Failure and loss analysis in photovoltaic (PV) cells requires detailed knowledge of various electrical parameters, including the external quantum efficiency (EQE). EQE quantifies how effectively a solar cell converts incident photons into charge carriers and is defined as the ratio of collected charge carriers to the number of incident photons.
The standard EQE measurement procedure...
This work explores the design, fabrication (via binary lithography), and preliminary testing of transmissive binary diffractive axicons. The study investigates the axicon’s phase modulation functionality and diffraction behavior under broadband femtosecond Yb (ytterbium) pulsed laser illumination, addressing challenges such as limited phase accuracy by using binary lithography instead of more...
The Jovian system comprises a multitude of objects, such as the planet Jupiter and a large number of satellites, with the largest four being the Galilean moons Io, Europa, Callisto, and Ganymede. In April 2023, the European Space Agency (ESA) launched the Jupiter Icy Moons Explorer (JUICE) mission, projected to arrive at Jupiter in July 2031, and it will perform many studies of Jupiter and its...
This project focused on the initial work and methodology for a thesis project on the qualitative and quantitative elemental analysis of alumina (Al2O3) crystals doped with various elements, using Energy Dispersive X-ray Fluorescence (EDXRF). The broader thesis aims to adapt and optimize the existing X-ray fluorescence setup at FCUL to identify and quantify dopants within alumina crystals as...
This project focuses on behaviour modelling. It aims to unravel differences in decision-making data between individuals with Obsessive-Compulsive Disorder and healthy controls. The topic can be considered as part of Computational Psychiatry, an area of proven usefulness in the discovery of properties of mental disorders. Well-established methods, such as Reinforcement Learning and Bayesian...
In this project, the presence of the sodium doublet (NaI D1 and D2) was detected in the Wasp-76b atmosphere’s transmission spectrum, an ultra-hot Jupiter. First, it is done an introduction about this planet’s characteristics and the methods that were used to obtain all the spectra. It was analyzed 70 high-resolution spectra from ESPRESSO (Echelle Spectrograph for Rocky Exoplanet- and Stable...
This project focused on the preparatory work for a master's thesis on magnetohydrodynamic (MHD) stability analysis of the plasma current ramp-up phase in Tokamak devices, with particular attention to the JET and JT-60SA reactors. As nuclear fusion emerges as a promising clean energy source, understanding and controlling instabilities during plasma initiation is essential to improving reactor...
