Photoelectric properties of $n$-TiO$_2$/$p$-Co$_{0.7}$Ni$_{0.3}$O heterostructures

The main photoelectric parameters of $n$-TiO$_2$/$p$-Co$_{0.7}$Ni$_{0.3}$O film heterostructures obtained by sequential sputtering of corresponding metal targets in oxidizing atmosphere have been determined. The heterostructures are photosensitive in a wavelength range of 225–385 nm and exhibit no photoresponse in the visible spectral range. The proposed structures can be used for creating photodetectors with high spectral selectivity.