Ponente
Descripción
The characterization of the CuO/ZnO heterostructures and the CuO annealed samples is a key point in the development of a photovoltaic device based on copper oxide (II) (CuO) nanostructures with a novel architecture and by low-cost techniques. The obtained nanostructures were already studied by SEM, XRD, Raman and IR spectroscopy. To investigate the depth profile of elements, Rutherford Backscattering Spectroscopy (RBS) for Cu, Zn and Nuclear Reaction Analysis (NRA) for O will apply. The RBS and NRA Design Experiments take into account the parameters of the EG-5 accelerator facility at Frank Laboratory of Neutron Physics (FLNP), JINR, Dubna, Russia. Particularly, He+ ion beams of 1.5-3.0 MeV and 3.045 MeV to observe the 16O(α, α) 16O resonant nuclear reaction of oxygen, two incident angles of 0 and 60° toward the normal of the samples surface, a scattering angle of 170° and a spectrometer energy resolution of 15÷25 keV are considered. SIMNRA computer code was used to simulate pre-RBS and pre-NRA experimental spectra. The simulated spectra previous to the RBS experiments of the CuO/ZnO heterostructures considers the ZnO infiltration depth in to the CuO array. Besides, the SEM results show that the CuO layer is formed by three sub-layers. In the elemental profiles of the RBS and NRA pre-spectra simulations the role of this structured CuO layer on the recrystallization process was taken into account. The experimental spectra will reveal how close these assumed considerations were to explain the sample properties.
