I was trained in the use of different laser sources, including a titanium-sapphire femtosecond laser. I was also trained in the use of optical tables and of diverse optical components. I learnt to use a streak-camera to record photoluminescence (PL) decays in the picosecond time range. Additionally, I acquired further experience in fluorescence confocal microscopy and fluorescence polarization microscopy. I also learnt to record phosphorescence decays in the micro- to millisecond time range. As regards data analysis, I learnt to interpret PL decays and PL spectra with the aim of obtaining information about close-range interactions between tightly packed molecules. Regarding the research projects in which I participated, I studied the photophysical properties of ultrathin organic semiconductor films, Metal-Organic Frameworks, and phosphorene sheets. In particular, my work was dedicated to finding a correlation between the micro- and nanostructure of the foregoing materials and their PL spectra, PL quantum yields, and PL decay times. The long-term goal was to use this information to improve the performance of optoelectronic devices.