Ricerc@Sapienza

SrRuO3 (SRO) is a perovskite increasingly used in oxide-based electronics both for its intrinsic metallicity, which remains unaltered in thin films and for the ease of deposition on dielectric perovskites like SrTiO3, (STO) to implement SRO/STO microcapacitors and other devices. In order to test the reliability of SRO/STO also as high-current on-chip conductor, when the SRO dimensions are pushed to the nanoscale, here we have measured the electrodynamic properties of arrays of nanoribbons, fabricated by lithography starting from an ultrathin film of SRO deposited on a STO substrate.

CsPbBr3 perovskite is highly desired to fabricate many optoelectronic devices: high photovoltage solar cells, tandem solar cells, light-emitting diodes, lasers, photodetectors, field effect transistors etc. However, to realize these applications the resistance to humidity, one of the most important stressing agents, needs to be understood. In this article, we investigate the effect of prolonged exposure (up to 500h) of CsPbBr3 to ~60% and 80% relative humidity by in-situ X-ray diffraction and ex-situ scanning electron microscopy and UV-visible spectroscopy.

The effect of sodium doping in NiO as a contact layer for perovskite solar cells
is investigated. A combined X-ray diffraction and X-ray photoelectron spectroscopy
analysis reveals that Na+ mostly segregates as NaOx/NaCl species around
NiO crystallites, with the effect of reducing interface capacitance as revealed by
impedance spectroscopy. Inspired by this finding, the NiO/perovskite interface
in perovskite solar cells is modified via insertion of an ultrathin NaCl interlayer,

Dry reforming could become an effective route to mitigate CO2 emission. The process required high temperatures due to its endothermicity and its accompanied by coke formation; therefore, the development of suitable catalysts is fundamental.