmethyl form a Kondo anomaly preserved two- three-terminal solid-state...
Abstract The development of low‐cost printed organic electronics entails the processing active semiconductors (OSCs) through solution‐based techniques. However, preparation large‐area uniform and reproducible films based on OSC inks can be very challenging due to low viscosity their solutions, which causes dewetting problems, stability polymer or difficulty in achieving appropriate crystal order. To circumvent this, a promising route is use blends OSCs insulating binding polymers. This...
In electronics, the field‐effect transistor (FET) is a crucial cornerstone and successful integration of this semiconductor device into circuit applications requires stable ideal electrical characteristics over wide range temperatures environments. Solution processing, using printing or coating techniques, has been explored to manufacture organic transistors (OFET) on flexible carriers, enabling radically novel electronics applications. Ideal characteristics, in materials, are typically only...
During the last decades, small molecule organic semiconductors have been successfully used as active layer in field‐effect transistors (OFETs). Despite high mobility achieved so far with molecules, order to progress field it is crucial find techniques process them from solution. The device reproducibility one of principal weak points electronics for further commercialization. To achieve a device‐to‐device essential control morphology and polymorphism OFET application. In this work,...
Abstract Organic semiconductor materials exhibit a great potential for the realization of large-area solution-processed devices able to directly detect high-energy radiation. However, only few works investigated on mechanism ionizing radiation detection in this class materials, so far. In work we investigate physical processes behind X-ray photoconversion employing bis-(triisopropylsilylethynyl)-pentacene thin-films deposited by bar-assisted meniscus shearing. The thin film coating speed and...
General-purpose quantum computation and simulation require multi-qubit architectures with precisely defined, robust interqubit interactions, coupled local addressability. This is an unsolved challenge, primarily due to scalability issues. These issues often derive from poor control over interactions. Molecular systems are promising materials for the realization of large-scale architectures, their high degree positionability possibility tailor The simplest architecture two-qubit system, which...
We report on a computational study to understand the high mobility found in dithiophene-tetrathiafulvalene (DT-TTF) transistors, with respect that known for pentacene, using an extended measure of reorganization energy (lambdareorg). demonstrate importance considering intermolecular interactions assess hole-hopping mobilities. find due steric, polarizable environment and structural changes induced by local charge delocalization, calculated lambdareorg DT-TTF decreases from 0.574 eV isolated...
Great interest in organic field-effect transistors (OFETs) has emerged the last years due to their potential applications. Here we highlight very recent use of tetrathiafulvalene derivatives for fabricating OFETs either from vacuum deposition or solution. These materials are extremely promising owing facile processability and high device performance.
We report on the fabrication and characterization of field-effect transistors based single crystals organic semiconductor dibenzo-tetrathiafulvalene (DB-TTF). demonstrate that it is possible to prepare very-good-quality DB-TTF from solution. These devices show high mobilities typically in range 0.1–1cm2∕Vs. The temperature dependence was also studied revealing an initial increase mobility when lowering until reached a maximum, after which decreased following thermally activated behavior with...
Solution prepared single crystal organic field-effect transistors (OFETs) combine low-cost with high performance due to structural ordering of molecules. However, in crystals polymorphism is a known phenomenon, which can have crucial influence on charge transport. Here, the solution-prepared OFETs based two different polymorphs dithiophene-tetrathiafulvalene, were investigated by confocal Raman spectroscopy and X-ray diffraction, are reported. OFET devices using configurations show that both...
In the last few years exciting advances have been achieved in developing printing techniques for organic semiconductors, and impressive mobility values reported resulting field‐effect transistors (OFETs). However, not all these are scalable some of them require additional crystallization steps. This study reports on fabrication OFETs employing blends four benchmark semiconductors with polystyrene demonstrates that applying same formulation experimental conditions them, highly reproducible...
Disentangling the details of vertical distribution small semiconductor molecules blended with polystyrene (PS) and contact properties are issues fundamental value for designing strategies to optimize small-molecule:polymer blend organic transistors. These questions addressed here ultrathin blends 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) PS processed by a solution-shearing technique using three different composition ratios. We show that friction force microscopy (FFM)...
Abstract Since the first demonstration, electrolyte-gated organic field-effect transistors (EGOFETs) have immediately gained much attention for development of cutting-edge technology and they are expected to a strong impact in field (bio-)sensors. However EGOFETs directly expose their active material towards aqueous media, hence limited library semiconductors is actually suitable. By using two mostly unexplored strategies such as blended materials together with printing technique, we...
Abstract Simple synthetic routes, high active layer thickness tolerance as well stable organic solar cells are relentlessly pursued key enabling traits for the upscaling of photovoltaics. Here, potential to address these issues by tuning donor polymer molecular weight is investigated. Specifically, focus on PTQ10, a with low complexity, number average weights 2.4, 6.2, 16.8, 52.9, and 54.4 kDa, in combination three different non‐fullerene acceptors, namely Y6, Y12, IDIC. Molecular weight,...
A self-assembled monolayer of a tetrathiafulvalene derivative on indium tin oxide is shown to operate as ternary redox switch in which the magnetic and optical outputs are employed provide readout state. This surface-confined molecular exhibits excellent reversibility stability thus promising for development electronics.
In polymeric composite thin films it is possible to translate elastic elongations of the film into reversible nanoscale deformations soft organic-crystal components, leading with extreme sensitivity strain changes durable, fast, and completely responses. Simple prototypes (see image), demonstrate that these sensors are highly promising for a wide range applications.