Author: Jesús Rodríguez-romero

Tuning optical/electrical properties of 2D/3D perovskite by the inclusion of aromatic cation

2018

The employment of bulky aliphatic cations in the manufacture of moisture-stable materials has triggered the development and application of 2D/3D perovskites as sensitizers in moisture-stable solar cells. Although it is true that the moisture stability increases, it is also true that the photovoltaic performance of 2D/3D PVK materials is severely limited owing to quantum and dielectric confinement effects. Accordingly, it is necessary the synthesis and deep optical characterization of materials with an adequate management of dielectric contrast between the layers. Here, we demonstrate the successful tuning of dielectric confinement by the inclusion of a conjugated molecule, as a bulky cation…

FabricationMaterials scienceExcitonGeneral Physics and Astronomy02 engineering and technologyDielectric010402 general chemistry021001 nanoscience & nanotechnology7. Clean energy01 natural sciences0104 chemical sciencesCharacterization (materials science)Chemical physicsCharge carrierPhysical and Theoretical Chemistry0210 nano-technologyShort circuitExcitationPerovskite (structure)

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Inhomogeneous Broadening of Photoluminescence Spectra and Kinetics of Nanometer-Thick (Phenethylammonium)2PbI4 Perovskite Thin Films: Implications fo…

2021

An outstanding potentiality of layered two-dimensional (2D) organic–inorganic hybrid perovskites (2DHPs) is in the development of solar cells, photodetectors, and light-emitting diodes. In 2DHPs, an exciton is localized in an atomically thin lead(II) halide inorganic layer of sub-nanometer thickness as in a quantum well sandwiched between organic layers as energetic and dielectric barriers. In previous years, versatile optical characterization of 2DHPs has been carried out mainly for thin flakes of single crystals and ultrathin (of the order of 20 nm) polycrystalline films, whereas there is a lack of optical characterization of thick (hundreds of nanometers) polycrystalline films, fundament…

PhotoluminescenceMaterials sciencebusiness.industryKineticspolycrystalline filmSpectral lineexcitonic photoluminescenceOptoelectronicsGeneral Materials ScienceNanometreThin film2D halide perovskitebusinessAbsorption (electromagnetic radiation)absorptioninhomogeneous broadeningPerovskite (structure)ACS Applied Nano Materials

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Fluorescence of Newo-Carborane Compounds with Different Fluorophores: Can it be Tuned?

2014

Two sets of o-carborane derivatives incorporating fluorene and anthracene fragments as fluorophore groups have been successfully synthesized and characterized, and their photophysical properties studied. The first set, comprising fluorene-containing carboranes 6-9, was prepared by catalyzed hydrosilylation reactions of ethynylfluorene with appropriate carboranylsilanes. The compound 1-[(9,9-dioctyl-fluorene-2-yl)ethynyl]carborane (11) was synthesized by the reaction of 9,9-dioctyl-2-ethynylfluorene and decaborane (B10H14). Furthermore, reactions of the lithium salt of 11 with 1 equivalent of 4-(chloromethyl)styrene or 9-(chloromethyl)anthracene yielded compounds 12 and 13. Members of the se…

AnthraceneHydrosilylationOrganic ChemistrySubstituentGeneral ChemistryFluorenePhotochemistryFluorescenceMedicinal chemistryCatalysisDilithiumchemistry.chemical_compoundchemistryDecaboraneCarboraneta116Chemistry - A European Journal

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A versatile methodology for the controlled synthesis of photoluminescent high-boron-content dendrimers.

2013

Fluorescent star-shaped mol- ecules and dendrimers with a 1,3,5-tri- phenylbenzene moiety as the core and 3 or 9 carborane derivatives at the pe- riphery, have been prepared in very good yields by following different ap- proaches. One procedure relies on the nucleophilic substitution of Br groups in 1,3,5-tris(4-(3-bromopropoxy)phe- nyl)benzene with the monolithium salts of methyl and phenyl-o-carborane. The second method is the hydrosilylation reactions on the peripheral allyl ether functions of 1,3,5-tris(4-allyloxy-phe- nyl)benzene and 1,3,5-tris(4-(3,4,5-tris- AAA with suitable carboranyl-silanes to produce different generations of dendrimers decorated with carboranyl fragments. This ap…

HydrosilylationOrganic ChemistrySubstituentchemistry.chemical_elementEtherGeneral ChemistryPhotochemistryCatalysischemistry.chemical_compoundchemistryDendrimerPolymer chemistryCarboraneMoietyBoronta116MacromoleculeChemistry (Weinheim an der Bergstrasse, Germany)

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