There is an urgent need to develop efficient solutions to convert

solar energy into a transportable and clean energy form, to limit

greenhouse gases emissions, and to contrast the fossil fuel depletion

[1, 2]. There are various possibilities to use solar energy, but the use

of semiconductor materials to convert solar light into either electri-

cal or chemical energy is one of the preferable solutions, because

they offer the possibility of low-cost applications distributed on

the territory, thus eliminating some of the drawbacks associated

with centralized energy production systems [3]. Delocalization of

energy production is an important target for sustainable chem-

istry and energy [4] for a better integration with territory and

reduction of eco-impact, reduction of fuel transport safety and cost

issues, etc.