Abstarct: In this research, the zinc oxide (ZnO) laxyers were first deposited by chemical bath method, and the physical and light detection properties of deposited the samples on the glass and Teflon substrates in flat and porous conditions with a mextal-semiconductor-mextal (MSM) configurations under ultraviolet LED radiation, also a photodiode (with silicon substrate) under different visible LED light illuminations were investigated. Then, we studied the ZnO thin laxyers grown by the pyrolysis spray method in order to achieve the optimal conditions for a laxyer with the highest simultaneous transparency and electrical conductivity. For physical characterization of the samples, we used a field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (EDX), Raman spectroscopy, ultraviolet-visible optical spectroscopy (UV-Vis), photoluminescence spectroscopy (PL), Hall effect, current-voltage (I-V), and current-time (I-t) measurements in dark and under light illumination. In the first step, we investigated the physical properties and ultraviolet (UV) light detection characteristics of ZnO laxyers deposited by chemical bath deposition (CBD) on flat and porous glass and flexible teflon substrates, once with the seed laxyer prepared by the sputtering method and again with the seed laxyer prepared by the spin coating method. Then we investigated the effect of the concentration of the solution on the physical properties and photoconductivity of the laxyers. It was found that samples with 0.05 M concentration on glass and Teflon substrates had the highest light sensitivity to UV light radiation compared to other samples. In the following, by replacing the p-Si substrate, we investigated the effect of the ZnO solution concentration on the physical properties as well as the electrical and optoelectrical characteristics of the fabricated n-ZnO/p-Si photodiodes under different visible LED illuminations. It is found that the synthesized sample with a concentration of 0.05 M showed the highest value of light sensitivity (S) and responsivity (R*) compared to other samples (i.e., 460 and 31 mA/W for blue, 201 and 14 mA/W for green, and 190 and 13 mA/W for red light). In the end, in order to achieve the optimal conditions for the growth of the zinc oxide laxyer with the highest simultaneous transparency and electrical conductivity, we studied various parameters, including the effect of the substrate temperature, solution concentration, volume of acetic acid in the solution, and Al-doping using the spray pyrolysis method. The results indicate that the optimal sample has a figure of merit of (2.68×10-4 Ω-1), which is about One and a half times higher than other reports.