A5055404667- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
- Photonic Crystals and Applications
- Quantum Dots Synthesis And Properties
- Gas Sensing Nanomaterials and Sensors
- Photonic and Optical Devices
- Conducting polymers and applications
- Plasmonic and Surface Plasmon Research
- Covalent Organic Framework Applications
- TiO2 Photocatalysis and Solar Cells
- Chalcogenide Semiconductor Thin Films
- Organic Light-Emitting Diodes Research
- Nonlinear Optical Materials Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Crystallization and Solubility Studies
- 2D Materials and Applications
- X-ray Diffraction in Crystallography
- Analytical Chemistry and Sensors
- Advanced Memory and Neural Computing
- Advancements in Battery Materials
- Random lasers and scattering media
- Inorganic Chemistry and Materials
- Semiconductor Lasers and Optical Devices
- Optical Coatings and Gratings
- Electronic and Structural Properties of Oxides
University of Córdoba
2010-2025
Max Planck Institute for Solid State Research
2018-2024
Ludwig-Maximilians-Universität München
2021
Excellence Cluster Universe
2021
Korea University
2021
Consejo Superior de Investigaciones Científicas
2012-2019
Instituto de Ciencia de Materiales de Sevilla
2012-2019
Universidad de Sevilla
2012-2019
Stuttgart Observatory
2019
IVI Sevilla Clinic
2016-2019
As covalent organic frameworks (COFs) are coming of age, the lack effective approaches to achieve crystalline and centimeter-scale-homogeneous COF films remains a significant bottleneck toward advancing application COFs in optoelectronic devices. Here, we present synthesis colloidal nanoplates, with lateral sizes ∼200 nm average heights 35 nm, their utilization as photocathodes for solar hydrogen evolution. The resulting nanoplate colloid exhibits unimodal particle-size distribution an...
Abstract Carbon nitrides constitute a class of earth‐abundant polymeric semiconductors, which have high potential for tunability on molecular level, despite their chemical and thermal inertness. Here the first postsynthetic modification 2D carbon nitride poly(heptazine imide) (PHI) is reported, decorated with terminal melamine (Mel) moieties by functional group interconversion. The covalent attachment this verified based suite spectroscopic microscopic techniques supported quantum–chemical...
Abstract The carbon nitride poly(heptazine imide), PHI, has recently emerged as a powerful 2D photocatalyst with intriguing charge storing ability. Yet, insights into how morphology, particle size, and defects influence its photophysical properties are virtually absent. Here, ultrasonication is used to systematically tune the size well concentration of surface functional groups study their impact. Enhanced photocatalytic activity correlates an optimal amount those that create shallow trap...
Carbon nitrides are among the most studied materials for photocatalysis; however, limitations arise from inefficient charge separation and transport within material. Here, this aspect is addressed in 2D carbon nitride poly(heptazine imide) (PHI) by investigating influence of various counterions, such as M = Li+ , Na+ K+ Cs+ Ba2+ NH4+ tetramethyl ammonium, on material's conductivity photocatalytic activity. These ions PHI pores affect stacking layers, which further influences predominantly...
Significance Light-driven microswimmers offer prospects for autonomous microsystems. Understanding their surface catalytic processes responsible propulsion is essential in tailoring them specific applications. So far, photocatalytic have been limited by the requirement of continuous illumination. Here, we report light-driven 2D carbon nitride-based Janus microswimmers, which show efficient aqueous media not only during but also after illumination about 30 min s prior illumination, due to...
Solar batteries capable of harvesting sunlight and storing solar energy present an attractive vista to transition our infrastructure into a sustainable future. Here we integrated, fully earth-abundant battery based on bifunctional (light absorbing charge storing) carbon nitride (K-PHI) photoanode, combined with organic hole transfer storage materials. An internal ladder-type cascade via transport layer is used selectively shuttle the photogenerated holes PEDOT:PSS cathode. This concept...
Perovskite-based tandem solar cells are of increasing interest as they approach commercialization. Here we use experimental parameters from optical spectroscopy measurements to calculate the limiting efficiency perovskite–silicon and all-perovskite two-terminal tandems, employing currently available bandgap materials, 42.0% 40.8%, respectively. We show luminescence coupling between subcells (the transfer photons high-bandgap low-bandgap subcell) relaxes current matching when subcell is a...
Abstract In the field of artificial photosynthesis with semiconductor light harvesters, default cocatalyst morphologies are isotropic, 0D nanoparticles. Herein, use highly anisotropic 2D ruthenium oxide nanosheet (RONS) cocatalysts as an approach to enhance photocatalytic oxygen evolution (OER) rates on commercial WO 3 nanoparticles (0D harvester) is presented. At optimal loadings and identical photocatalysis conditions, impregnated RONS (RONS/WO ) shows a fivefold increase in normalized...
Atomistic molecular dynamics calculations of self-assembled monolayers alkanethiol molecules on gold nanoparticles are carried out to determine the surface per ligand molecule as a function size. The footprint is determined by calculating tension starting from its thermodynamic definition in canonical ensemble. We use method Chiu et al. (Chiu, C. J. Chem. Phys. 2010, 132, 054706) that makes parametric dependence system size potential energy between and molecules. role different groups...
