Abstract: The results of studies of the structural, optical, photoluminescence, and photoelectric properties of the ZnO–LiNbO₃ thin-film structure are reported. The results of X-ray structural analysis of a zinc-oxide film synthesized on a single-crystal lithium-niobate substrate and on a quartz glassy substrate are presented. The transmittance, reflectance, absorption, photoluminescence, and photocurrent spectra of the ZnO–LiNbO₃ thin-film and ZnO–SiO₂ structures in the ultraviolet and visible spectral regions are given.