Abstract <p>Mesoporous multilayer semi-transparent conductive films were evaluated as wide-bandgap materials. Characterization of main components of the films such as functionalized carbon nanotubes (F-CNTs), magnetic iron oxide (Fe₃O₄), and emeraldine polyaniline (PANI) clusters were characterized using spectroscopic attenuated total reflectance Fourier transform infrared (ATR-FTIR) for chemical structure, thermogravimetric analysis (TGA) for thermal analysis, and microscopic scanning electron microscope (SEM) for their surface morphology. The <b>σ</b>_<b>dc</b>/<b>σ</b>_<b>op</b> values of semi-TCF nanoparticles varied from 0.001 to 0.030 and F-CNTs from 0.009 to 0.23. Optimal <b>σ</b>_<b>dc</b>/<b>σ</b>_<b>op</b> value for their best conductive properties was 23% transmittance and 7.0 kΩ/sq sheet resistance for semi-TCFs and 58%transmittance and 2.6 kΩ/sq sheet resistance for F-CNTs nanoparticles. For bandgap energy (E_g) values, the E_g values in the conventional and Tauc plot methods were in the 3.8–4.9&#xa0;eV range. Such values confirm that F-CNTs/Fe₃O₄@PANI films were wide-bandgap organic semiconductors. The promising multilayer conductive F-CNTs/Fe₃O₄@PAN films show semi-transparent wide-bandgap organic semiconductor behavior, forming a strong basis for possible implementation in electronics, optical devices, and appliances.</p> Graphical Abstract <p></p>