The structure and luminescent properties of a hybrid system based on fullerene C 60 embedded in a porous silicon matrix have been studied. The investigation of the surface topology of a por-Si-C 60 nanostructured layer by AFM shows clearly the incorporation of C 60 nanocrystals inside pores of silicone. According to FTIR spectroscopy, a covalent interaction between the surface of a fullerene cluster and porous silicon takes place. This has influence on the luminescent properties of porous silicon, which is of a special interest for cathode luminescence spectra with the appearance of an additional band at E ¼ 3.2À3.4 eV. A possible mechanism of such an effect is discussed.
The processes of charge-carrier transport and relaxation in silicon-oxide heterostructures based on porous silicon have been studied, by using voltammetric measurements and thermoactivation spectroscopy. The temperature dependences of the conductivity in experimental structures are measured in an interval of 80-325 K, and the activation energy of the electrical conductivity is determined. On the basis of the temperature dependences obtained for the depolarization current, the energy distribution of localized electron states, which affect the charge transport processes, is calculated. The influence of coating the porous silicon layer with a thin SiO film on the electrical properties of the layer is analyzed. The obtained results extend the application scope of silicon-oxide nanosystems.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.