A5064274955- Organic Electronics and Photovoltaics
- Molecular Junctions and Nanostructures
- Conducting polymers and applications
- Quantum and electron transport phenomena
- Organic Light-Emitting Diodes Research
- Advanced Memory and Neural Computing
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Strong Light-Matter Interactions
- Plasmonic and Surface Plasmon Research
- Magnetism in coordination complexes
- Thermal Radiation and Cooling Technologies
- Semiconductor materials and interfaces
- Magnetic properties of thin films
- Semiconductor materials and devices
- Synthesis and Properties of Aromatic Compounds
- Magnetic and transport properties of perovskites and related materials
- Integrated Circuits and Semiconductor Failure Analysis
- Supramolecular Chemistry and Complexes
- Mechanical and Optical Resonators
- Synthesis and Biological Evaluation
- Graphene research and applications
- Crystallography and molecular interactions
- Luminescence and Fluorescent Materials
- Advanced Sensor and Energy Harvesting Materials
CIC nanoGUNE
2014-2020
Ayuntamiento de San Sebastián
2015-2019
Enhanced light-matter interactions are the basis of surface enhanced infrared absorption (SEIRA) spectroscopy, and conventionally rely on plasmonic materials their capability to focus light nanoscale spot sizes. Phonon polariton nanoresonators made polar crystals could represent an interesting alternative, since they exhibit large quality factors, which go far beyond those counterparts. The recent emergence van der Waals enables fabrication high-quality nanophotonic resonators based phonon...
A spin-valve solar cell Electronic spin currents can be measured with a valve—a device that injects charge carriers from one ferromagnetic electrode to another through semiconductor layer. Some organic semiconductors have long spin-carrier lifetimes and also generate the photovoltaic effect. Sun et al. fabricated valve based on C 60 showed current could modulated by photocurrent. At certain light intensities, sign of photocurrent changed using an applied magnetic field, effect potentially...
Long distance spin transport and photoresponse are demonstrated in a single F16CuPc valve. By introducing low-temperature strategy for controlling the morphology of organic layer during fabrication molecular valve, large spin-diffusion length up to 180 nm is achieved at room temperature. Magnetoresistive photoresponsive signals simultaneously observed even an air atmosphere.
Energy barriers between the metal Fermi energy and molecular levels of organic semiconductor devoted to charge transport play a fundamental role in performance electronic devices. Typically, techniques such as electron photoemission spectroscopy, Kelvin probe measurements, in‐device hot‐electron spectroscopy have been applied study these interfacial barriers. However, so far there has not any direct method available for determination at interfaces with n‐type polymeric semiconductors. This...
Abstract Phonon‐polaritons, mixed excitations of light coupled to lattice vibrations (phonons), are emerging as a powerful platform for nanophotonic applications. This is because their ability concentrate into extreme sub‐wavelength scales and longer phonon lifetimes compared plasmonic counterparts. In this work, the infrared properties phonon‐polaritonic nanoresonators made monoisotopic 10 B hexagonal boron nitride (h‐BN) explored, material with increased phonon‐polariton naturally abundant...
Abstract Molecules are proposed to be an efficient medium host spin‐polarized carriers, due their weak spin relaxation mechanisms. While relatively long lifetimes measured in molecular devices, the most promising route toward device functionalization is use chemical versatility of molecules achieve a deterministic control and manipulation electron spin. Here, by combining magnetotransport experiments with element‐specific X‐ray absorption spectroscopy, this study shows ability modify...
Abstract Molecular spins have become key enablers for exploring magnetic interactions, quantum information processes and many-body effects in metals. Metal-organic molecules, particular, let the spin state of core metal ion to be modified according its organic environment, allowing localized moments emerge as functional entities with radically different properties from simple atomic counterparts. Here, using preserving integrity transition phthalocyanine high-spin complexes, we demonstrate...
High-performance lateral and vertical organic field-effect transistors are demonstrated based on graphene electrodes solution-processed N2200 polymers for advanced organic-electronics.
Abstract Marcus’s theory of electron transfer, initially formulated six decades ago for redox reactions in solution, is now great importance very diverse scientific communities. The molecular scale tunability electronic properties renders organic semiconductor materials principle an ideal platform to test this theory. However, the demonstration charge transfer different Marcus regions requires a precise control over driving force acting on carriers. Here, we make use three-terminal...
An approach for the synthesis of pyrene-fused acenes that allows introduction electron-withdrawing cyano groups in key positions simultaneously (i) induce twists aromatic framework and (ii) stabilize LUMO level is reported. This combination steric electronic features provide a twisted, stable, n-type tetrabenzoheptacene as confirmed by theoretical calculations optical, electrochemical, thermal, electrical characterization.
A pyrene-fused phenazinothiadiazole that shows electron mobilities (<italic>μ</italic><sub>e</sub>= 0.016 cm<sup>2</sup>V<sup>−1</sup>s<sup>−1</sup>) two orders of magnitude higher than those reported for pyrazaacenes is described.
The synthesis and properties of two highly stable K-conjugated dibenzoazahexacenes are reported. Single-crystal X-ray, optoelectronic, electrochemical characterization combined with theoretical studies show a favorable molecular packing an optimal energy alignment their frontier orbitals for charge transport. Electrical illustrates that the preferential transport holes or electrons depends on number N atoms in aromatic framework.
The synthesis and characterisation of pyrene-fused tetraazaheptacene that is constituted two terminal pyrene units a central tetraazaanthracene core are reported.
Abstract A model is developed to describe the electron transport properties of hot devices based on organic semiconductors. For first time, simulations cover all different processes carriers experience in device, which allows disentangling various effects characteristics. The compared experimental measurements and excellent agreement found. In addition, includes spin thus able a transistor. this spatial variation diffusion length found, scales inversely proportional density. current can be...
Flexible and wearable devices are among the upcoming trends in opto-electronics market. Nevertheless, bendable should ensure same efficiency stability as their rigid analogs. It is well-known that energy barriers between metal Fermi molecular levels of organic semiconductors devoted to charge transport key parameters performance organic-based electronic devices. Therefore, it paramount understand how at metal/organic semiconductor interfaces change with bending. In this work, we...
The relevance for modern computation of non-volatile high-frequency memories makes ac-transport measurements magnetic tunnel junctions (MTJs) crucial exploring this regime. Here, we demonstrate a frequency-mediated effect in which the magnetoimpedance reverses its sign classical Co/Al2O3/NiFe MTJ, whereas only observe gradual decrease magnetophase. Such effects are explained by capacitive coupling parallel resistor and capacitor equivalent circuit model MTJ. Furthermore, report positive...
The quantification of the electronic transport energy gap a molecular semiconductor is essential for pursuing any challenge in optoelectronics.
We show the operation of a Cu/Al2O3/Cu/n-Si hot-electron transistor for straightforward determination metal/semiconductor energy barrier height even at temperatures below carrier-freeze out in semiconductor. The spectroscopy measurements return fairly temperature independent value Cu/n-Si 0.66 ± 0.04 eV 180 K, substantial accordance with mainstream methods based on complex fittings either current-voltage (I-V) and capacitance-voltage (C-V) measurements. transistors exhibit an OFF current ∼2...
One of the key requirements for efficient organic-electronic devices is creation a negligible energy barrier carrier injection at metal-organic interface. Here, graphene-organic interface with an almost demonstrated in high-performance hybrid heterojunction device. The gate-tunable current-voltage characteristics show that electronic transport can be tuned from interface-limited to bulk-dominated regime by lowering barrier. N-type transistors PTCDI-C8 organic thin film as active layer...