Ricerc@Sapienza

In the European Union (EU), where architectural heritage is significant, enhancing the energy performance of historical buildings is of great interest. Constraints such as the lack of space, especially within the historical centers and architectural peculiarities, make the application of technologies for renewable energy production and storage a challenging issue. This study presents a prototype system consisting of using the renewable energy from a photovoltaic (PV) array to compress air for a later expansion to produce electricity when needed.

EU targets for sustainable development call for strong changes in the current energy systems as well as committed protection of environmental resources. This target conflicts if a policy is not going to promote the compatible solutions to both the issues. This is the case of the additional renewable energy sources to be exploited for increasing the share in the electricity mix and in the gross final energy consumption. Solar energy is, currently, the cheapest solution in Southern European Countries, like Italy.

Urban heat island is an anthropogenic phenomenon affecting urban outdoor thermal comfort conditions
and energy utilization. This is even truer in urban canyon con?gurations, characterized by low sky view
factor and where the effect of short-wave and long-wave solar radiation on construction surfaces is able
to produce massive outdoor local overheating. Traditional solutions cannot always be applied in urban
historical canyons, where the exteriors of buildings cannot be modi?ed due to preservation. Here, the

The operation of halide perovskite optoelectronic devices, including solar
cells and LEDs, is strongly influenced by the mobility of ions comprising the
crystal structure. This peculiarity is particularly true when considering the
long-term stability of devices. A detailed understanding of the ion migrationdriven
degradation pathways is critical to design effective stabilization
strategies. Nonetheless, despite substantial research in this first decade
of perovskite photovoltaics, the long-term effects of ion migration remain