Listar Departament: Física por título
-
Impact of Capacitive Effect and Ion Migration on the Hysteretic Behavior of Perovskite Solar Cells
American Chemical Society (2015-11)In the past five years, perovskite solar cells (PSCs) based on organometal halide perovskite have exhibited extraordinary photovoltaic (PV) performance. However, the PV measurements of PSCs have been widely recognized to ... -
Impact of Oxygen Vacancy Occupancy on Charge Carrier Dynamics in BiVO4 Photoanodes
American Chemical Society (2019-11-27)Oxygen vacancies are ubiquitous in metal oxides and critical to performance, yet the impact of these states upon charge carrier dynamics important for photoelectrochemical and photocatalytic applications remains contentious ... -
Impedance of carrier injection at the metal-organic interface mediated by surface states in electron-only tris(8-hydroxyquinoline) aluminium (Alq<sub>3</sub>) thin layers
Elsevier (2008)Capacitance spectra of thin (<200 nm) Alq<sub>3</sub> electron-only devices have been measured as a function of bias voltage. Capacitance spectra exhibit a flat response at high frequencies (>10<sup>3</sup> Hz) and ... -
Impedance spectroscopic analysis of high-performance dye sensitized solar cells based on nano-clay electrolytes
Elsevier (2016)In this work we present quasi-solid state dye-sensitized solar cells obtained employing artificial hydrotalcite nano-clay as electrolyte additive, with a greatly improved photo-energy conversion efficiency of up to 10.9% ... -
Impedance Spectroscopy Analysis of the Effect of TiO2 Blocking Layers on the Efficiency of Dye Sensitized Solar Cells
American Chemical Society (2012)The introduction of a dense TiO2 layer between the mesoporous TiO2 network and the charge collector in dye-sensitized solar cell anodes has been claimed to improve the performance of solar cell devices. Two mechanisms have ... -
Impedance spectroscopy characterisation of highly efficient silicon solar cells under different light illumination intensities
Royal Society of Chemistry (2009)Highly efficient silicon solar cells have been characterised by impedance spectroscopy and current–potential characteristic in the dark and with different illumination intensities. For each illumination the impedance ... -
Impedance Spectroscopy Measurements in Perovskite Solar Cells: Device Stability and Noise Reduction
American Chemical Society (2018) -
Impedance spectroscopy of thin-film CdTe/CdS solar cells under varied illumination
American Institute of Physics (2009)The electrical properties of CdTe/CdS solar cells grown by metal organic chemical vapor deposition were investigated by a technique of impedance measurements under varied intensity of AM1.5 illumination. A generalized ... -
Improvement of optical and conductivity properties of SnS2 via Cr doping for photovoltaic applications
Elsevier (2023-10-15)Tin disulfide doped with chromium (Sn1−xCrxS2) powders with different molar ratios (x = 0, 2, 4, 6, and 10 at%) were synthesized using a low-cost hydrothermal technique. The prepared samples were characterized by X-ray ... -
Improvement of Photovoltaic Performance of Colloidal Quantum Dot Solar Cells Using Organic Small Molecule as Hole-Selective Layer
American Chemical Society (2017-04)A novel organic small molecule bis-triphenylamine with spiro(fluorene-9,9′-xanthene) as the conjugated system, named BTPA-4, is successfully synthesized and employed as the hole-selective layer (HSL) in colloidal quantum ... -
In situ decoration of graphene sheets with gold nanoparticles synthetized by pulsed laser ablation in liquids
(2016-07)The demand for nanocomposites of graphene and carbonaceous materials decorated with metallic nanoparticles is increasing on account of their applications in science and technology. Traditionally, the production of ... -
In situ investigation of dewaxing and sintering of stainless steel powder compacts by impulse excitation
Elsevier (2008)The dewaxing and sintering behaviour of 316LHD (high-density) powder metallurgy stainless steel grade have been in situ characterized by means of the high-temperature impulse excitation technique. The evolution of the E ... -
In Situ Spectroscopic Ellipsometry for Thermochromic CsPbI3 Phase Evolution Portfolio
American Chemical Society (2020-04-09)Thermochromism is a color change phenomenon for a compound when it undergoes a heating/cooling process. The observation of this phenomenon mostly relies on the naked eye, rather than an exact optical technique, which retards ... -
Inactivation of SARS-CoV-2 by a chitosan/α-Ag2WO4 composite generated by femtosecond laser irradiation
Nature Research (2022)In the current COVID‑19 pandemic, the next generation of innovative materials with enhanced anti‑ SARS‑CoV‑2 activity is urgently needed to prevent the spread of this virus within the community. Herein, we report the ... -
Increased salt concentration promotes competitive block of OmpF channel by protons
Elsevier (2012-11)Porins are channel-forming proteins that are located in the outer membranes (OM) of Gram-negative bacteria and allow the influx of hydrophilic nutrients and the extrusion of waste products. The fine regulation of the ion ... -
Inductive and Capacitive Hysteresis of Halide Perovskite Solar Cells and Memristors Under Illumination
Frontiers Media (2022)The current–voltage curves of memristors exhibit significant hysteresis effects of use for information storage and computing. Here, we provide a comparison of different devices based on MAPbI3 perovskite with different ... -
Influence of cysteine adsorption on the performance of CdSe quantum dots sensitized solar cells
Elsevier (2010)The surface of mesoporous TiO<sub>2</sub> electrodes has been functionalized with cysteine using different solutions for the subsequent attachment of colloidal CdSe QDs solved in toluene. The adsorption behavior of both ... -
Influence of solvent on the network structure formed by free radical polymerization of tri-ethylene glycol dimethacrylate: A dielectric study
Elsevier (2010)Molecular mobility of a series of tri-ethylene glycol dimethacrylate (TrEGDMA) samples polymerized with different amounts of ethyl acetate up to 40% (w/w) as diluent was investigated by dielectric relaxation spectroscopy. ... -
Influence of the anion on diffusivity and mobility of ionic liquids composite polybenzimidazol membranes
Elsevier (2020-07-04)The study of proton conductivity processes has received increasing attention in the past decades due to their potential applications in fields such as electrochemical devices and fuel cells. Despite the high number of ... -
Influence of the Potassium Chloride Concentration on the Physical Properties of Electrodeposited ZnO Nanowire Arrays
American Chemical Society (2008)The structural, electrical, and optical properties of zinc oxide nanowire arrays electrodeposited from the reduction of molecular oxygen in aqueous solutions containing zinc chloride and potassium chloride are studied as ...