Inorganic zero-dimensional perovskites, such as Cs4PbBr6, offer an underexplored opportunity to achieve efficient exciton formation and radiative recombination. In particular, the origin of sub-bandgap green emission from Cs4PbBr6 is not well understood. Herein, we develop a sequential deposition approach growing highly smooth films with low rms roughness 8.15 nm by thermal evaporation. We find that have excitonic absorption edge at 3.9 eV, but exhibit photoluminescence 2.4 quantum yield...
Lithium-ion conducting argyrodites are among the most studied solid electrolytes due to their high ionic conductivities. A major concern in a solid-state battery is stability of electrolyte. Here, we present systematic study on influence cationic and anionic substitution electrochemical Li6PS5X using stepwise cyclic voltammetry, optical band gap measurements, hard X-ray photoelectron spectroscopy along with first-principles calculations. We observe that going from Li6PS5Cl Li6+xP1–xMxS5I (M...
Thermal co-evaporation of halide perovskites is a solution-free, conformal, scalable, and controllable deposition technique with great potential for commercial applications, particularly in multi-junction solar cells.
Quantitative comparison of photocatalytic performances across different photocatalysis setups is technically challenging. Here, we combine the concepts relative and optimal photonic efficiencies to normalize activities with an internal benchmark material, RuO2 photodeposited on a P25-TiO2 photocatalyst, which was optimized for reproducibility oxygen evolution reaction (OER). Additionally, general set good practices identified ensure reliable quantification OER, including photoreactor design,...
Abstract Among the different approaches to humidity sensing available, those based on fluorescent signals are gathering a great deal of attention due their fast response and versatility detection design. So far, all proposals have focused use luminescent probes whose emission is either triggered or inhibited by presence water that reacts alters chemical environment, hence inducing signal change. Here, novel concept in combining stimuli‐responsive photonic resonators with molecular...
Herein we realize an optical design that optimizes the performance of bifacial solar cells by incorporating spherical TiO<sub>2</sub> nanoparticles controlled size and load integrated in working electrodes dye-sensitized without modifying any usually employed components.
Directed design of new photocatalysts remains a challenging task in materials chemistry. One approach metal oxides is to engineer the bulk electronic structure achieve enhanced visible-light absorption and favorable hole transport through incorporation heavy main group cations with lone pair electron configurations (Sn2+, Pb2+, Bi3+). Here, we exemplify this strategy layered SnTiO3, which displays an extremely wide valence band resulting gap (Eg = 1.90 eV), effective mass among lowest known...
We present a photomemristive sensing concept based on light-induced charge storage in the 2D carbon nitride K-PHI. Our design enables memory with tuneable dynamic concentration ranges, combined diverse operation and readout modes.
This review gives conceptual insights into stimuli-responsive one-dimensional photonic crystals regarding fabrication, materials, optical properties and sensing principles.
In the field of hybrid organic-inorganic perovskite based photovoltaics, there is a growing interest in exploration novel and smarter ways to improve cells light harvesting efficiency at targeted wavelength ranges within minimum volume possible, as well development colored and/or semitransparent devices that could pave way both their architectonic integration use flowering tandem solar cells. The work herein presented targets these different goals by means theoretical optimization optical...
Abstract This study demonstrates a design that maximizes the power radiated into free space from monolayer of nanoemitters embedded in flexible distributed Bragg reflector conformably attached to metal surface. is achieved by positioning light source at precise depth within multilayer for which optical Tamm states provide enhanced quantum yield and outcoupling efficiency, are combined optimize luminous surface ensemble. approach, based on adhesion stacks onto surfaces with an arbitrary...
Abstract The intuitive use, inexpensive fabrication, and easy readout of colorimetric sensors, including photonic crystal architectures Fabry–Pérot interference have made these devices a successful commercial case, yet, understanding how the diffusion analytes occurs throughout structure is key ingredient for designing response platforms on demand. Herein, amines in periodic multilayer system composed two‐dimensional nanosheets dielectric nanoparticles tracked by combination spectroscopic...
Tailoring the interaction of electromagnetic radiation with matter is central to development optoelectronic devices. This becomes particularly relevant for a new generation devices offering possibility solution processing competitive efficiencies as well functionalities. These devices, containing novel materials such inorganic colloidal quantum dots or hybrid organic-inorganic lead halide perovskites, commonly demand thin (tens nanometers) active layers in order perform optimally and thus...
Abstract Herein, we present a prototype of photovoltaic module that combines luminescent solar concentrator integrating one‐dimensional photonic crystals and in‐plane CuInGaSe 2 (CIGS) cells. Highly uniform wide‐area nanostructured multilayers with crystal properties were deposited by cost‐efficient scalable liquid processing amenable to large‐scale fabrication. Their role is both maximize light absorption in the targeted spectral range, determined fluorophore employed, minimize losses...
Maximizing the performance of dye solar cells on plastic using a combined theoretical and experimental optimization approach.